I applied the OPTS you pointed me to, here's the full string: CATALINA_OPTS="${CATALINA_OPTS} -XX:NewSize=1536m -XX:MaxNewSize=1536m -Xms12288m -Xmx12288m -XX:NewRatio=3 -XX:SurvivorRatio=4 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=8 -XX:+UseConcMarkSweepGC -XX:+CMSScavengeBeforeRemark -XX:PretenureSizeThreshold=64m -XX:CMSFullGCsBeforeCompaction=1 -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:CMSTriggerPermRatio=80 -XX:CMSMaxAbortablePrecleanTime=6000 -XX:+CMSParallelRemarkEnabled -XX:+ParallelRefProcEnabled -XX:+UseLargePages -XX:+AggressiveOpts"
jConsole is now showing lower heap usage. It had been climbing to 12G consistently, now it is only spiking to 10G every 10 minutes or so. Here's my "top" output ======================================================= PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4250 root 20 0 129g 14g 1.9g S 2.0 21.3 17:40.61 java -- View this message in context: http://lucene.472066.n3.nabble.com/SolrCloud-OOM-Problem-tp4152389p4152753.html Sent from the Solr - User mailing list archive at Nabble.com.