mirror of https://github.com/apache/cassandra
Change default GC to G1
Patch by Al Tobey; reviewed by jmckenzie for CASSANDRA-7486
This commit is contained in:
Al Tobey
Josh McKenzie
parent
de0dcde6b7
commit
ea36ae9e8a
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@ -1,6 +1,7 @@
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3.0:
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* Decommissioned nodes will not rejoin the cluster (CASSANDRA-8801)
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* Change gossip stabilization to use endpoit size (CASSANDRA-9401)
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* Change default garbage collector to G1 (CASSANDRA-7486)
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2.2
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@ -128,22 +128,16 @@ Function CalculateHeapSizes
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}
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# Validate that we need to run this function and that our config is good
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if ($env:MAX_HEAP_SIZE -and $env:HEAP_NEWSIZE)
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if ($env:MAX_HEAP_SIZE)
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{
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return
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}
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if (($env:MAX_HEAP_SIZE -and !$env:HEAP_NEWSIZE) -or (!$env:MAX_HEAP_SIZE -and $env:HEAP_NEWSIZE))
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{
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echo "Please set or unset MAX_HEAP_SIZE and HEAP_NEWSIZE in pairs. Aborting startup."
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exit 1
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}
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$memObject = Get-WMIObject -class win32_physicalmemory
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if ($memObject -eq $null)
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{
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echo "WARNING! Could not determine system memory. Defaulting to 2G heap, 512M newgen. Manually override in conf\cassandra-env.ps1 for different heap values."
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echo "WARNING! Could not determine system memory. Defaulting to 2G heap. Manually override in conf\cassandra-env.ps1 for different heap values."
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$env:MAX_HEAP_SIZE = "2048M"
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$env:HEAP_NEWSIZE = "512M"
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return
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}
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@ -180,20 +174,6 @@ Function CalculateHeapSizes
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$maxHeapMB = $quarterMem
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}
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$env:MAX_HEAP_SIZE = [System.Convert]::ToString($maxHeapMB) + "M"
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# Young gen: min(max_sensible_per_modern_cpu_core * num_cores, 1/4
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$maxYGPerCore = 100
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$maxYGTotal = $maxYGPerCore * $systemCores
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$desiredYG = [Math]::Truncate($maxHeapMB / 4)
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if ($desiredYG -gt $maxYGTotal)
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{
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$env:HEAP_NEWSIZE = [System.Convert]::ToString($maxYGTotal) + "M"
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}
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else
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{
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$env:HEAP_NEWSIZE = [System.Convert]::ToString($desiredYG) + "M"
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}
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}
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#-----------------------------------------------------------------------------
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@ -205,31 +185,31 @@ Function SetJsr223Env
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foreach ($file in Get-ChildItem -Path "$env:CASSANDRA_HOME\lib\jsr223\$jsrDir\*.jar")
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{
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$file = $file -replace "\\", "/"
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$cp = $cp + ";" + """$file"""
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$cp = $cp + ";" + """$file"""
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}
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}
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$env:CLASSPATH=$cp
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# JSR223/JRuby - set ruby lib directory
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\jruby\ruby")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Djruby.lib=$env:CASSANDRA_HOME\lib\jsr223\jruby"
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}
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# JSR223/JRuby - set ruby JNI libraries root directory
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\jruby\jni")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Djffi.boot.library.path=$env:CASSANDRA_HOME\lib\jsr223\jruby\jni"
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}
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# JSR223/Jython - set python.home system property
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\jython\jython.jar")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Dpython.home=$env:CASSANDRA_HOME\lib\jsr223\jython"
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}
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# JSR223/Scala - necessary system property
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\scala\scala-compiler.jar")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Dscala.usejavacp=true"
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}
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# JSR223/JRuby - set ruby lib directory
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\jruby\ruby")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Djruby.lib=$env:CASSANDRA_HOME\lib\jsr223\jruby"
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}
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# JSR223/JRuby - set ruby JNI libraries root directory
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\jruby\jni")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Djffi.boot.library.path=$env:CASSANDRA_HOME\lib\jsr223\jruby\jni"
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}
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# JSR223/Jython - set python.home system property
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\jython\jython.jar")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Dpython.home=$env:CASSANDRA_HOME\lib\jsr223\jython"
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}
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# JSR223/Scala - necessary system property
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if (Test-Path "$env:CASSANDRA_HOME\lib\jsr223\scala\scala-compiler.jar")
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{
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$env:CASSANDRA_PARAMS=$env:CASSANDRA_PARAMS + " -Dscala.usejavacp=true"
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}
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}
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#-----------------------------------------------------------------------------
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@ -317,20 +297,9 @@ Function SetCassandraEnvironment
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# Override these to set the amount of memory to allocate to the JVM at
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# start-up. For production use you may wish to adjust this for your
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# environment. MAX_HEAP_SIZE is the total amount of memory dedicated
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# to the Java heap; HEAP_NEWSIZE refers to the size of the young
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# generation. Both MAX_HEAP_SIZE and HEAP_NEWSIZE should be either set
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# or not (if you set one, set the other).
