diff --git a/common/thorhelper/thorcommon.hpp b/common/thorhelper/thorcommon.hpp
index 2378dc4ae8b..f4f3659fdb0 100644
--- a/common/thorhelper/thorcommon.hpp
+++ b/common/thorhelper/thorcommon.hpp
@@ -18,6 +18,7 @@
 #ifndef THORCOMMON_HPP
 #define THORCOMMON_HPP
 
+#include "jlog.hpp"
 #include "jiface.hpp"
 #include "jcrc.hpp"
 #include "jlzw.hpp"
@@ -672,6 +673,96 @@ class THORHELPER_API IndirectCodeContext : implements ICodeContext
 protected:
     ICodeContext * ctx;
 };
+class CStatsContextLogger : public CSimpleInterfaceOf<IContextLogger>
+{
+protected:
+    const LogMsgJobInfo & job;
+    unsigned traceLevel = 1;
+    LogTrace logTrace;
+    mutable CRuntimeStatisticCollection stats;
+public:
+    CStatsContextLogger(const CRuntimeStatisticCollection  &_mapping, const LogMsgJobInfo _job=unknownJob) : job(_job), stats(_mapping) {}
+
+    virtual void CTXLOGva(const LogMsgCategory & cat, const LogMsgJobInfo & job, LogMsgCode code, const char *format, va_list args) const override  __attribute__((format(printf,5,0)))
+    {
+        VALOG(cat, job, code, format, args);
+    }
+    virtual void logOperatorExceptionVA(IException *E, const char *file, unsigned line, const char *format, va_list args) const __attribute__((format(printf,5,0)))
+    {
+        StringBuffer ss;
+        ss.append("ERROR");
+        if (E)
+            ss.append(": ").append(E->errorCode());
+        if (file)
+            ss.appendf(": %s(%d) ", file, line);
+        if (E)
+            E->errorMessage(ss.append(": "));
+        if (format)
+            ss.append(": ").valist_appendf(format, args);
+        LOG(MCoperatorProgress, queryJob(), "%s", ss.str());
+    }
+    virtual void noteStatistic(StatisticKind kind, unsigned __int64 value) const override
+    {
+        stats.addStatisticAtomic(kind, value);
+    }
+    virtual void setStatistic(StatisticKind kind, unsigned __int64 value) const override
+    {
+        stats.setStatistic(kind, value);
+    }
+    virtual void mergeStats(const CRuntimeStatisticCollection &from) const override
+    {
+        stats.merge(from);
+    }
+    virtual unsigned queryTraceLevel() const override
+    {
+        return traceLevel;
+    }
+    virtual void setGlobalId(const char *id, SocketEndpoint &ep, unsigned pid) override
+    {
+        logTrace.setGlobalId(id);
+    }
+    virtual void setCallerId(const char *id) override
+    {
+        logTrace.setCallerId(id);
+    }
+    virtual const char *queryGlobalId() const override
+    {
+        return logTrace.queryGlobalId();
+    }
+    virtual const char *queryLocalId() const override
+    {
+        return logTrace.queryLocalId();
+    }
+    virtual const char *queryCallerId() const override
+    {
+        return logTrace.queryCallerId();
+    }
+    virtual void setHttpIdHeaderNames(const char *global, const char *caller) override
+    {
+        logTrace.setHttpIdHeaderNames(global, caller);
+    }
+    virtual const char *queryGlobalIdHttpHeaderName() const override
+    {
+        return logTrace.queryGlobalIdHTTPHeaderName();
+    }
+    virtual const char *queryCallerIdHttpHeaderName() const override
+    {
+        return logTrace.queryCallerIdHTTPHeaderName();
+    }
+    virtual const CRuntimeStatisticCollection &queryStats() const override
+    {
+        return stats;
+    }
+    virtual void recordStatistics(IStatisticGatherer &progress) const override
+    {
+        stats.recordStatistics(progress, false);
+    }
+    void updateStatsDeltaTo(CRuntimeStatisticCollection &to, CRuntimeStatisticCollection &previous)
+    {
+        previous.updateDelta(to, stats);
+    }
+    virtual const LogMsgJobInfo & queryJob() const override { return job; }
+};
 
 extern THORHELPER_API bool isActivitySink(ThorActivityKind kind);
 extern THORHELPER_API bool isActivitySource(ThorActivityKind kind);
diff --git a/ecl/hthor/hthorkey.cpp b/ecl/hthor/hthorkey.cpp
index 9f5b46155ad..16ea4aee6ab 100644
--- a/ecl/hthor/hthorkey.cpp
+++ b/ecl/hthor/hthorkey.cpp
@@ -27,6 +27,7 @@
 #include "thorcommon.hpp"
 #include "rtldynfield.hpp"
 #include "thorfile.hpp"
+#include "jstats.h"
 
 #define MAX_FETCH_LOOKAHEAD 1000
 
@@ -200,24 +201,10 @@ class CHThorIndexReadActivityBase : public CHThorActivityBase
     {
         CHThorActivityBase::updateProgress(progress);
         StatsActivityScope scope(progress, activityId);
+        contextLogger.recordStatistics(progress);
         progress.addStatistic(StNumPostFiltered, queryPostFiltered());
-        progress.addStatistic(StNumIndexSeeks, querySeeks());
-        progress.addStatistic(StNumIndexScans, queryScans());
-        progress.addStatistic(StNumIndexWildSeeks, queryWildSeeks());
     }
 
-    virtual unsigned querySeeks() const
-    {
-        return seeks + (klManager ? klManager->querySeeks() : 0);
-    }
-    virtual unsigned queryScans() const
-    {
-        return scans + (klManager ? klManager->queryScans() : 0);
-    }
-    virtual unsigned queryWildSeeks() const
-    {
-        return wildseeks + (klManager ? klManager->queryWildSeeks() : 0);
-    }
     virtual unsigned queryPostFiltered() const
     {
         return postFiltered;
@@ -281,10 +268,8 @@ class CHThorIndexReadActivityBase : public CHThorActivityBase
     UnsignedArray superIndexCache;
     unsigned keyIndexCacheIdx = 0;
 
-    unsigned seeks;
-    unsigned scans;
     unsigned postFiltered;
-    unsigned wildseeks;
+    CStatsContextLogger contextLogger;
     bool singlePart = false;                // a single part index, not part of a super file - optimize so never reload the part.
     bool localSortKey = false;
     bool initializedFileInfo = false;
@@ -306,16 +291,13 @@ class CHThorIndexReadActivityBase : public CHThorActivityBase
 };
 
