I think I have it sorted. At this point I'm using GCG1, I take it, because most recently I started Solr as a service...
service solr start And that is running solr by way of /etc/init.d/solr because I don't have any systemd unit for solr, as explained here... https://askubuntu.com/questions/903354/difference-between-systemctl-and-service-commands And I can see in the System V script for solr that /etc/default/solr.in.sh is the relevant config file. On Tue, Oct 13, 2020 at 11:23 AM Ryan W <rya...@gmail.com> wrote: > Or, perhaps if I start solr like so.... > > service solr start > > ...it will use the solr.in.sh at /etc/default/solr.in.sh ? > > > > On Tue, Oct 13, 2020 at 11:19 AM Ryan W <rya...@gmail.com> wrote: > >> This is how I start solr: >> >> /opt/solr/bin/solr start >> >> In my /etc/default/solr.in.sh, I have this... >> >> GC_TUNE=" \ >> -XX:+UseG1GC \ >> -XX:+ParallelRefProcEnabled \ >> -XX:G1HeapRegionSize=8m \ >> -XX:MaxGCPauseMillis=200 \ >> -XX:+UseLargePages \ >> -XX:+AggressiveOpts \ >> " >> >> But I don't know how to tell if Solr is using that file. >> >> In my /opt/solr/bin there is no solr.in.sh, but there is a >> solr.in.sh.orig -- perhaps I should copy my /etc/default/solr.in.sh to >> /opt/solr/bin ? >> >> I am running Linux (RHEL). The Solr version is 7.7.2. Solr 8.x is not >> compatible with my application. >> >> Thank you. >> >> >> On Mon, Oct 12, 2020 at 9:46 PM Shawn Heisey <elyog...@elyograg.org> >> wrote: >> >>> On 10/12/2020 5:11 PM, Ryan W wrote: >>> > Thanks. How do I activate the G1GC collector? Do I do this by >>> editing a >>> > config file, or by adding a parameter when I start solr? >>> > >>> > Oracle's docs are pointing me to a file that supposedly is at >>> > instance-dir/OUD/config/java.properties, but I don't have that path. >>> I am >>> > not sure what is meant by instance-dir here, but perhaps it means my >>> JRE >>> > install, which is at >>> > /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.262.b10-0.el7_8.x86_64/jre -- but >>> > there is no "OUD" directory in this location. >>> >>> The collector is chosen by the startup options given to Java, in this >>> case by the start script for Solr. I've never heard of it being set by >>> a config in the JRE. >>> >>> In Solr 7, the start script defaults to the CMS collector. We have >>> updated that to G1 in the latest Solr 8.x versions, because CMS has been >>> deprecated by Oracle. >>> >>> Adding the following lines to the correct solr.in.sh would change the >>> garbage collector to G1. I got this from the "bin/solr" script in Solr >>> 8.5.1: >>> >>> GC_TUNE=('-XX:+UseG1GC' \ >>> '-XX:+PerfDisableSharedMem' \ >>> '-XX:+ParallelRefProcEnabled' \ >>> '-XX:MaxGCPauseMillis=250' \ >>> '-XX:+UseLargePages' \ >>> '-XX:+AlwaysPreTouch') >>> >>> If you used the service installer script to install Solr, then the >>> correct file to add this to is usually /etc/default/solr.in.sh ... but >>> if you did the install manually, it may be in the same bin directory >>> that contains the solr script itself. Your initial message says the >>> solr home is /opt/solr/server/solr so I am assuming it's not running on >>> Windows. >>> >>> Thanks, >>> Shawn >>> >>
