Just a side note: -Xmx32G is really bad for performance as it forces Java to use non-compressed pointers. You'll actually get better results with -Xmx31G. For more information, see e.g. https://blog.codecentric.de/en/2014/02/35gb-heap-less-32gb-java-jvm-memory-oddities/
Regards, Ere Yasufumi Mizoguchi kirjoitti 30.9.2019 klo 11.05: > Hi, Deepak. > Thank you for replying me. > > JVM settings from solr.in.sh file are as follows. (Sorry, I could not show > all due to our policy) > > -verbose:gc > -XX:+PrintHeapAtGC > -XX:+PrintGCDetails > -XX:+PrintGCDateStamps > -XX:+PrintGCTimeStamps > -XX:+PrintTenuringDistribution > -XX:+PrintGCApplicationStoppedTime > -Dcom.sun.management.jmxremote.ssl=false > -Dcom.sun.management.jmxremote.authenticate=false > -Dcom.sun.management.jmxremote.port=18983 > -XX:OnOutOfMemoryError=/home/solr/solr-6.2.1/bin/oom_solr.sh > -XX:NewSize=128m > -XX:MaxNewSize=128m > -XX:+UseG1GC > -XX:+PerfDisableSharedMem > -XX:+ParallelRefProcEnabled > -XX:G1HeapRegionSize=8m > -XX:MaxGCPauseMillis=250 > -XX:InitiatingHeapOccupancyPercent=75 > -XX:+UseLargePages > -XX:+AggressiveOpts > -Xmx32G > -Xms32G > -Xss256k > > > Thanks & Regards > Yasufumi. > > 2019年9月30日(月) 16:12 Deepak Goel <deic...@gmail.com>: > >> Hello >> >> Can you please share the JVM heap settings in detail? >> >> Deepak >> >> On Mon, 30 Sep 2019, 11:15 Yasufumi Mizoguchi, <yasufumi0...@gmail.com> >> wrote: >> >>> Hi, >>> >>> I am trying some tests to confirm if single Solr instance can perform >> over >>> 1000 queries per second(!). >>> >>> But now, although CPU usage is 40% or so and iowait is almost 0%, >>> throughput does not increase over 60 queries per second. >>> >>> I think there are some bottlenecks around Kernel, JVM, or Solr settings. >>> >>> The values we already checked and configured are followings. >>> >>> * Kernel: >>> file descriptor >>> net.ipv4.tcp_max_syn_backlog >>> net.ipv4.tcp_syncookies >>> net.core.somaxconn >>> net.core.rmem_max >>> net.core.wmem_max >>> net.ipv4.tcp_rmem >>> net.ipv4.tcp_wmem >>> >>> * JVM: >>> Heap [ -> 32GB] >>> G1GC settings >>> >>> * Solr: >>> (Jetty) MaxThreads [ -> 20000] >>> >>> >>> And the other info is as follows. >>> >>> CPU : 16 cores >>> RAM : 128 GB >>> Disk : SSD 500GB >>> NIC : 10Gbps(maybe) >>> OS : Ubuntu 14.04 >>> JVM : OpenJDK 1.8.0u191 >>> Solr : 6.2.1 >>> Index size : about 60GB >>> >>> Any insights will be appreciated. >>> >>> Thanks and regards, >>> Yasufumi. >>> >> > -- Ere Maijala Kansalliskirjasto / The National Library of Finland