 CHThorIndexReadActivityBase::CHThorIndexReadActivityBase(IAgentContext &_agent, unsigned _activityId, unsigned _subgraphId, IHThorIndexReadBaseArg &_arg, ThorActivityKind _kind, EclGraph & _graph, IPropertyTree *_node)
-    : CHThorActivityBase(_agent, _activityId, _subgraphId, _arg, _kind, _graph), helper(_arg)
+    : CHThorActivityBase(_agent, _activityId, _subgraphId, _arg, _kind, _graph), helper(_arg), contextLogger(jhtreeCacheStatistics)
 {
     nextPartNumber = 0;
 
     eclKeySize.set(helper.queryDiskRecordSize());
 
     postFiltered = 0;
-    seeks = 0;
-    scans = 0;
-    wildseeks = 0;
     helper.setCallback(&callback);
     limitTransformExtra = nullptr;
     if (_node)
@@ -437,7 +419,7 @@ bool CHThorIndexReadActivityBase::doPreopenLimitFile(unsigned __int64 & count, u
         {
             Owned<IKeyIndex> tlk = openKeyFile(df->queryPart(num));
             verifyIndex(tlk);
-            Owned<IKeyManager> tlman = createLocalKeyManager(eclKeySize.queryRecordAccessor(true), tlk, NULL, helper.hasNewSegmentMonitors(), false);
+            Owned<IKeyManager> tlman = createLocalKeyManager(eclKeySize.queryRecordAccessor(true), tlk, &contextLogger, helper.hasNewSegmentMonitors(), false);
             initManager(tlman, true);
             while(tlman->lookup(false) && (count<=limit))
             {
@@ -473,7 +455,7 @@ IKeyIndex * CHThorIndexReadActivityBase::doPreopenLimitPart(unsigned __int64 & r
         verifyIndex(kidx);
     if (limit != (unsigned) -1)
     {
-        Owned<IKeyManager> kman = createLocalKeyManager(eclKeySize.queryRecordAccessor(true), kidx, NULL, helper.hasNewSegmentMonitors(), false);
+        Owned<IKeyManager> kman = createLocalKeyManager(eclKeySize.queryRecordAccessor(true), kidx, &contextLogger, helper.hasNewSegmentMonitors(), false);
         initManager(kman, false);
         result += kman->checkCount(limit-result);
     }
@@ -572,10 +554,10 @@ void CHThorIndexReadActivityBase::initManager(IKeyManager *manager, bool isTlk)
     manager->reset();
 }
 
-void CHThorIndexReadActivityBase::initPart()                                    
-{ 
+void CHThorIndexReadActivityBase::initPart()
+{
     assertex(!keyIndex->isTopLevelKey());
-    klManager.setown(createLocalKeyManager(eclKeySize.queryRecordAccessor(true), keyIndex, NULL, helper.hasNewSegmentMonitors(), false));
+    klManager.setown(createLocalKeyManager(eclKeySize.queryRecordAccessor(true), keyIndex, &contextLogger, helper.hasNewSegmentMonitors(), false));
     initManager(klManager, false);
     callback.setManager(klManager, nullptr);
 }
@@ -584,12 +566,7 @@ void CHThorIndexReadActivityBase::killPart()
 {
     callback.setManager(nullptr, nullptr);
     if (klManager)
-    {
-        seeks += klManager->querySeeks();
-        scans += klManager->queryScans();
-        wildseeks += klManager->queryWildSeeks();
         klManager.clear();
-    }
 }
 
 bool CHThorIndexReadActivityBase::setCurrentPart(unsigned whichPart)
@@ -614,7 +591,7 @@ bool CHThorIndexReadActivityBase::firstMultiPart()
     if(!tlk)
         openTlk();
     verifyIndex(tlk);
-    tlManager.setown(createLocalKeyManager(eclKeySize.queryRecordAccessor(true), tlk, NULL, helper.hasNewSegmentMonitors(), false));
+    tlManager.setown(createLocalKeyManager(eclKeySize.queryRecordAccessor(true), tlk, &contextLogger, helper.hasNewSegmentMonitors(), false));
     initManager(tlManager, true);
     nextPartNumber = 0;
     return nextMultiPart();
@@ -3044,11 +3021,11 @@ class KeyedLookupPartHandler : extends ThreadedPartHandler<MatchSet>, implements
     Owned<IKeyManager> manager;
     IAgentContext &agent;
     DistributedKeyLookupHandler * tlk;
-
+    IContextLogger &contextLogger;
 public:
     IMPLEMENT_IINTERFACE;
 
-    KeyedLookupPartHandler(IJoinProcessor &_owner, IDistributedFilePart *_part, DistributedKeyLookupHandler * _tlk, unsigned _subno, IThreadPool * _threadPool, IAgentContext &_agent);
+    KeyedLookupPartHandler(IJoinProcessor &_owner, IDistributedFilePart *_part, DistributedKeyLookupHandler * _tlk, unsigned _subno, IThreadPool * _threadPool, IAgentContext &_agent, IContextLogger & _contextLogger);
 
     ~KeyedLookupPartHandler()
     {
@@ -3098,6 +3075,7 @@ class DistributedKeyLookupHandler : public CInterface, implements IThreadedExcep
     Owned<IThreadPool> threadPool;
     IntArray subSizes;
     IAgentContext &agent;
+    IContextLogger &contextLogger;
 
     void addFile(IDistributedFile &f)
     {
@@ -3108,7 +3086,7 @@ class DistributedKeyLookupHandler : public CInterface, implements IThreadedExcep
         for (unsigned idx = 0; idx < numParts; idx++)
         {
             IDistributedFilePart *part = f.getPart(idx);
-            parts.append(*new KeyedLookupPartHandler(owner, part, this, tlks.ordinality(), threadPool, agent));
+            parts.append(*new KeyedLookupPartHandler(owner, part, this, tlks.ordinality(), threadPool, agent, contextLogger));
         }
         keyFiles.append(OLINK(f));
         tlks.append(*f.getPart(numParts));
@@ -3118,8 +3096,8 @@ class DistributedKeyLookupHandler : public CInterface, implements IThreadedExcep
 public:
     IMPLEMENT_IINTERFACE;
 
-    DistributedKeyLookupHandler(IDistributedFile *f, IJoinProcessor &_owner, IAgentContext &_agent)
-        : owner(_owner), file(f), agent(_agent)
+    DistributedKeyLookupHandler(IDistributedFile *f, IJoinProcessor &_owner, IAgentContext &_agent, IContextLogger & _contextLogger)
+        : owner(_owner), file(f), agent(_agent), contextLogger(_contextLogger)
     {
         threadPool.setown(createThreadPool("hthor keyed join lookup thread pool", &threadFactory));
         IDistributedSuperFile *super = f->querySuperFile();
@@ -3184,7 +3162,7 @@ class DistributedKeyLookupHandler : public CInterface, implements IThreadedExcep
             //Owned<IRecordLayoutTranslator> 
             trans.setown(owner.getLayoutTranslator(&f));
             owner.verifyIndex(&f, index, trans);
-            Owned<IKeyManager> manager = createLocalKeyManager(owner.queryIndexRecord(), index, NULL, owner.hasNewSegmentMonitors(), false);
+            Owned<IKeyManager> manager = createLocalKeyManager(owner.queryIndexRecord(), index, &contextLogger, owner.hasNewSegmentMonitors(), false);
             managers.append(*manager.getLink());
         }
         opened = true;
@@ -3213,8 +3191,8 @@ class DistributedKeyLookupHandler : public CInterface, implements IThreadedExcep
     const IDynamicTransform * queryRecordLayoutTranslator() const { return trans; }
 };
 
