Merge pull request #131135 from cockroachdb/blathers/backport-release…

…-24.2-131038

release-24.2: crosscluster/physical: use correct lag replan cluster setting

pkg/ccl/crosscluster/physical/stream_ingestion_frontier_processor.go

@@ -423,11 +423,7 @@ func (sf *streamIngestionFrontier) maybePersistFrontierEntries() error {
 
 func (sf *streamIngestionFrontier) maybeCheckForLaggingNodes() error {
 	ctx := sf.Ctx()
-
-	// We halve the frequency relative to the ReplanFrequency setting (i.e.
-	// check twice as often), because the node lag checker will only restart the
-	// distSQL plan if a node is lagging for 2 checks in a row.
-	checkFreq := crosscluster.ReplanFrequency.Get(&sf.FlowCtx.Cfg.Settings.SV) / 2
+	checkFreq := crosscluster.LagCheckFrequency.Get(&sf.FlowCtx.Cfg.Settings.SV)
 	maxLag := crosscluster.InterNodeLag.Get(&sf.FlowCtx.Cfg.Settings.SV)
 	if sf.persistedReplicatedTime.IsEmpty() {
 		log.VEvent(ctx, 2, "skipping lag replanning check: no persisted replicated time")