Shawn Heisey

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  1. Shawn Heisey
    1. GC Tuning

GC Tuning

Java GC tuning options that work for me with Solr on 64-bit CentOS 6 with Oracle Java 7: 

-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=75
-XX:NewRatio=3
-XX:MaxTenuringThreshold=8
-XX:+CMSParallelRemarkEnabled
-XX:+ParallelRefProcEnabled
-XX:+UseLargePages
-XX:+AggressiveOpts

I got a recommendation on IRC for a simpler alternative. One day when I find the time, I will do some more extensive testing. 

<@gbowyer> try these on for size -server -Xmx8g -Xms8g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=80

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ShawnHeisey (last edited 2013-05-07 20:48:30 by ShawnHeisey)