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Merge branch 'cassandra-4.1' into trunk 

* cassandra-4.1:
  Update G1GC settings, and make it default in trunk
This commit is contained in:
Mick Semb Wever 2023-01-20 13:13:54 +01:00
parent 45e00ea92f 7c86e18baf
commit 8413e9d6fd
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3 changed files with 38 additions and 33 deletions
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1
CHANGES.txt
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@ -1,4 +1,5 @@
4.2
* Use G1GC by default, and update default G1GC settings (CASSANDRA-18027)
* SimpleSeedProvider can resolve multiple IP addresses per DNS record (CASSANDRA-14361)
* Remove mocking in InternalNodeProbe spying on StorageServiceMBean (CASSANDRA-18152)
* Add compaction_properties column to system.compaction_history table and nodetool compactionhistory command (CASSANDRA-18061)

32
conf/jvm11-server.options
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@ -11,39 +11,41 @@
### CMS Settings
-XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled
-XX:SurvivorRatio=8
-XX:MaxTenuringThreshold=1
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly
-XX:CMSWaitDuration=10000
-XX:+CMSParallelInitialMarkEnabled
-XX:+CMSEdenChunksRecordAlways
##-XX:+UseConcMarkSweepGC
##-XX:+CMSParallelRemarkEnabled
##-XX:SurvivorRatio=8
##-XX:MaxTenuringThreshold=1
##-XX:CMSInitiatingOccupancyFraction=75
##-XX:+UseCMSInitiatingOccupancyOnly
##-XX:CMSWaitDuration=10000
##-XX:+CMSParallelInitialMarkEnabled
##-XX:+CMSEdenChunksRecordAlways
## some JVMs will fill up their heap when accessed via JMX, see CASSANDRA-6541
-XX:+CMSClassUnloadingEnabled
##-XX:+CMSClassUnloadingEnabled
### G1 Settings
## Use the Hotspot garbage-first collector.
#-XX:+UseG1GC
#-XX:+ParallelRefProcEnabled
-XX:+UseG1GC
-XX:+ParallelRefProcEnabled
-XX:MaxTenuringThreshold=1
-XX:G1HeapRegionSize=16m
#
## Have the JVM do less remembered set work during STW, instead
## preferring concurrent GC. Reduces p99.9 latency.
#-XX:G1RSetUpdatingPauseTimePercent=5
-XX:G1RSetUpdatingPauseTimePercent=5
#
## Main G1GC tunable: lowering the pause target will lower throughput and vise versa.
## 200ms is the JVM default and lowest viable setting
## 1000ms increases throughput. Keep it smaller than the timeouts in cassandra.yaml.
#-XX:MaxGCPauseMillis=500
-XX:MaxGCPauseMillis=300
## Optional G1 Settings
# Save CPU time on large (>= 16GB) heaps by delaying region scanning
# until the heap is 70% full. The default in Hotspot 8u40 is 40%.
#-XX:InitiatingHeapOccupancyPercent=70
-XX:InitiatingHeapOccupancyPercent=70
# For systems with > 8 cores, the default ParallelGCThreads is 5/8 the number of logical cores.
# Otherwise equal to the number of cores when 8 or less.

38
conf/jvm8-server.options
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@ -18,38 +18,40 @@
#################
### CMS Settings
-XX:+UseParNewGC
-XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled
-XX:SurvivorRatio=8
-XX:MaxTenuringThreshold=1
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly
-XX:CMSWaitDuration=10000
-XX:+CMSParallelInitialMarkEnabled
-XX:+CMSEdenChunksRecordAlways
##-XX:+UseParNewGC
##-XX:+UseConcMarkSweepGC
##-XX:+CMSParallelRemarkEnabled
##-XX:SurvivorRatio=8
##-XX:MaxTenuringThreshold=1
##-XX:CMSInitiatingOccupancyFraction=75
##-XX:+UseCMSInitiatingOccupancyOnly
##-XX:CMSWaitDuration=10000
##-XX:+CMSParallelInitialMarkEnabled
##-XX:+CMSEdenChunksRecordAlways
## some JVMs will fill up their heap when accessed via JMX, see CASSANDRA-6541
-XX:+CMSClassUnloadingEnabled
##-XX:+CMSClassUnloadingEnabled
### G1 Settings
## Use the Hotspot garbage-first collector.
#-XX:+UseG1GC
#-XX:+ParallelRefProcEnabled
-XX:+UseG1GC
-XX:+ParallelRefProcEnabled
-XX:MaxTenuringThreshold=1
-XX:G1HeapRegionSize=16m
#
## Have the JVM do less remembered set work during STW, instead
## preferring concurrent GC. Reduces p99.9 latency.
#-XX:G1RSetUpdatingPauseTimePercent=5
#
-XX:G1RSetUpdatingPauseTimePercent=5
## Main G1GC tunable: lowering the pause target will lower throughput and vise versa.
## 200ms is the JVM default and lowest viable setting
## 1000ms increases throughput. Keep it smaller than the timeouts in cassandra.yaml.
#-XX:MaxGCPauseMillis=500
-XX:MaxGCPauseMillis=300
## Optional G1 Settings
# Save CPU time on large (>= 16GB) heaps by delaying region scanning
# until the heap is 70% full. The default in Hotspot 8u40 is 40%.
#-XX:InitiatingHeapOccupancyPercent=70
-XX:InitiatingHeapOccupancyPercent=70
# For systems with > 8 cores, the default ParallelGCThreads is 5/8 the number of logical cores.
# Otherwise equal to the number of cores when 8 or less.