Can you provide more details on what they CPU time is spent on? Maybe look at some JFR profiles or collect several jstacks to see where they bottlenecks are.
On Sat, Mar 26, 2022 at 3:49 AM Modassar Ather <modather1...@gmail.com> wrote: > Hi, > > We are trying to migrate to Solr-8.11.0 from Solr-6.5.1. Following are the > details of Solr installation. > > Server : EC2 instance with 32 CPUs and 521 GB > Storage : EBS Volume. General Purpose SSD (gp3) with 3000/5000 IOPS > Ubuntu :Ubuntu 20.04.3 LTS > Java : openjdk 11.0.14 > SolrCloud : 12 shards having a total 4+ TB index. Each node has a 30GB max > memory limit. > GC setting on Solr : G1GC > Solr query timeout : 5 minutes > > During testing we observed a high CPU utilisation and few of the queries > with wildcard queries are timing out. These queries are getting executed > completely on Solr-6.5.1. > After tuning a few of the parameters of GC settings the CPU utilisation > came down but it is still high when compared with Solr-6.5.1 and some > queries with wildcard queries are still failing. > > Kindly provide your suggestions. > > Thanks, > Modassar >