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#
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# The main trade-off for the young generation is that the larger it
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# is, the longer GC pause times will be. The shorter it is, the more
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# expensive GC will be (usually).
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#
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# The example HEAP_NEWSIZE assumes a modern 8-core+ machine for decent
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# times. If in doubt, and if you do not particularly want to tweak, go
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# 100 MB per physical CPU core.
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# to the Java heap.
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#$env:MAX_HEAP_SIZE="4096M"
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#$env:HEAP_NEWSIZE="800M"
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CalculateHeapSizes
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ParseJVMInfo
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@ -357,9 +326,6 @@ Function SetCassandraEnvironment
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$env:JVM_OPTS = "$env:JVM_OPTS -Dlog4j.defaultInitOverride=true"
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# some JVMs will fill up their heap when accessed via JMX, see CASSANDRA-6541
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+CMSClassUnloadingEnabled"
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# enable thread priorities, primarily so we can give periodic tasks
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# a lower priority to avoid interfering with client workload
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseThreadPriorities"
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@ -372,7 +338,6 @@ Function SetCassandraEnvironment
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# stop-the-world GC pauses during resize.
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$env:JVM_OPTS="$env:JVM_OPTS -Xms$env:MAX_HEAP_SIZE"
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$env:JVM_OPTS="$env:JVM_OPTS -Xmx$env:MAX_HEAP_SIZE"
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$env:JVM_OPTS="$env:JVM_OPTS -Xmn$env:HEAP_NEWSIZE"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+HeapDumpOnOutOfMemoryError"
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# Per-thread stack size.
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@ -382,24 +347,41 @@ Function SetCassandraEnvironment
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$env:JVM_OPTS="$env:JVM_OPTS -XX:StringTableSize=1000003"
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# GC tuning options
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseParNewGC"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseConcMarkSweepGC"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+CMSParallelRemarkEnabled"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:SurvivorRatio=8"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:MaxTenuringThreshold=1"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:CMSInitiatingOccupancyFraction=75"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly"
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# Use the Hotspot garbage-first collector.
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseG1GC"
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# Have the JVM do less remembered set work during STW, instead
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# preferring concurrent GC. Reduces p99.9 latency.
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$env:JVM_OPTS="$env:JVM_OPTS -XX:G1RSetUpdatingPauseTimePercent=5"
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# The JVM maximum is 8 PGC threads and 1/4 of that for ConcGC.
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# Machines with > 10 cores may need additional threads. Increase to <= full cores.
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#$env:JVM_OPTS="$env:JVM_OPTS -XX:ParallelGCThreads=16"
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#$env:JVM_OPTS="$env:JVM_OPTS -XX:ConcGCThreads=16"
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# Main G1GC tunable: lowering the pause target will lower throughput and vise versa.
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# 200ms is the JVM default and lowest viable setting
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# 1000ms increases throughput. Keep it smaller than the timeouts in cassandra.yaml.
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$env:JVM_OPTS="$env:JVM_OPTS -XX:MaxGCPauseMillis=500"
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# Save CPU time on large (>= 16GB) heaps by delaying region scanning
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# until the heap is 70% full. The default in Hotspot 8u40 is 40%.
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#$env:JVM_OPTS="$env:JVM_OPTS -XX:InitiatingHeapOccupancyPercent=70"
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# Make sure all memory is faulted and zeroed on startup.
