Great updates. Thanks for keeping us all in the loop!
On Thu, Oct 22, 2020 at 7:43 PM Wei wrote:
>
> Hi Shawn,
>
> I.m circling back with some new findings with our 2 NUMA issue. After a
> few iterations, we do see improvement with the useNUMA flag and other JVM
> setting changes. Here are the
Hi Shawn,
I.m circling back with some new findings with our 2 NUMA issue. After a
few iterations, we do see improvement with the useNUMA flag and other JVM
setting changes. Here are the current settings, with Java 11:
-XX:+UseNUMA
-XX:+UseG1GC
-XX:+AlwaysPreTouch
-XX:+UseTLAB
On 9/28/2020 12:17 PM, Wei wrote:
Thanks Shawn. Looks like Java 11 is the way to go with -XX:+UseNUMA. Do you
see any backward compatibility issue for Solr 8 with Java 11? Can we run
Solr 8 built with JDK 8 in Java 11 JRE, or need to rebuild solr with Java
11 JDK?
I do not know of any problems
Thanks Shawn. Looks like Java 11 is the way to go with -XX:+UseNUMA. Do you
see any backward compatibility issue for Solr 8 with Java 11? Can we run
Solr 8 built with JDK 8 in Java 11 JRE, or need to rebuild solr with Java
11 JDK?
Best,
Wei
On Sat, Sep 26, 2020 at 6:44 PM Shawn Heisey wrote:
>
On 9/26/2020 1:39 PM, Wei wrote:
Thanks Shawn! Currently we are still using the CMS collector for solr with
Java 8. When last evaluated with Solr 7, CMS performs better than G1 for
our case. When using G1, is it better to upgrade from Java 8 to Java 11?
From
Thanks Shawn! Currently we are still using the CMS collector for solr with
Java 8. When last evaluated with Solr 7, CMS performs better than G1 for
our case. When using G1, is it better to upgrade from Java 8 to Java 11?
>From https://lucene.apache.org/solr/guide/8_4/solr-system-requirements.html,
On 9/23/2020 7:42 PM, Wei wrote:
Recently we deployed solr 8.4.1 on a batch of new servers with 2 NUMAs. I
noticed that query latency almost doubled compared to deployment on single
NUMA machines. Not sure what's causing the huge difference. Is there any
tuning to boost the performance on
Thanks Dominique. I'll start with the -XX:+UseNUMA option.
Best,
Wei
On Fri, Sep 25, 2020 at 7:04 AM Dominique Bejean
wrote:
> Hi,
>
> This would be a Java VM option, not something Solr itself can know about.
> Take a look at this article in comments. May be it will help.
>
>
Hi,
This would be a Java VM option, not something Solr itself can know about.
Take a look at this article in comments. May be it will help.
https://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html?showComment=1347033706559#c229885263664926125
Regards
Dominique
Le jeu. 24
