814622cc6c
The logstash and elasticsearch performance can be improved by using async index options, pulling back the refresh interval, and by not fingerprinting every document. * Async translog allows elasticsearch to using run fsync in the background instead of blocking * the refresh interval will now be 5x the number of replicas with a cap of 30. This integer is representitive of the seconds between index refresh calls which greatly lowers the load generated across the cluster. * All documents were fingerprinted before writting to the cluster. This was a costly operation as elasticsearch will do a forward lookup on all documents with a preset ID resulting in 100's, if not 1000's, of extra reads. The purpose of the fingerprint function is to limit repeading writes so to keep some of this functionality the fingerprint function is now only added to documents with messages. * G1 garbage collection is now enabled by default when the heap size is > 6GiB. Early versions of elasticsearch did not recommend this setting however its since stabalized in recent releases. * JVM options have been moved into the elasticsearch and logstash roles allowing these tasks to trigger service restarts when changes are made. Change-Id: I805129b207ad4db182ae6e59b6ec78eb3e246b54 Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
92 lines
2.3 KiB
Django/Jinja
92 lines
2.3 KiB
Django/Jinja
## JVM configuration
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{% if (not (elasticsearch_node_master | default(master_node)) | bool) and (not (elasticsearch_node_data | default(data_node)) | bool) %}
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{% set heap_size = (elastic_heap_size_default | int) // 2 %}
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{% else %}
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{% set heap_size = (elastic_heap_size_default | int) %}
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{% endif %}
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# Xms represents the initial size of total heap space
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-Xms{{ heap_size }}m
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# Xmx represents the maximum size of total heap space
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-Xmx{{ heap_size }}m
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# Sets the thread stack size
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-Xss1m
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################################################################
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## Expert settings
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################################################################
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##
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## All settings below this section are considered
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## expert settings. Don't tamper with them unless
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## you understand what you are doing
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##
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################################################################
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## GC Configuration
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{% if ((heap_size | int) > 6144) and (elastic_g1gc_enabled | bool) %}
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-XX:+UseG1GC
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-XX:MaxGCPauseMillis=400
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-XX:InitiatingHeapOccupancyPercent=75
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{% else %}
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-XX:+UseParNewGC
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-XX:+UseConcMarkSweepGC
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-XX:CMSInitiatingOccupancyFraction=75
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-XX:+UseCMSInitiatingOccupancyOnly
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{% endif %}
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## optimizations
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# disable calls to System#gc
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-XX:+DisableExplicitGC
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## locale
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# Set the locale language
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#-Duser.language=en
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# Set the locale country
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#-Duser.country=US
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# Set the locale variant, if any
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#-Duser.variant=
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## basic
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# set the I/O temp directory
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-Djava.io.tmpdir={{ temp_dir }}
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# set to headless, just in case
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-Djava.awt.headless=true
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# ensure UTF-8 encoding by default (e.g. filenames)
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-Dfile.encoding=UTF-8
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# use our provided JNA always versus the system one
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#-Djna.nosys=true
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## heap dumps
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# generate a heap dump when an allocation from the Java heap fails
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# heap dumps are created in the working directory of the JVM
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-XX:+HeapDumpOnOutOfMemoryError
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# specify an alternative path for heap dumps
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# ensure the directory exists and has sufficient space
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#-XX:HeapDumpPath=${LOGSTASH_HOME}/heapdump.hprof
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## GC logging
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#-XX:+PrintGCDetails
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#-XX:+PrintGCTimeStamps
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#-XX:+PrintGCDateStamps
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#-XX:+PrintClassHistogram
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#-XX:+PrintTenuringDistribution
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#-XX:+PrintGCApplicationStoppedTime
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# log GC status to a file with time stamps
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# ensure the directory exists
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#-Xloggc:${LS_GC_LOG_FILE}
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#listen on IPv4 addresses
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-Djava.net.preferIPv4Stack=true
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# Disable log4j because its not supported by elastic
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-Dlog4j2.disable.jmx=true
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