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# This helps prevent soft faults in containers and makes
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# transparent hugepage allocation more effective.
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#$env:JVM_OPTS="$env:JVM_OPTS -XX:+AlwaysPreTouch"
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# Biased locking does not benefit Cassandra.
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$env:JVM_OPTS="$env:JVM_OPTS -XX:-UseBiasedLocking"
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# Enable thread-local allocation blocks and allow the JVM to automatically
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# resize them at runtime.
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseTLAB -XX:+ResizeTLAB"
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# http://www.evanjones.ca/jvm-mmap-pause.html
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+PerfDisableSharedMem"
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseTLAB"
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if (($env:JVM_VERSION.CompareTo("1.7") -eq 1) -and ($env:JVM_ARCH -eq "64-Bit"))
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{
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+UseCondCardMark"
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}
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if ( (($env:JVM_VERSION.CompareTo("1.7") -ge 0) -and ($env:JVM_PATCH_VERSION.CompareTo("60") -ge 0)) -or
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($env:JVM_VERSION.CompareTo("1.8") -ge 0))
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{
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$env:JVM_OPTS="$env:JVM_OPTS -XX:+CMSParallelInitialMarkEnabled -XX:+CMSEdenChunksRecordAlways"
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}
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# GC logging options -- uncomment to enable
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# $env:JVM_OPTS="$env:JVM_OPTS -XX:+PrintGCDetails"
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@ -409,11 +391,6 @@ Function SetCassandraEnvironment
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# $env:JVM_OPTS="$env:JVM_OPTS -XX:+PrintGCApplicationStoppedTime"
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# $env:JVM_OPTS="$env:JVM_OPTS -XX:+PrintPromotionFailure"
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# $env:JVM_OPTS="$env:JVM_OPTS -XX:PrintFLSStatistics=1"
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# $currentDate = (Get-Date).ToString('yyyy.MM.dd')
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# $env:JVM_OPTS="$env:JVM_OPTS -Xloggc:$env:CASSANDRA_HOME/logs/gc-$currentDate.log"
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# If you are using JDK 6u34 7u2 or later you can enable GC log rotation
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# don't stick the date in the log name if rotation is on.
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# $env:JVM_OPTS="$env:JVM_OPTS -Xloggc:$env:CASSANDRA_HOME/logs/gc.log"
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# $env:JVM_OPTS="$env:JVM_OPTS -XX:+UseGCLogFileRotation"
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# $env:JVM_OPTS="$env:JVM_OPTS -XX:NumberOfGCLogFiles=10"
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@ -444,7 +421,7 @@ Function SetCassandraEnvironment
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#
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# Due to potential security exploits, Cassandra ships with JMX accessible
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# *only* from localhost. To enable remote JMX connections, uncomment lines below
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# with authentication and ssl enabled. See https://wiki.apache.org/cassandra/JmxSecurity
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# with authentication and ssl enabled. See https://wiki.apache.org/cassandra/JmxSecurity
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#
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#$env:JVM_OPTS="$env:JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT"
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#$env:JVM_OPTS="$env:JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
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@ -71,92 +71,40 @@ calculate_heap_sizes()
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max_heap_size_in_mb="$quarter_system_memory_in_mb"
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fi
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MAX_HEAP_SIZE="${max_heap_size_in_mb}M"
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# Young gen: min(max_sensible_per_modern_cpu_core * num_cores, 1/4 * heap size)
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max_sensible_yg_per_core_in_mb="100"
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max_sensible_yg_in_mb=`expr $max_sensible_yg_per_core_in_mb "*" $system_cpu_cores`
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desired_yg_in_mb=`expr $max_heap_size_in_mb / 4`
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if [ "$desired_yg_in_mb" -gt "$max_sensible_yg_in_mb" ]
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then
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HEAP_NEWSIZE="${max_sensible_yg_in_mb}M"
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else
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HEAP_NEWSIZE="${desired_yg_in_mb}M"
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fi
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}
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# Determine the sort of JVM we'll be running on.
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java_ver_output=`"${JAVA:-java}" -version 2>&1`
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jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print $2}'`
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JVM_VERSION=${jvmver%_*}
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JVM_PATCH_VERSION=${jvmver#*_}
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if [ "$JVM_VERSION" \< "1.7" ] ; then
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echo "Cassandra 2.0 and later require Java 7u25 or later."
