Thanks Shawn. Something seems different between the two because Caffeine Cache is having much higher volume per hour than our previous implementation was. So I guess it is then more likely that it is something actually expected due to a change in what is getting kept/warmed, so I'll look into this more and get back to you if that doesn't end up making sense based on what I observe.
Thanks again, Stephen On Tue, Mar 2, 2021 at 6:35 PM Shawn Heisey <apa...@elyograg.org> wrote: > On 3/2/2021 3:47 PM, Stephen Lewis Bianamara wrote: > > I'm investigating a weird behavior I've observed in the admin page for > > caffeine cache metrics. It looks to me like on the older caches, warm-up > > queries were not counted toward hit/miss ratios, which of course makes > > sense, but on Caffeine cache it looks like they are. I'm using solr 8.3. > > > > Obviously this makes measuring its true impact a little tough. Is this by > > any chance a known issue and already fixed in later versions? > > The earlier cache implementations are entirely native to Solr -- all the > source code is include in the Solr codebase. > > Caffeine is a third-party cache implementation that has been integrated > into Solr. Some of the metrics might come directly from Caffeine, not > Solr code. > > I would expect warming queries to be counted on any of the cache > implementations. One of the reasons that the warming capability exists > is to pre-populate the caches before actual queries begin. If warming > queries are somehow excluded, then the cache metrics would not be correct. > > I looked into the code and did not find anything that would keep warming > queries from affecting stats. But it is always possible that I just > didn't know what to look for. > > In the master branch (Solr 9.0), CaffeineCache is currently the only > implementation available. > > Thanks, > Shawn >
