Abc  created SOLR-10172:
---------------------------

             Summary: Sorl 6 with jetty issues
                 Key: SOLR-10172
                 URL: https://issues.apache.org/jira/browse/SOLR-10172
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Abc 
            Priority: Blocker


Issues with solr settings while migrating from solr 4.0 to solr6.0.

Issue Faced : My cpu consumption goes to unacceptable levels. ie. load on 
solr4.0 is between 6 to 10 while load on solr 6 reaches 100 and since its the 
production i rolled back quickly.

My Solr4 setting

 - Running on tomcat
 - JVM Memory : 16GB
 - 24 core cpu
 - JVM settings :
   - JVM Runtime Java HotSpot(TM) 64-Bit Server VM (24.45-b08) 
   - Processors   24 
   - Args : Paths mentioned here


**My Solr6 setting**

 - Running on jetty
 - JVM Memory : 20GB
 - 32 core cpu
 - JVM settings :
   - Oracle Corporation Java HotSpot(TM) 64-Bit Server VM 1.8.0_45 25.45-b02
   - Processors   32
   - Args
      - DSTOP.KEY=solrrocks
      - DSTOP.PORT=7983
      - Djetty.home=/usr/local/solr-6.4.1/server-Djetty.port=8983
      - 
Dlog4j.configuration=file:/usr/local/solr-6.4.1/example/resources/log4j.properties
      - 
Dsolr.install.dir=/usr/local/solr-6.4.1-Dsolr.log.dir=/usr/local/solr-6.4.1/example/techproducts/solr/../logs
      - Dsolr.log.muteconsole
      - 
Dsolr.solr.home=/usr/local/solr-6.4.1/example/techproducts/solr-Duser.timezone=US/Eastern
      - XX:+AggressiveOpts
      - XX:+CMSParallelRemarkEnabled
      - XX:+CMSScavengeBeforeRemark
      - XX:+ParallelRefProcEnabled
      - XX:+PrintGCApplicationStoppedTime
      - XX:+PrintGCDateStamps
      - XX:+PrintGCDetails
      - XX:+PrintGCTimeStamps
      - XX:+PrintHeapAtGC
      - XX:+PrintTenuringDistribution
      - XX:+UseCMSInitiatingOccupancyOnly
      - XX:+UseConcMarkSweepGC
      - XX:+UseGCLogFileRotation
      - XX:-UseSuperWord
      - XX:CMSFullGCsBeforeCompaction=1
      - XX:CMSInitiatingOccupancyFraction=70
      - XX:CMSMaxAbortablePrecleanTime=6000
      - XX:CMSTriggerPermRatio=80
      - XX:GCLogFileSize=20M
      - XX:MaxTenuringThreshold=8
      - XX:NewRatio=2
      - XX:NumberOfGCLogFiles=9
      - XX:OnOutOfMemoryError=/usr/local/solr-6.4.1/bin/oom_solr.sh 8983 
/usr/local/solr-6.4.1/example/techproducts/solr/../logs
      - XX:PretenureSizeThreshold=64m
      - XX:SurvivorRatio=15
      - 
XX:TargetSurvivorRatio=90-Xloggc:/usr/local/solr-6.4.1/example/techproducts/solr/../logs/solr_gc.log-Xms21g-Xmx21g-Xss256k-verbose:gc

Bug :
In this version, there must be issue regarding cpu utilization.



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