Add sampling.tail.ttl to sample yml (#16579) (#17030)

Add sampling.tail.ttl to apm-server.yml and other yml.

(cherry picked from commit f17356b)

Co-authored-by: Carson Ip <[email protected]>

Author: mergify[bot]

apm-server-fips.yml

@@ -285,6 +285,10 @@ apm-server:
     # Synchronization interval for multiple APM Servers. Should be in the order of tens of seconds or low minutes.
     #interval: 1m
 
+    # TTL determines how long trace events are retained in the local storage while waiting for a sampling decision to be made.
+    # A greater TTL value increases storage space requirements. Should be at least 2 * interval.
+    #ttl: 30m
+
     # Criteria used to match a root transaction to a sample rate.
     #policies: []
 

apm-server.docker.yml

@@ -293,6 +293,10 @@ apm-server:
     # Synchronization interval for multiple APM Servers. Should be in the order of tens of seconds or low minutes.
     #interval: 1m
 
+    # TTL determines how long trace events are retained in the local storage while waiting for a sampling decision to be made.
+    # A greater TTL value increases storage space requirements. Should be at least 2 * interval.
+    #ttl: 30m
+
     # Criteria used to match a root transaction to a sample rate.
     #policies: []
 

apm-server.yml

@@ -293,6 +293,10 @@ apm-server:
     # Synchronization interval for multiple APM Servers. Should be in the order of tens of seconds or low minutes.
     #interval: 1m
 
+    # TTL determines how long trace events are retained in the local storage while waiting for a sampling decision to be made.
+    # A greater TTL value increases storage space requirements. Should be at least 2 * interval.
+    #ttl: 30m
+
     # Criteria used to match a root transaction to a sample rate.
     #policies: []