A new garbage collector won’t fix it, but it might help a bit. Requesting 200 facet fields and having 50-60 of them with results is a huge amount of work for Solr. A typical faceting implementation might have three to five facets. Your requests will be at least 10X to 20X slower.
Check the CPU during one request. It should use nearly 100% of a single CPU. If it a lot lower than 100%, you have another bottleneck. That might be insufficient heap or accessing disk during query requests (not enough RAM). If it is near 100%, the only thing you can do is get a faster CPU. One other question, how frequently is the index updated? wunder Walter Underwood wun...@wunderwood.org http://observer.wunderwood.org/ (my blog) > On Jan 19, 2020, at 4:49 PM, Rajdeep Sahoo <rajdeepsahoo2...@gmail.com> wrote: > > Hi, > Still facing the same issue... > Anything else that we need to check. > > > On Mon, 20 Jan, 2020, 4:07 AM Walter Underwood, <wun...@wunderwood.org> > wrote: > >> With Java 1.8, I would use the G1 garbage collector. We’ve been running >> that combination in prod for three years with no problems. >> >> SOLR_HEAP=8g >> # Use G1 GC -- wunder 2017-01-23 >> # Settings from https://wiki.apache.org/solr/ShawnHeisey >> GC_TUNE=" \ >> -XX:+UseG1GC \ >> -XX:+ParallelRefProcEnabled \ >> -XX:G1HeapRegionSize=8m \ >> -XX:MaxGCPauseMillis=200 \ >> -XX:+UseLargePages \ >> -XX:+AggressiveOpts \ >> “ >> >> wunder >> Walter Underwood >> wun...@wunderwood.org >> http://observer.wunderwood.org/ (my blog) >> >>> On Jan 19, 2020, at 9:25 AM, Rajdeep Sahoo <rajdeepsahoo2...@gmail.com> >> wrote: >>> >>> We are using solr 7.7 . Ram size is 24 gb and allocated space is 12 gb. >> We >>> have completed indexing after starting the server suddenly heap space is >>> getting full. >>> Added gc params , still not working and jdk version is 1.8 . >>> Please find the below gc params >>> -XX:NewRatio=2 >>> -XX:SurvivorRatio=3 >>> -XX:TargetSurvivorRatio=90 \ >>> -XX:MaxTenuringThreshold=8 \ >>> -XX:+UseConcMarkSweepGC \ >>> -XX:+CMSScavengeBeforeRemark \ >>> -XX:ConcGCThreads=4 -XX:ParallelGCThreads=4 \ >>> -XX:PretenureSizeThreshold=512m \ >>> -XX:CMSFullGCsBeforeCompaction=1 \ >>> -XX:+UseCMSInitiatingOccupancyOnly \ >>> -XX:CMSInitiatingOccupancyFraction=70 \ >>> -XX:CMSMaxAbortablePrecleanTime=6000 \ >>> -XX:+CMSParallelRemarkEnabled >>> -XX:+ParallelRefProcEnabled >>> -XX:+UseLargePages \ >>> -XX:+AggressiveOpts \ >> >>