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if [ "$JVM_VERSION" \< "1.8" ] ; then
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echo "Cassandra 3.0 and later require Java 8u20 or later."
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exit 1;
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fi
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if [ "$JVM_VERSION" \< "1.8" ] && [ "$JVM_PATCH_VERSION" \< "25" ] ; then
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echo "Cassandra 2.0 and later require Java 7u25 or later."
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if [ "$JVM_VERSION" \< "1.8" ] && [ "$JVM_PATCH_VERSION" \< "20" ] ; then
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echo "Cassandra 3.0 and later require Java 8u20 or later."
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exit 1;
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fi
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jvm=`echo "$java_ver_output" | grep -A 1 'java version' | awk 'NR==2 {print $1}'`
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case "$jvm" in
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OpenJDK)
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JVM_VENDOR=OpenJDK
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# this will be "64-Bit" or "32-Bit"
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JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $2}'`
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;;
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"Java(TM)")
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JVM_VENDOR=Oracle
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# this will be "64-Bit" or "32-Bit"
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JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $3}'`
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;;
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*)
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# Help fill in other JVM values
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JVM_VENDOR=other
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JVM_ARCH=unknown
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;;
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esac
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# Override these to set the amount of memory to allocate to the JVM at
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# start-up. For production use you may wish to adjust this for your
|
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# environment. MAX_HEAP_SIZE is the total amount of memory dedicated
|
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# to the Java heap; HEAP_NEWSIZE refers to the size of the young
|
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# generation. Both MAX_HEAP_SIZE and HEAP_NEWSIZE should be either set
|
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# or not (if you set one, set the other).
|
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#
|
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# The main trade-off for the young generation is that the larger it
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# is, the longer GC pause times will be. The shorter it is, the more
|
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# expensive GC will be (usually).
|
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#
|
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# The example HEAP_NEWSIZE assumes a modern 8-core+ machine for decent pause
|
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# times. If in doubt, and if you do not particularly want to tweak, go with
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# 100 MB per physical CPU core.
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# to the Java heap.
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#MAX_HEAP_SIZE="4G"
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#HEAP_NEWSIZE="800M"
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# Set this to control the amount of arenas per-thread in glibc
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#export MALLOC_ARENA_MAX=4
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if [ "x$MAX_HEAP_SIZE" = "x" ] && [ "x$HEAP_NEWSIZE" = "x" ]; then
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# only calculate the size if it's not set manually
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if [ "x$MAX_HEAP_SIZE" = "x" ] ; then
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calculate_heap_sizes
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else
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if [ "x$MAX_HEAP_SIZE" = "x" ] || [ "x$HEAP_NEWSIZE" = "x" ]; then
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echo "please set or unset MAX_HEAP_SIZE and HEAP_NEWSIZE in pairs (see cassandra-env.sh)"
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exit 1
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fi
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fi
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if [ "x$MALLOC_ARENA_MAX" = "x" ]
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then
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if [ "x$MALLOC_ARENA_MAX" = "x" ] ; then
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export MALLOC_ARENA_MAX=4
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fi
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@ -207,13 +155,6 @@ case "`uname -s`" in
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;;
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esac
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# Specifies the default port over which Cassandra will be available for
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# JMX connections.
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# For security reasons, you should not expose this port to the internet. Firewall it if needed.
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JMX_PORT="7199"
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# Here we create the arguments that will get passed to the jvm when
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# starting cassandra.
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@ -221,12 +162,61 @@ JMX_PORT="7199"
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# performance benefit (around 5%).
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JVM_OPTS="$JVM_OPTS -ea"
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# min and max heap sizes should be set to the same value to avoid
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# stop-the-world GC pauses during resize, and so that we can lock the
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# heap in memory on startup to prevent any of it from being swapped
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# out.
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JVM_OPTS="$JVM_OPTS -Xms${MAX_HEAP_SIZE}"
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JVM_OPTS="$JVM_OPTS -Xmx${MAX_HEAP_SIZE}"
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# Per-thread stack size.