-KeyedLookupPartHandler::KeyedLookupPartHandler(IJoinProcessor &_owner, IDistributedFilePart *_part, DistributedKeyLookupHandler * _tlk, unsigned _subno, IThreadPool * _threadPool, IAgentContext &_agent)
-    : ThreadedPartHandler<MatchSet>(_part, _tlk, _threadPool), owner(_owner), agent(_agent), tlk(_tlk)
+KeyedLookupPartHandler::KeyedLookupPartHandler(IJoinProcessor &_owner, IDistributedFilePart *_part, DistributedKeyLookupHandler * _tlk, unsigned _subno, IThreadPool * _threadPool, IAgentContext &_agent, IContextLogger & _contextLogger)
+    : ThreadedPartHandler<MatchSet>(_part, _tlk, _threadPool), owner(_owner), agent(_agent), tlk(_tlk), contextLogger(_contextLogger)
 {
 }
 
@@ -3223,7 +3201,7 @@ void KeyedLookupPartHandler::openPart()
     if(manager)
         return;
     Owned<IKeyIndex> index = openKeyFile(*part);
-    manager.setown(createLocalKeyManager(owner.queryIndexRecord(), index, NULL, owner.hasNewSegmentMonitors(), false));
+    manager.setown(createLocalKeyManager(owner.queryIndexRecord(), index, &contextLogger, owner.hasNewSegmentMonitors(), false));
     const IDynamicTransform * trans = tlk->queryRecordLayoutTranslator();
     if(trans && !index->isTopLevelKey())
         manager->setLayoutTranslator(trans);
@@ -3238,13 +3216,14 @@ class MonolithicKeyLookupHandler : public CInterface, implements IKeyLookupHandl
     IJoinProcessor &owner;
     IAgentContext &agent;
     bool opened;
+    IContextLogger &contextLogger;
 
 public:
     IMPLEMENT_IINTERFACE;
 
 
-    MonolithicKeyLookupHandler(IDistributedFile *f, IJoinProcessor &_owner, IAgentContext &_agent)
-        : file(f), owner(_owner), agent(_agent), opened(false)
+    MonolithicKeyLookupHandler(IDistributedFile *f, IJoinProcessor &_owner, IAgentContext &_agent, IContextLogger & _contextLogger)
+        : file(f), owner(_owner), agent(_agent), opened(false), contextLogger(_contextLogger)
     {
         super = f->querySuperFile();
         if (super)
@@ -3303,7 +3282,7 @@ class MonolithicKeyLookupHandler : public CInterface, implements IKeyLookupHandl
             {
                 Owned<IKeyIndex> index = openKeyFile(f.queryPart(0));
                 owner.verifyIndex(&f, index, trans);
-                manager.setown(createLocalKeyManager(owner.queryIndexRecord(), index, NULL, owner.hasNewSegmentMonitors(), false));
+                manager.setown(createLocalKeyManager(owner.queryIndexRecord(), index, &contextLogger, owner.hasNewSegmentMonitors(), false));
             }
             else
             {
@@ -3316,7 +3295,7 @@ class MonolithicKeyLookupHandler : public CInterface, implements IKeyLookupHandl
                     parts->addIndex(index.getLink());
                 }
                 owner.verifyIndex(&f, index, trans);
-                manager.setown(createKeyMerger(owner.queryIndexRecord(), parts, 0, nullptr, owner.hasNewSegmentMonitors(), false));
+                manager.setown(createKeyMerger(owner.queryIndexRecord(), parts, 0, &contextLogger, owner.hasNewSegmentMonitors(), false));
             }
             if(trans)
                 manager->setLayoutTranslator(trans);
@@ -3412,9 +3391,6 @@ class CHThorKeyedJoinActivity  : public CHThorThreadedActivityBase, implements I
     RelaxedAtomic<unsigned> prefiltered;
     RelaxedAtomic<unsigned> postfiltered;
     RelaxedAtomic<unsigned> skips;
-    unsigned seeks;
-    unsigned scans;
-    unsigned wildseeks;
     OwnedRowArray extractedRows;
     Owned <ILocalOrDistributedFile> ldFile;
     IDistributedFile * dFile;
@@ -3426,15 +3402,15 @@ class CHThorKeyedJoinActivity  : public CHThorThreadedActivityBase, implements I
     Owned<const IDynamicTransform> translator;
     RecordTranslationMode recordTranslationModeHint = RecordTranslationMode::Unspecified;
     bool isCodeSigned = false;
+    CStatsContextLogger contextLogger;
+
 public:
     CHThorKeyedJoinActivity(IAgentContext &_agent, unsigned _activityId, unsigned _subgraphId, IHThorKeyedJoinArg &_arg, ThorActivityKind _kind, EclGraph & _graph, IPropertyTree *_node)
-        : CHThorThreadedActivityBase(_agent, _activityId, _subgraphId, _arg, _arg, _kind, _graph, _arg.queryDiskRecordSize(), _node), helper(_arg)
+        : CHThorThreadedActivityBase(_agent, _activityId, _subgraphId, _arg, _arg, _kind, _graph, _arg.queryDiskRecordSize(), _node), helper(_arg), contextLogger(jhtreeCacheStatistics)
     {
         prefiltered = 0;
         postfiltered = 0;
         skips = 0;
-        seeks = 0;
-        scans = 0;
         eclKeySize.set(helper.queryIndexRecordSize());
         if (_node)
         {
@@ -3990,9 +3966,9 @@ class CHThorKeyedJoinActivity  : public CHThorThreadedActivityBase, implements I
                 mono = useMonolithic(*dFile);
             }
             if (mono)
-                lookup.setown(new MonolithicKeyLookupHandler(dFile, *this, agent));
+                lookup.setown(new MonolithicKeyLookupHandler(dFile, *this, agent, contextLogger));
             else
-                lookup.setown(new DistributedKeyLookupHandler(dFile, *this, agent));
+                lookup.setown(new DistributedKeyLookupHandler(dFile, *this, agent, contextLogger));
             agent.logFileAccess(dFile, "HThor", "READ", graph);
         }
         else
@@ -4015,10 +3991,6 @@ class CHThorKeyedJoinActivity  : public CHThorThreadedActivityBase, implements I
     virtual void doneManager(IKeyManager * manager)
     {
         manager->releaseSegmentMonitors();
-        CriticalBlock b(statsCrit);
-        seeks += manager->querySeeks();
-        scans += manager->queryScans();
-        wildseeks += manager->queryWildSeeks();
     }
 
     virtual bool addMatch(MatchSet * ms, IKeyManager * manager)
@@ -4089,9 +4061,7 @@ class CHThorKeyedJoinActivity  : public CHThorThreadedActivityBase, implements I
         progress.addStatistic(StNumPreFiltered, prefiltered);
         progress.addStatistic(StNumPostFiltered, postfiltered);
         progress.addStatistic(StNumIndexSkips, skips);
-        progress.addStatistic(StNumIndexSeeks, seeks);
-        progress.addStatistic(StNumIndexScans, scans);
-        progress.addStatistic(StNumIndexWildSeeks, wildseeks);
+        contextLogger.recordStatistics(progress);
     }
 
 protected:
diff --git a/fs/dafsclient/rmtfile.cpp b/fs/dafsclient/rmtfile.cpp
index 7b876e63883..1d1d9c96f42 100644
--- a/fs/dafsclient/rmtfile.cpp
+++ b/fs/dafsclient/rmtfile.cpp
@@ -2525,10 +2525,6 @@ class CRemoteKey : public CSimpleInterfaceOf<IIndexLookup>
         pending = true;
         return prefetchBuffer.queryRow();
     }
-    virtual unsigned querySeeks() const override { return 0; } // not sure how best to handle these, perhaps should log/record somewhere on server-side
-    virtual unsigned queryScans() const override { return 0; }
-    virtual unsigned querySkips() const override { return 0; }
-    virtual unsigned queryWildSeeks() const override { return 0; }
 };
 
