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https://issues.apache.org/jira/browse/SOLR-11078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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bidorbuy updated SOLR-11078:
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Attachment: compare-6.4.2-6.6.0.png
> Solr query performance degradation since Solr 6.4.2
> ---------------------------------------------------
>
> Key: SOLR-11078
> URL: https://issues.apache.org/jira/browse/SOLR-11078
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 6.6
> Environment: * CentOS 7.3 (Linux zasolrm03 3.10.0-514.26.2.el7.x86_64
> #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux)
> * Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
> * 4 CPU, 10GB RAM
> Running Solr 6.6.0 with the following JVM settings:
> java -server -Xms4G -Xmx4G -XX:NewRatio=3 -XX:SurvivorRatio=4
> -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=8 -XX:+UseConcMarkSweepGC
> -XX:+UseParNewGC -XX:ConcGCThreads=4 -XX:ParallelGCThreads=4
> -XX:+CMSScavengeBeforeRemark -XX:PretenureSizeThreshold=64m
> -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=50
> -XX:CMSMaxAbortablePrecleanTime=6000 -XX:+CMSParallelRemarkEnabled
> -XX:+ParallelRefProcEnabled -verbose:gc -XX:+PrintHeapAtGC
> -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps
> -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationStoppedTime
> -Xloggc:/home/prodza/solrserver/../logs/solr_gc.log -XX:+UseGCLogFileRotation
> -XX:NumberOfGCLogFiles=9 -XX:GCLogFileSize=20M
> -Dsolr.log.dir=/home/prodza/solrserver/../logs -Djetty.port=8983
> -DSTOP.PORT=7983 -DSTOP.KEY=solrrocks -Duser.timezone=SAST
> -Djetty.home=/home/prodza/solrserver/server
> -Dsolr.solr.home=/home/prodza/solrserver/../solr
> -Dsolr.install.dir=/home/prodza/solrserver
> -Dlog4j.configuration=file:/home/prodza/solrserver/../config/log4j.properties
> -Xss256k -Xss256k -Dsolr.log.muteconsole
> -XX:OnOutOfMemoryError=/home/prodza/solrserver/bin/oom_solr.sh 8983
> /home/prodza/solrserver/../logs -jar start.jar --module=http
> Reporter: bidorbuy
> Attachments: compare-6.4.2-6.6.0.png
>
>
> We are currently running 2 separate Solr servers - refer to screenshots:
> * zasolrm02 is running on Solr 6.4.2
> * zasolrm03 is running on Solr 6.6.0
> Both servers have the same OS / JVM configuration and are using their own
> indexes. We round-robin load-balance through our Tomcats and notice that
> Since Solr 6.4.2 performance has dropped.
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