Thanks Brion, It's always nice to hear what you were thinking from someone else! Now, off to configure-land!
-Daniel -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brion Vibber Sent: Wednesday, April 11, 2012 2:39 PM To: Wikimedia developers Subject: Re: [Wikitech-l] APC and memcached On Wed, Apr 11, 2012 at 11:18 AM, Daniel Renfro <[email protected]>wrote: > I'd like to get some input on configuring the caching-strategy for my > Mediawiki installation. > > As I understand it, APC caches the PHP byte-code to improve on > webserver performance, but can also store sessions and objects. > Memcached is mainly used to save rendered pages, can be used to store > other things such as sessions and objects, but can be *distributed.* > Is there a downside to having these two caching mechanisms installed > on one machine? I am not interested in sharing caches between > machines, I'm only working with a single system. Is there an advantage > to using one strategy over the other for this case? > My recommendation is to install both APC and memcached; use APC exclusively for PHP opcode caching, and use memcached exclusively for caching data from the application. (ie, set up MediaWiki to use memcached and don't tell it anything about APC, which will Just Work for speeding up execution.) You can use APC for both if running on a single system, but there are some potential pitfalls: * you can easily run out of cache space unless you up the defaults a lot * web server's APC cache won't be available to CLI scripts, so command-line maintenance scripts may encounter caching problems * if you ever expand to multiple servers in the future, you'll need to switch to memcached anyway so the data cache can be shared. -- brion _______________________________________________ Wikitech-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikitech-l _______________________________________________ Wikitech-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikitech-l