 
diff --git a/roxie/ccd/ccd.hpp b/roxie/ccd/ccd.hpp
index 2eda5bede1c..9fc2a9c6a7c 100644
--- a/roxie/ccd/ccd.hpp
+++ b/roxie/ccd/ccd.hpp
@@ -780,6 +780,10 @@ class ContextLogger : implements IRoxieContextLogger, public CInterface
     {
         return stats;
     }
+    virtual void recordStatistics(IStatisticGatherer &progress) const override
+    {
+        stats.recordStatistics(progress, false);
+    }
 };
 
 class StringContextLogger : public ContextLogger
diff --git a/roxie/ccd/ccdactivities.cpp b/roxie/ccd/ccdactivities.cpp
index 3f91de618c6..3d0f364e604 100644
--- a/roxie/ccd/ccdactivities.cpp
+++ b/roxie/ccd/ccdactivities.cpp
@@ -2996,7 +2996,13 @@ class CRoxieIndexReadActivity : public CRoxieIndexActivity, implements IIndexRea
                         if (continuationNeeded && !continuationFailed)
                         {
                             if (doTrace(traceSmartStepping, TraceFlags::Detailed))
-                                logctx.CTXLOG("Indexread returning partial result set %d rows from %d seeks, %d scans, %d skips", processed-processedBefore, tlk->querySeeks(), tlk->queryScans(), tlk->querySkips());
+                            {
+                                const CRuntimeStatisticCollection & stats = logctx.queryStats();
+                                unsigned __int64 seeks = stats.getStatisticValue(StNumIndexSeeks);
+                                unsigned __int64 scans = stats.getStatisticValue(StNumIndexScans);
+                                unsigned __int64 skips = stats.getStatisticValue(StNumIndexSkips);
+                                logctx.CTXLOG("Indexread returning partial result set %d rows from %" I64F"u seeks, %" I64F"u scans, %" I64F"u skips", processed-processedBefore, seeks, scans, skips);
+                            }
                             if (sendContinuation(output))
                             {
                                 noteStats(keyprocessed-keyprocessedBefore, skipped);
@@ -3023,7 +3029,11 @@ class CRoxieIndexReadActivity : public CRoxieIndexActivity, implements IIndexRea
         {
             if (doTrace(traceSmartStepping, TraceFlags::Max) && !aborted)
             {
-                logctx.CTXLOG("Indexread returning result set %d rows from %d seeks, %d scans, %d skips", processed-processedBefore, tlk->querySeeks(), tlk->queryScans(), tlk->querySkips());
+                const CRuntimeStatisticCollection & stats = logctx.queryStats();
+                unsigned __int64 seeks = stats.getStatisticValue(StNumIndexSeeks);
+                unsigned __int64 scans = stats.getStatisticValue(StNumIndexScans);
+                unsigned __int64 skips = stats.getStatisticValue(StNumIndexSkips);
+                logctx.CTXLOG("Indexread returning result set %d rows from %" I64F"u seeks, %" I64F"u scans, %" I64F"u skips", processed-processedBefore, seeks, scans, skips);
                 if (steppingOffset)
                     logctx.CTXLOG("Indexread return: steppingOffset %d, steppingRow %p, stepExtra.returnMismatches() %d",steppingOffset, steppingRow, (int) stepExtra.returnMismatches());
             }
diff --git a/roxie/ccd/ccdcontext.cpp b/roxie/ccd/ccdcontext.cpp
index 9c8d844a641..d5771f2f0f0 100644
--- a/roxie/ccd/ccdcontext.cpp
+++ b/roxie/ccd/ccdcontext.cpp
@@ -1327,7 +1327,14 @@ class CRoxieContextBase : implements IRoxieAgentContext, implements ICodeContext
     {
         return logctx.getStats(ret);
     }
-
+    virtual void recordStatistics(IStatisticGatherer &progress) const override
+    {
+        globalStats.recordStatistics(progress, false);
+    }
+    virtual void updateStatsDeltaTo(CRuntimeStatisticCollection &to, CRuntimeStatisticCollection &previous)
+    {
+        globalStats.updateDelta(to, globalStats);
+    }
     virtual void CTXLOGa(TracingCategory category, const LogMsgCategory & cat, const LogMsgJobInfo & job, LogMsgCode code, const char *prefix, const char *text) const override
     {
         logctx.CTXLOGa(category, cat, job, code, prefix, text);
diff --git a/roxie/ccd/ccdserver.cpp b/roxie/ccd/ccdserver.cpp
index a6c4bf59e37..fd66694fcde 100644
--- a/roxie/ccd/ccdserver.cpp
+++ b/roxie/ccd/ccdserver.cpp
@@ -231,6 +231,10 @@ class IndirectAgentContext : implements IRoxieAgentContext, public CInterface
     {
         ctx->gatherStats(merged);
     }
+    virtual void recordStatistics(IStatisticGatherer &progress) const override
+    {
+        ctx->recordStatistics(progress);
+    }
     virtual bool collectingDetailedStatistics() const
     {
         return ctx->collectingDetailedStatistics();
@@ -1398,6 +1402,10 @@ class CRoxieServerActivity : implements CInterfaceOf<IRoxieServerActivity>, impl
     {
         return stats;
     }
+    virtual void recordStatistics(IStatisticGatherer &progress) const
+    {
+        stats.recordStatistics(progress, false);
+    }
     virtual bool isPassThrough()
     {
         return false;
diff --git a/system/jhtree/jhtree.cpp b/system/jhtree/jhtree.cpp
index 22daf58860a..d1cc840d080 100644
--- a/system/jhtree/jhtree.cpp
+++ b/system/jhtree/jhtree.cpp
@@ -390,31 +390,11 @@ class jhtree_decl CKeyLevelManager : implements IKeyManager, public CInterface
         return keyCursor ? 1 : 0;
     }
 
-    virtual unsigned querySeeks() const
-    {
-        return stats.seeks;
-    }
-
-    virtual unsigned queryScans() const
-    {
-        return stats.scans;
-    }
-
-    virtual unsigned querySkips() const
-    {
-        return stats.skips;
-    }
-
     virtual void resetCounts()
     {
         stats.reset();
     }
 
-    virtual unsigned queryWildSeeks() const
-    {
-        return stats.wildseeks;
-    }
-
     void setKey(IKeyIndexBase * _key)
     {
         ::Release(keyCursor);
@@ -1525,7 +1505,6 @@ bool CKeyIndex::prewarmPage(offset_t offset, NodeType type)
 const CJHSearchNode *CKeyIndex::locateFirstLeafNode(KeyStatsCollector &stats) const
 {
     keySeeks++;
-    stats.seeks++;
 
     offset_t leafOffset = keyHdr->getFirstLeafPos();
     if (leafOffset != (offset_t)-1)
@@ -1556,7 +1535,7 @@ const CJHSearchNode *CKeyIndex::locateFirstLeafNode(KeyStatsCollector &stats) co
 const CJHSearchNode *CKeyIndex::locateLastLeafNode(KeyStatsCollector &stats) const
 {
     keySeeks++;
-    stats.seeks++;
+    stats.noteSeeks(1, 0, 0);
 
