Re: Caffeine Cache Metrics Broken?
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 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 >
Re: Caffeine Cache Metrics Broken?
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
Caffeine Cache Metrics Broken?
Hi SOLR Community, 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? Thanks! Stephen