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JVM_OPTS="$JVM_OPTS -Xss256k"
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# Use the Hotspot garbage-first collector.
|
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JVM_OPTS="$JVM_OPTS -XX:+UseG1GC"
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# Have the JVM do less remembered set work during STW, instead
|
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# preferring concurrent GC. Reduces p99.9 latency.
|
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JVM_OPTS="$JVM_OPTS -XX:G1RSetUpdatingPauseTimePercent=5"
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# The JVM maximum is 8 PGC threads and 1/4 of that for ConcGC.
|
||||
# Machines with > 10 cores may need additional threads. Increase to <= full cores.
|
||||
#JVM_OPTS="$JVM_OPTS -XX:ParallelGCThreads=16"
|
||||
#JVM_OPTS="$JVM_OPTS -XX:ConcGCThreads=16"
|
||||
|
||||
# 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.
|
||||
JVM_OPTS="$JVM_OPTS -XX:MaxGCPauseMillis=500"
|
||||
|
||||
# Save CPU time on large (>= 16GB) heaps by delaying region scanning
|
||||
# until the heap is 70% full. The default in Hotspot 8u40 is 40%.
|
||||
#JVM_OPTS="$JVM_OPTS -XX:InitiatingHeapOccupancyPercent=70"
|
||||
|
||||
# Make sure all memory is faulted and zeroed on startup.
|
||||
# This helps prevent soft faults in containers and makes
|
||||
# transparent hugepage allocation more effective.
|
||||
JVM_OPTS="$JVM_OPTS -XX:+AlwaysPreTouch"
|
||||
|
||||
# Biased locking does not benefit Cassandra.
|
||||
JVM_OPTS="$JVM_OPTS -XX:-UseBiasedLocking"
|
||||
|
||||
# Larger interned string table, for gossip's benefit (CASSANDRA-6410)
|
||||
JVM_OPTS="$JVM_OPTS -XX:StringTableSize=1000003"
|
||||
|
||||
# Enable thread-local allocation blocks and allow the JVM to automatically
|
||||
# resize them at runtime.
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseTLAB -XX:+ResizeTLAB"
|
||||
|
||||
# http://www.evanjones.ca/jvm-mmap-pause.html
|
||||
JVM_OPTS="$JVM_OPTS -XX:+PerfDisableSharedMem"
|
||||
|
||||
# provides hints to the JIT compiler
|
||||
JVM_OPTS="$JVM_OPTS -XX:CompileCommandFile=$CASSANDRA_CONF/hotspot_compiler"
|
||||
|
||||
# add the jamm javaagent
|
||||
JVM_OPTS="$JVM_OPTS -javaagent:$CASSANDRA_HOME/lib/jamm-0.3.0.jar"
|
||||
|
||||
# some JVMs will fill up their heap when accessed via JMX, see CASSANDRA-6541
|
||||
JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled"
|
||||
|
||||
# enable thread priorities, primarily so we can give periodic tasks
|
||||
# a lower priority to avoid interfering with client workload
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseThreadPriorities"
|
||||
|
|
@ -234,51 +224,12 @@ JVM_OPTS="$JVM_OPTS -XX:+UseThreadPriorities"
|
|||
# http://tech.stolsvik.com/2010/01/linux-java-thread-priorities-workaround.html
|
||||
JVM_OPTS="$JVM_OPTS -XX:ThreadPriorityPolicy=42"
|
||||
|
||||
# min and max heap sizes should be set to the same value to avoid
|
||||
# stop-the-world GC pauses during resize, and so that we can lock the
|
||||
# heap in memory on startup to prevent any of it from being swapped
|
||||
# out.
|
||||
JVM_OPTS="$JVM_OPTS -Xms${MAX_HEAP_SIZE}"
|
||||
JVM_OPTS="$JVM_OPTS -Xmx${MAX_HEAP_SIZE}"
|
||||
JVM_OPTS="$JVM_OPTS -Xmn${HEAP_NEWSIZE}"
|
||||
JVM_OPTS="$JVM_OPTS -XX:+HeapDumpOnOutOfMemoryError"
|
||||
|
||||
# set jvm HeapDumpPath with CASSANDRA_HEAPDUMP_DIR
|
||||
JVM_OPTS="$JVM_OPTS -XX:+HeapDumpOnOutOfMemoryError"
|
||||
if [ "x$CASSANDRA_HEAPDUMP_DIR" != "x" ]; then
|
||||
JVM_OPTS="$JVM_OPTS -XX:HeapDumpPath=$CASSANDRA_HEAPDUMP_DIR/cassandra-`date +%s`-pid$$.hprof"
