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https://issues.apache.org/jira/browse/SOLR-10140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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bidorbuy updated SOLR-10140:
----------------------------
Attachment: Solr6.4.1-info-dashboard.png
> Performance degradation and CPU spike when moving to Solr 6.4.1
> ---------------------------------------------------------------
>
> Key: SOLR-10140
> URL: https://issues.apache.org/jira/browse/SOLR-10140
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Server
> Affects Versions: 6.4.1
> Environment: CentOS Linux release 7.3.1611 (Core)
> Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
> Reporter: bidorbuy
> Attachments: Solr6.2.0.png, Solr6.4.1-info-dashboard.png,
> Solr6.4.1-info-index.png, Solr6.4.1.png
>
>
> We migrated from a perfectly healthy Solr 6.2.0 installation to Solr 6.4.1
> and when switching Solr 6.4.1 into production, load-average and CPU trash -
> compare Solr6.4.1.png (which shows that CPU and load-average spike) with
> Solr6.2.0.png (very stable, predictable utilisation).
> Migration changes:
> - Changed luceneMatchVersion from 6.2.0 to 6.4.1 and rebuild index
> - Changed solr.SynonymFilterFactory to solr.SynonymFilterFactory
> - Removed defaultSearchField and replaced with df in solrconfig.xml
> - Removed solrQueryParser defaultOperator and replaced with q.op in
> solrconfig.xml
> - Increased heap from 3G to 4G via "SOLR_JAVA_MEM="-Xms4G -Xmx4G""
> - Our GC tune remains unchanged:
> {code}
> GC_TUNE="-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"
> {code}
>
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