     //Unusual - an index with no elements
     if (keyHdr->getNumRecords() == 0)
@@ -1588,9 +1567,6 @@ const CJHSearchNode *CKeyIndex::locateLastLeafNode(KeyStatsCollector &stats) con
 
 void KeyStatsCollector::noteSeeks(unsigned lseeks, unsigned lscans, unsigned lwildseeks)
 {
-    seeks += lseeks;
-    scans += lscans;
-    wildseeks += lwildseeks;
     if (ctx)
     {
         if (lseeks) ctx->noteStatistic(StNumIndexSeeks, lseeks);
@@ -1601,7 +1577,6 @@ void KeyStatsCollector::noteSeeks(unsigned lseeks, unsigned lscans, unsigned lwi
 
 void KeyStatsCollector::noteSkips(unsigned lskips, unsigned lnullSkips)
 {
-    skips += lskips;
     if (ctx)
     {
         if (lskips) ctx->noteStatistic(StNumIndexSkips, lskips);
@@ -1611,11 +1586,6 @@ void KeyStatsCollector::noteSkips(unsigned lskips, unsigned lnullSkips)
 
 void KeyStatsCollector::reset()
 {
-    seeks = 0;
-    scans = 0;
-    wildseeks = 0;
-    skips = 0;
-    nullskips = 0;
 }
 
 CKeyCursor::CKeyCursor(CKeyIndex &_key, const IIndexFilterList *_filter, bool _logExcessiveSeeks)
@@ -2016,7 +1986,18 @@ bool CKeyCursor::lookupSkip(const void *seek, size32_t seekOffset, size32_t seek
         {
             recstr.appendf("%02x ", ((unsigned char *) recordBuffer)[i]);
         }
-        DBGLOG("SKIP: Got skips=%02d seeks=%02d scans=%02d : %s", stats.skips, stats.seeks, stats.scans, recstr.str());
+        if (stats.ctx)
+        {
+            const CRuntimeStatisticCollection &statsCollection = stats.ctx->queryStats();
+            unsigned __int64 seeks = statsCollection.getStatisticValue(StNumIndexSeeks);
+            unsigned __int64 scans = statsCollection.getStatisticValue(StNumIndexScans);
+            unsigned __int64 skips = statsCollection.getStatisticValue(StNumIndexSkips);
+            DBGLOG("SKIP: Got skips=%" I64F "u seeks=%" I64F "u scans=%" I64F "u : %s", skips, seeks, scans, recstr.str());
+        }
+        else
+        {
+            DBGLOG("SKIP: (no ContextLogger - not tracking stats) : %s", recstr.str());
+        }
     }
 #endif
     return ret;
@@ -2980,7 +2961,18 @@ class CKeyMerger : public CKeyLevelManager
                         {
                             recstr.appendf("%02x ", ((unsigned char *) keyBuffer)[i]);
                         }
-                        DBGLOG("SKIP: Out skips=%02d seeks=%02d scans=%02d : %s", stats.skips, stats.seeks, stats.scans, recstr.str());
+                        if (stats.ctx)
+                        {
+                            const CRuntimeStatisticCollection &statsCollection = stats.ctx->queryStats();
+                            unsigned __int64 seeks = statsCollection.getStatisticValue(StNumIndexSeeks);
+                            unsigned __int64 scans = statsCollection.getStatisticValue(StNumIndexScans);
+                            unsigned __int64 skips = statsCollection.getStatisticValue(StNumIndexSkips);
+                            DBGLOG("SKIP: Out skips=%" I64F "u seeks=%" I64F "u scans=%" I64F "u : %s", skips, seeks, scans, recstr.str());
+                        }
+                        else
+                        {
+                            DBGLOG("SKIP: (no ContextLogger - not tracking stats) : %s", recstr.str());
+                        }
                     }
 #endif
                     if (stats.ctx)
@@ -3352,10 +3344,6 @@ extern jhtree_decl IIndexLookup *createIndexLookup(IKeyManager *keyManager)
             else
                 return nullptr;
         }
-        virtual unsigned querySeeks() const override { return keyManager->querySeeks(); }
-        virtual unsigned queryScans() const override { return keyManager->queryScans(); }
-        virtual unsigned querySkips() const override { return keyManager->querySkips(); }
-        virtual unsigned queryWildSeeks() const override { return keyManager->queryWildSeeks(); }
     };
     return new CIndexLookup(keyManager);
 }
diff --git a/system/jhtree/jhtree.hpp b/system/jhtree/jhtree.hpp
index 9338cc85278..32aca365da0 100644
--- a/system/jhtree/jhtree.hpp
+++ b/system/jhtree/jhtree.hpp
@@ -45,11 +45,6 @@ class KeyStatsCollector
 {
 public:
     IContextLogger *ctx;
-    unsigned seeks = 0;
-    unsigned scans = 0;
-    unsigned wildseeks = 0;
-    unsigned skips = 0;
-    unsigned nullskips = 0;
 
     KeyStatsCollector(IContextLogger *_ctx) : ctx(_ctx) {}
     void reset();
@@ -258,10 +253,6 @@ interface IIndexLookup : extends IInterface // similar to a small subset of IKey
     virtual const void *nextKey() = 0;
     virtual unsigned __int64 getCount() = 0;
     virtual unsigned __int64 checkCount(unsigned __int64 limit) = 0;
-    virtual unsigned querySeeks() const = 0;
-    virtual unsigned queryScans() const = 0;
-    virtual unsigned querySkips() const = 0;
-    virtual unsigned queryWildSeeks() const = 0;
 };
 
 interface IKeyManager : public IInterface, extends IIndexReadContext
@@ -283,10 +274,6 @@ interface IKeyManager : public IInterface, extends IIndexReadContext
     virtual unsigned __int64 checkCount(unsigned __int64 limit) = 0;
     virtual void serializeCursorPos(MemoryBuffer &mb) = 0;
     virtual void deserializeCursorPos(MemoryBuffer &mb) = 0;
-    virtual unsigned querySeeks() const = 0;
-    virtual unsigned queryScans() const = 0;
-    virtual unsigned querySkips() const = 0;
-    virtual unsigned queryWildSeeks() const = 0;
     virtual const byte *loadBlob(unsigned __int64 blobid, size32_t &blobsize, IContextLogger *ctx) = 0;
     virtual void releaseBlobs() = 0;
     virtual void resetCounts() = 0;
diff --git a/system/jlib/jlog.cpp b/system/jlib/jlog.cpp
index 8e44015fb6d..507cc5b7ff8 100644
--- a/system/jlib/jlog.cpp
+++ b/system/jlib/jlog.cpp
@@ -2776,7 +2776,7 @@ void IContextLogger::CTXLOG(const char *format, ...) const
 {
     va_list args;
     va_start(args, format);
-    CTXLOGva(MCdebugInfo, unknownJob, NoLogMsgCode, format, args);
+    CTXLOGva(MCdebugInfo, queryJob(), NoLogMsgCode, format, args);
     va_end(args);
 }
 