|
||||
fi
|
||||
|
||||
|
||||
startswith() { [ "${1#$2}" != "$1" ]; }
|
||||
|
||||
# Per-thread stack size.
|
||||
JVM_OPTS="$JVM_OPTS -Xss256k"
|
||||
|
||||
# Larger interned string table, for gossip's benefit (CASSANDRA-6410)
|
||||
JVM_OPTS="$JVM_OPTS -XX:StringTableSize=1000003"
|
||||
|
||||
# GC tuning options
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseParNewGC"
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseConcMarkSweepGC"
|
||||
JVM_OPTS="$JVM_OPTS -XX:+CMSParallelRemarkEnabled"
|
||||
JVM_OPTS="$JVM_OPTS -XX:SurvivorRatio=8"
|
||||
JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=1"
|
||||
JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=75"
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly"
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseTLAB"
|
||||
JVM_OPTS="$JVM_OPTS -XX:+PerfDisableSharedMem"
|
||||
JVM_OPTS="$JVM_OPTS -XX:CompileCommandFile=$CASSANDRA_CONF/hotspot_compiler"
|
||||
JVM_OPTS="$JVM_OPTS -XX:CMSWaitDuration=10000"
|
||||
|
||||
# note: bash evals '1.7.x' as > '1.7' so this is really a >= 1.7 jvm check
|
||||
if { [ "$JVM_VERSION" \> "1.7" ] && [ "$JVM_VERSION" \< "1.8.0" ] && [ "$JVM_PATCH_VERSION" -ge "60" ]; } || [ "$JVM_VERSION" \> "1.8" ] ; then
|
||||
JVM_OPTS="$JVM_OPTS -XX:+CMSParallelInitialMarkEnabled -XX:+CMSEdenChunksRecordAlways -XX:CMSWaitDuration=10000"
|
||||
fi
|
||||
|
||||
if [ "$JVM_ARCH" = "64-Bit" ] ; then
|
||||
JVM_OPTS="$JVM_OPTS -XX:+UseCondCardMark"
|
||||
fi
|
||||
|
||||
# GC logging options -- uncomment to enable
|
||||
# JVM_OPTS="$JVM_OPTS -XX:+PrintGCDetails"
|
||||
# JVM_OPTS="$JVM_OPTS -XX:+PrintGCDateStamps"
|
||||
|
|
@ -287,9 +238,6 @@ fi
|
|||
# JVM_OPTS="$JVM_OPTS -XX:+PrintGCApplicationStoppedTime"
|
||||
# JVM_OPTS="$JVM_OPTS -XX:+PrintPromotionFailure"
|
||||
# JVM_OPTS="$JVM_OPTS -XX:PrintFLSStatistics=1"
|
||||
# JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc-`date +%s`.log"
|
||||
# If you are using JDK 6u34 7u2 or later you can enable GC log rotation
|
||||
# don't stick the date in the log name if rotation is on.
|
||||
# JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc.log"
|
||||
# JVM_OPTS="$JVM_OPTS -XX:+UseGCLogFileRotation"
|
||||
# JVM_OPTS="$JVM_OPTS -XX:NumberOfGCLogFiles=10"
|
||||
|
|
@ -328,6 +276,11 @@ JVM_OPTS="$JVM_OPTS -Djava.net.preferIPv4Stack=true"
|
|||
#
|
||||
LOCAL_JMX=yes
|
||||
|
||||
# Specifies the default port over which Cassandra will be available for
|
||||
# JMX connections.
|
||||
# For security reasons, you should not expose this port to the internet. Firewall it if needed.
|
||||
JMX_PORT="7199"
|
||||
|
||||
if [ "$LOCAL_JMX" = "yes" ]; then
|
||||
JVM_OPTS="$JVM_OPTS -Dcassandra.jmx.local.port=$JMX_PORT -XX:+DisableExplicitGC"
|
||||
else
|
||||
|
|
|
|||
Loading…
Reference in New Issue