Hi all, I'd like to extend this question a bit. I just read the entire performance tuning chapter again [1], and I'm a bit puzzled especially about the ObjectContext's local caches, which Andrus also recommended to use in the "A way to refreshObject()" thread:
> So instead of micro-optimizations with shared snapshot cache, you should use > queries with cache groups and query cache. They get refetched when a cache > group is flushed in response to an object commit. So technically you are not > reusing the snapshot cache, but it really doesn't matter. The benefit you get > in code simplicity, consistency, and often performance, always outweighs > that. Besides this approach is cluster-friendly. Coming from EOF I grew the habit of frequently creating short-lived ObjectContexts, so basically every page load uses it's own new ObjectContext to get fresh data from the shared global cache, because other users may have altered data between page loads. While working on a page, I have references to the objects that I need there anyway, so I don't understand at all what that context-local cache mechanism should do for me, unless that "create new contexts all the time" strategy is just plain wrong for Cayenne-based applications? And even if I would use a longer-lived ObjectContext for something, where would that local cache get in effect? Either I have references to objects anyway, or I would need to refetch them, which would go through to the database, right? In what case would I get a benefit from a local cache? I didn't find answers to this in the Cayenne Guide. Thanks Maik [1] https://cayenne.apache.org/docs/4.0/cayenne-guide/performance-tuning.html <https://cayenne.apache.org/docs/4.0/cayenne-guide/performance-tuning.html> > Am 23.02.2017 um 09:43 schrieb Markus Reich <markus.re...@markusreich.at>: > > Hi, > > I'm looking for a more detailed explaination of the caching mechanism, as > we are running a quite important and big web application with cayenne, I > want to fine tune, because we run in some performance issues. > > I only found this > https://cayenne.apache.org/docs/3.0/individual-object-caching.html > > In 4.0 docu I can't find anything > > br > Meex