@@ -2848,7 +2848,7 @@ class DummyLogCtx : implements IContextLogger
             E->errorMessage(ss.append(": "));
         if (format)
             ss.append(": ").valist_appendf(format, args);
-        LOG(MCoperatorProgress, unknownJob, "%s", ss.str());
+        LOG(MCoperatorProgress, queryJob(), "%s", ss.str());
     }
     virtual void noteStatistic(StatisticKind kind, unsigned __int64 value) const
     {
@@ -2899,6 +2899,10 @@ class DummyLogCtx : implements IContextLogger
     {
         throwUnexpected();
     }
+    virtual void recordStatistics(IStatisticGatherer &progress) const override
+    {
+        throwUnexpected();
+    }
 } dummyContextLogger;
 
 extern jlib_decl const IContextLogger &queryDummyContextLogger()
diff --git a/system/jlib/jlog.hpp b/system/jlib/jlog.hpp
index cfb7692af02..f42e8ae62d8 100644
--- a/system/jlib/jlog.hpp
+++ b/system/jlib/jlog.hpp
@@ -1262,6 +1262,8 @@ interface jlib_decl IContextLogger : extends IInterface
     virtual void setCallerId(const char *id) = 0;
     virtual const char *queryCallerId() const = 0;
     virtual const CRuntimeStatisticCollection & queryStats() const = 0;
+    virtual void recordStatistics(IStatisticGatherer &progress) const = 0;
+    virtual const LogMsgJobInfo & queryJob() const { return unknownJob; }
 };
 
 extern jlib_decl StringBuffer &appendGloballyUniqueId(StringBuffer &s);
diff --git a/system/jlib/jstats.cpp b/system/jlib/jstats.cpp
index 79d2944334d..8ebcdcadef5 100644
--- a/system/jlib/jstats.cpp
+++ b/system/jlib/jstats.cpp
@@ -1319,6 +1319,11 @@ bool StatisticsMapping::equals(const StatisticsMapping & other)
 }
 
 const StatisticsMapping noStatistics({});
+const StatisticsMapping jhtreeCacheStatistics({ StNumIndexSeeks, StNumIndexScans, StNumPostFiltered, StNumIndexWildSeeks,
+                                                StNumNodeCacheAdds, StNumLeafCacheAdds, StNumBlobCacheAdds, StNumNodeCacheHits, StNumLeafCacheHits, StNumBlobCacheHits, StCycleNodeLoadCycles, StCycleLeafLoadCycles,
+                                                StCycleBlobLoadCycles, StCycleNodeReadCycles, StCycleLeafReadCycles, StCycleBlobReadCycles, StNumNodeDiskFetches, StNumLeafDiskFetches, StNumBlobDiskFetches,
+                                                StCycleNodeFetchCycles, StCycleLeafFetchCycles, StCycleBlobFetchCycles});
+
 const StatisticsMapping allStatistics(StKindAll);
 const StatisticsMapping heapStatistics({StNumAllocations, StNumAllocationScans});
 const StatisticsMapping diskLocalStatistics({StCycleDiskReadIOCycles, StSizeDiskRead, StNumDiskReads, StCycleDiskWriteIOCycles, StSizeDiskWrite, StNumDiskWrites, StNumDiskRetries});
diff --git a/system/jlib/jstats.h b/system/jlib/jstats.h
index 5a278dce8e8..24c2d3674e7 100644
--- a/system/jlib/jstats.h
+++ b/system/jlib/jstats.h
@@ -531,7 +531,6 @@ class jlib_decl CRuntimeStatistic
     RelaxedAtomic<unsigned __int64> value;
 };
 
-interface IContextLogger;
 class CNestedRuntimeStatisticMap;
 
 //The CRuntimeStatisticCollection  used to gather statistics for an activity - it has no notion of its scope, but can contain nested scopes.
@@ -944,4 +943,6 @@ class jlib_decl RuntimeStatisticTarget : implements IStatisticTarget
 extern jlib_decl StringBuffer & formatMoney(StringBuffer &out, unsigned __int64 value);
 extern jlib_decl stat_type aggregateStatistic(StatisticKind kind, IStatisticCollection * statsCollection);
 
+extern jlib_decl const StatisticsMapping jhtreeCacheStatistics;
+
 #endif
diff --git a/system/jlib/jtrace.hpp b/system/jlib/jtrace.hpp
index cf8d7e99630..50374d29e56 100644
--- a/system/jlib/jtrace.hpp
+++ b/system/jlib/jtrace.hpp
@@ -235,7 +235,7 @@ extern jlib_decl TraceFlags loadTraceFlags(const IPropertyTree * globals, const
 
 
 // Temporarily modify the trace context and/or flags for the current thread, for the lifetime of the LogContextScope object
-
+interface IContextLogger;
 class jlib_decl LogContextScope
 {
 public:
diff --git a/thorlcr/activities/hashdistrib/thhashdistribslave.cpp b/thorlcr/activities/hashdistrib/thhashdistribslave.cpp
index 567a270b6db..31c15b4ecc1 100644
--- a/thorlcr/activities/hashdistrib/thhashdistribslave.cpp
+++ b/thorlcr/activities/hashdistrib/thhashdistribslave.cpp
@@ -2454,7 +2454,7 @@ class ReDistributeSlaveActivity : public HashDistributeSlaveActivity
 class IndexDistributeSlaveActivity : public HashDistributeSlaveBase
 {
     typedef HashDistributeSlaveBase PARENT;
-    CThorContextLogger contextLogger;
+    CStatsContextLogger contextLogger;
     CStatsCtxLoggerDeltaUpdater statsUpdater;
 
     class CKeyLookup : implements IHash
@@ -2487,7 +2487,7 @@ class IndexDistributeSlaveActivity : public HashDistributeSlaveBase
     } *lookup;
 
 public:
-    IndexDistributeSlaveActivity(CGraphElementBase *container) : PARENT(container, indexDistribActivityStatistics), lookup(NULL), contextLogger(jhtreeCacheStatistics), statsUpdater(jhtreeCacheStatistics, *this, contextLogger)
+    IndexDistributeSlaveActivity(CGraphElementBase *container) : PARENT(container, indexDistribActivityStatistics), lookup(NULL), contextLogger(jhtreeCacheStatistics, thorJob), statsUpdater(jhtreeCacheStatistics, *this, contextLogger)
     {
     }
     ~IndexDistributeSlaveActivity()
diff --git a/thorlcr/activities/indexread/thindexreadslave.cpp b/thorlcr/activities/indexread/thindexreadslave.cpp
index 26f06cfd2c5..b4c7d0cd7cc 100644
--- a/thorlcr/activities/indexread/thindexreadslave.cpp
+++ b/thorlcr/activities/indexread/thindexreadslave.cpp
@@ -78,7 +78,7 @@ class CIndexReadSlaveBase : public CSlaveActivity
     Owned<IFileIO> lazyIFileIO;
     mutable CriticalSection ioStatsCS;
     unsigned fileTableStart = NotFound;
-    CThorContextLogger contextLogger;
+    CStatsContextLogger contextLogger;
     CStatsCtxLoggerDeltaUpdater statsUpdater;
 
