It might also be http2. Ive seen numerous issues with http2 performance
(which will hopefully be fixed soon). This can be tested with
“-Dsolr.http1=true”

- Houston

On Fri, May 24, 2024 at 1:25 PM Eric Pugh <ep...@opensourceconnections.com>
wrote:

> I’d be curious if other folks have seen this either anecdotally or even
> better through some performance testing!
>
> > On May 24, 2024, at 9:12 AM, Tim Funk <funk...@apache.org> wrote:
> >
> > solr9 turns security on manager by default. This has a high probability
> of
> > a performance impact..
> >
> > disable via adding to startup
> > export SOLR_SECURITY_MANAGER_ENABLED=false
> >
> > -Tim
> >
> > On Thu, May 23, 2024 at 11:23 AM elisabeth benoit <
> elisaelisael...@gmail.com>
> > wrote:
> >
> >> Hello,
> >>
> >> We've just migrated one of our services from solr 7.3.1 to solr 9.2.1 in
> >> production.
> >>
> >> We have 6 servers, each with one solr instance, all conf is automated
> with
> >> puppet, git, etc. so they  all have same conf, but they dont behave the
> >> same way. We have two servers with solr response time much faster, from
> >> 50ms to 75ms.
> >>
> >> This week we rebooted all our servers, and now we have three solr
> instances
> >> running faster than the three other ones instead of two.
> >>
> >> We've check everything we could think of: memory, GC, caches,
> everything is
> >> the same.
> >>
> >> We're not in solr cloud, but with leader conf.
> >>
> >> Just writing in case someone has an idea about this unstable behaviour.
> >>
> >>
>
> _______________________
> Eric Pugh | Founder | OpenSource Connections, LLC | 434.466.1467 |
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> Co-Author: Apache Solr Enterprise Search Server, 3rd Ed <
> https://www.packtpub.com/big-data-and-business-intelligence/apache-solr-enterprise-search-server-third-edition-raw>
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