Hi, Ere. Thank you for valuable feedback. I will try Xmx31G and Xms31G instead of current ones.
Thanks and Regards, Yasufumi. 2019年9月30日(月) 17:19 Ere Maijala <ere.maij...@helsinki.fi>: > 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 >