     class TransformCallback : implements IThorIndexCallback , public CSimpleInterface
@@ -528,8 +528,7 @@ class CIndexReadSlaveBase : public CSlaveActivity
     }
 public:
     CIndexReadSlaveBase(CGraphElementBase *container)
-        : CSlaveActivity(container, indexReadActivityStatistics), callback(*this),
-          contextLogger(jhtreeCacheStatistics), statsUpdater(jhtreeCacheStatistics, *this, contextLogger)
+        : CSlaveActivity(container, indexReadActivityStatistics), callback(*this), contextLogger(jhtreeCacheStatistics, thorJob), statsUpdater(jhtreeCacheStatistics, *this, contextLogger)
     {
         helper = (IHThorIndexReadBaseArg *)container->queryHelper();
         limitTransformExtra = nullptr;
diff --git a/thorlcr/activities/keyedjoin/thkeyedjoinslave-legacy.cpp b/thorlcr/activities/keyedjoin/thkeyedjoinslave-legacy.cpp
index ecc0fe24159..481abecda01 100644
--- a/thorlcr/activities/keyedjoin/thkeyedjoinslave-legacy.cpp
+++ b/thorlcr/activities/keyedjoin/thkeyedjoinslave-legacy.cpp
@@ -1206,7 +1206,7 @@ class CKeyedJoinSlave : public CSlaveActivity, implements IJoinProcessor, implem
         unsigned candidateCount;
         __int64 lastSeeks, lastScans;
         IConstPointerArrayOf<ITranslator> translators;
-        CThorContextLogger contextLogger;
+        CStatsContextLogger contextLogger;
 
         inline void updateJhTreeStats()
         {
@@ -1253,7 +1253,7 @@ class CKeyedJoinSlave : public CSlaveActivity, implements IJoinProcessor, implem
     public:
         IMPLEMENT_IINTERFACE_USING(CSimpleInterface);
 
-        CKeyLocalLookup(CKeyedJoinSlave &_owner, const RtlRecord &_keyRecInfo) : owner(_owner), keyRecInfo(_keyRecInfo), indexReadFieldsRow(_owner.indexInputAllocator), contextLogger(jhtreeCacheStatistics)
+        CKeyLocalLookup(CKeyedJoinSlave &_owner, const RtlRecord &_keyRecInfo) : owner(_owner), keyRecInfo(_keyRecInfo), indexReadFieldsRow(_owner.indexInputAllocator), contextLogger(jhtreeCacheStatistics, thorJob)
         {
             tlkManager.setown(owner.keyHasTlk ? createLocalKeyManager(keyRecInfo, nullptr, &contextLogger, owner.helper->hasNewSegmentMonitors(), false) : nullptr);
             reset();
@@ -1363,7 +1363,7 @@ class CKeyedJoinSlave : public CSlaveActivity, implements IJoinProcessor, implem
                             ++candidateCount;
                             if (candidateCount > owner.atMost)
                                 break;
-                            KLBlobProviderAdapter adapter(partManager, & contextLogger);
+                            KLBlobProviderAdapter adapter(partManager, &contextLogger);
                             byte const * keyRow = partManager->queryKeyBuffer();
                             size_t fposOffset = partManager->queryRowSize() - sizeof(offset_t);
                             offset_t fpos = rtlReadBigUInt8(keyRow + fposOffset);
diff --git a/thorlcr/activities/keyedjoin/thkeyedjoinslave.cpp b/thorlcr/activities/keyedjoin/thkeyedjoinslave.cpp
index 72422294d1d..e9903b4ecb4 100644
--- a/thorlcr/activities/keyedjoin/thkeyedjoinslave.cpp
+++ b/thorlcr/activities/keyedjoin/thkeyedjoinslave.cpp
@@ -2222,7 +2222,7 @@ class CKeyedJoinSlave : public CSlaveActivity, implements IJoinProcessor, implem
     CPartDescriptorArray allIndexParts;
     std::vector<unsigned> localIndexParts, localFetchPartMap;
     IArrayOf<IKeyIndex> tlkKeyIndexes;
-    CThorContextLogger contextLogger;
+    CStatsContextLogger contextLogger;
     CStatsCtxLoggerDeltaUpdater statsUpdater;
     Owned<IEngineRowAllocator> joinFieldsAllocator;
     OwnedConstThorRow defaultRight;
@@ -2938,8 +2938,7 @@ class CKeyedJoinSlave : public CSlaveActivity, implements IJoinProcessor, implem
 public:
     IMPLEMENT_IINTERFACE_USING(PARENT);
 
-    CKeyedJoinSlave(CGraphElementBase *_container) : PARENT(_container, keyedJoinActivityStatistics),
-        readAheadThread(*this), contextLogger(jhtreeCacheStatistics), statsUpdater(jhtreeCacheStatistics, *this, contextLogger)
+    CKeyedJoinSlave(CGraphElementBase *_container) : PARENT(_container, keyedJoinActivityStatistics), readAheadThread(*this), contextLogger(jhtreeCacheStatistics, thorJob), statsUpdater(jhtreeCacheStatistics, *this, contextLogger)
     {
         helper = static_cast <IHThorKeyedJoinArg *> (queryHelper());
         reInit = 0 != (helper->getFetchFlags() & (FFvarfilename|FFdynamicfilename)) || (helper->getJoinFlags() & JFvarindexfilename);
diff --git a/thorlcr/graph/thgraphslave.hpp b/thorlcr/graph/thgraphslave.hpp
index b21a75dd96d..5540b72c032 100644
--- a/thorlcr/graph/thgraphslave.hpp
+++ b/thorlcr/graph/thgraphslave.hpp
@@ -334,10 +334,10 @@ class CStatsCtxLoggerDeltaUpdater : public CStatsDeltaUpdater
 {
 protected:
     CSlaveActivity &activity;
-    CThorContextLogger &ctxLogger;
+    CStatsContextLogger &ctxLogger;
 
 public:
-    inline CStatsCtxLoggerDeltaUpdater(const StatisticsMapping &mapping, CSlaveActivity &_activity, CThorContextLogger &_ctxLogger, unsigned timeThresholdSecs=0)
+    inline CStatsCtxLoggerDeltaUpdater(const StatisticsMapping &mapping, CSlaveActivity &_activity, CStatsContextLogger &_ctxLogger, unsigned timeThresholdSecs=0)
         : CStatsDeltaUpdater(mapping, timeThresholdSecs), activity(_activity), ctxLogger(_ctxLogger)
     {
         resetStart();
diff --git a/thorlcr/slave/slavmain.cpp b/thorlcr/slave/slavmain.cpp
index 7ba4bf21838..ee527a21401 100644
--- a/thorlcr/slave/slavmain.cpp
+++ b/thorlcr/slave/slavmain.cpp
@@ -115,7 +115,7 @@ class CKJService : public CSimpleInterfaceOf<IKJService>, implements IThreaded,
     unsigned maxCachedKJManagers = defaultMaxCachedKJManagers;
     unsigned maxCachedFetchContexts = defaultMaxCachedFetchContexts;
     unsigned keyLookupMaxProcessThreads = defaultKeyLookupMaxProcessThreads;
-    CThorContextLogger contextLogger;
+    CStatsContextLogger contextLogger;
     class CLookupKey
     {
         unsigned hashv = 0;
@@ -1189,7 +1189,7 @@ class CKJService : public CSimpleInterfaceOf<IKJService>, implements IThreaded,
 public:
     IMPLEMENT_IINTERFACE_USING(CSimpleInterfaceOf<IKJService>);
 
-    CKJService(mptag_t _mpTag) : threaded("CKJService", this), keyLookupMpTag(_mpTag), contextLogger(jhtreeCacheStatistics)
+    CKJService(mptag_t _mpTag) : threaded("CKJService", this), keyLookupMpTag(_mpTag), contextLogger(jhtreeCacheStatistics, thorJob)
     {
         setupProcessorPool();
     }
diff --git a/thorlcr/thorutil/thormisc.cpp b/thorlcr/thorutil/thormisc.cpp
index df7463f4ec7..9ecd6b2e97b 100644
--- a/thorlcr/thorutil/thormisc.cpp
+++ b/thorlcr/thorutil/thormisc.cpp
@@ -74,16 +74,7 @@ static Owned<IMPtagAllocator> ClusterMPAllocator;
 
 // stat. mappings shared between master and slave activities
 const StatisticsMapping spillStatistics({StTimeSpillElapsed, StTimeSortElapsed, StNumSpills, StSizeSpillFile});
-const StatisticsMapping jhtreeCacheStatistics({ StNumIndexSeeks, StNumIndexScans, StNumPostFiltered, StNumIndexWildSeeks,
-                                                StNumNodeCacheAdds, StNumLeafCacheAdds, StNumBlobCacheAdds, StNumNodeCacheHits, StNumLeafCacheHits, StNumBlobCacheHits,
-                                                StNumNodeDiskFetches, StNumLeafDiskFetches, StNumBlobDiskFetches,
-                                                StTimeNodeRead, StCycleNodeReadCycles, StTimeLeafRead, StCycleLeafReadCycles, StTimeBlobRead, StCycleBlobReadCycles,
-                                                StTimeNodeFetch, StCycleNodeFetchCycles, StTimeLeafFetch, StCycleLeafFetchCycles, StTimeBlobFetch, StCycleBlobFetchCycles,
-                                                StTimeIndexCacheBlocked, StCycleIndexCacheBlockedCycles, StNumIndexMerges, StNumIndexMergeCompares,
-                                                StTimeBlobLoad, StCycleBlobLoadCycles, StTimeLeafLoad, StCycleLeafLoadCycles, StTimeNodeLoad, StCycleNodeLoadCycles,
-                                                StNumIndexSkips, StNumIndexNullSkips});
 const StatisticsMapping soapcallStatistics({StTimeSoapcall});
-
 const StatisticsMapping basicActivityStatistics({StTimeTotalExecute, StTimeLocalExecute, StTimeBlocked});
 const StatisticsMapping groupActivityStatistics({StNumGroups, StNumGroupMax}, basicActivityStatistics);
 const StatisticsMapping hashJoinActivityStatistics({StNumLeftRows, StNumRightRows}, basicActivityStatistics);
diff --git a/thorlcr/thorutil/thormisc.hpp b/thorlcr/thorutil/thormisc.hpp
index 895c325164d..1d99832cfa4 100644
--- a/thorlcr/thorutil/thormisc.hpp
+++ b/thorlcr/thorutil/thormisc.hpp
@@ -131,7 +131,6 @@ enum RegistryCode:unsigned { rc_register, rc_deregister };
 #define destroyThorRow(ptr)         free(ptr)
 #define reallocThorRow(ptr, size)   realloc(ptr, size)
 
-
 //statistics gathered by the different activities
 extern graph_decl const StatisticsMapping spillStatistics;
 extern graph_decl const StatisticsMapping jhtreeCacheStatistics;
@@ -605,108 +604,6 @@ inline void readUnderlyingType(MemoryBuffer &mb, T &v)
 constexpr unsigned thorDetailedLogLevel = 200;
 constexpr LogMsgCategory MCthorDetailedDebugInfo(MCdebugInfo(thorDetailedLogLevel));
 
-////
-// IContextLogger
-class CThorContextLogger : public CSimpleInterfaceOf<IContextLogger>
-{
-    unsigned traceLevel = 1;
-    LogTrace logTrace;
-    mutable CRuntimeStatisticCollection stats;
-
-public:
-    CThorContextLogger(const StatisticsMapping & statsMapping) : stats(statsMapping)
-    {
-        if (globals->hasProp("@httpGlobalIdHeader"))
-            setHttpIdHeaderNames(globals->queryProp("@httpGlobalIdHeader"), globals->queryProp("@httpCallerIdHeader"));
-    }
-    virtual void CTXLOG(const char *format, ...) const override  __attribute__((format(printf,2,3)))
-    {
-        va_list args;
-        va_start(args, format);
-        CTXLOGva(MCdebugProgress, thorJob, NoLogMsgCode, format, args);
-        va_end(args);
-    }
-
-    virtual void CTXLOGva(const LogMsgCategory & cat, const LogMsgJobInfo & job, LogMsgCode code, const char *format, va_list args) const override  __attribute__((format(printf,5,0))) 
-    {
-        VALOG(cat, job, code, format, args);
-    }
-    virtual void logOperatorExceptionVA(IException *E, const char *file, unsigned line, const char *format, va_list args) const __attribute__((format(printf,5,0)))
-    {
-        StringBuffer ss;
-        ss.append("ERROR");
-        if (E)
-            ss.append(": ").append(E->errorCode());
-        if (file)
-            ss.appendf(": %s(%d) ", file, line);
-        if (E)
-            E->errorMessage(ss.append(": "));
-        if (format)
-            ss.append(": ").valist_appendf(format, args);
-        LOG(MCoperatorProgress, thorJob, "%s", ss.str());
-    }
-    virtual void noteStatistic(StatisticKind kind, unsigned __int64 value) const override
-    {
-        stats.addStatisticAtomic(kind, value);
-    }
-    virtual void setStatistic(StatisticKind kind, unsigned __int64 value) const override
-    {
-        stats.setStatistic(kind, value);
-    }
-    virtual void mergeStats(const CRuntimeStatisticCollection &from) const override
-    {
-        stats.merge(from);
-    }
-    virtual unsigned queryTraceLevel() const override
-    {
-        return traceLevel;
-    }
-    virtual void setGlobalId(const char *id, SocketEndpoint &ep, unsigned pid) override
-    {
-        logTrace.setGlobalId(id);
-    }
-    virtual void setCallerId(const char *id) override
-    {
-        logTrace.setCallerId(id);
-    }
-    virtual const char *queryGlobalId() const override
-    {
-        return logTrace.queryGlobalId();
-    }
-    virtual const char *queryLocalId() const override
-    {
-        return logTrace.queryLocalId();
-    }
-    virtual const char *queryCallerId() const override
-    {
-        return logTrace.queryCallerId();
-    }
-    virtual void setHttpIdHeaderNames(const char *global, const char *caller) override
-    {
-        logTrace.setHttpIdHeaderNames(global, caller);
-    }
-    virtual const char *queryGlobalIdHttpHeaderName() const override
-    {
-        return logTrace.queryGlobalIdHTTPHeaderName();
-    }
-    virtual const char *queryCallerIdHttpHeaderName() const override
-    {
-        return logTrace.queryCallerIdHTTPHeaderName();
-    }
-    virtual const CRuntimeStatisticCollection &queryStats() const override
-    {
-        return stats;
-    }
-    void updateStatsDeltaTo(CRuntimeStatisticCollection &to, CRuntimeStatisticCollection &previous)
-    {
-        previous.updateDelta(to, stats);
-    }
-    void reset()
-    {
-        stats.reset();
-    }
-};
-
 class graph_decl CThorPerfTracer : protected PerfTracer
 {
     PerfTracer perf;