Hey,
> Both Memcache and APC can run in parallel so we might also consider using
both
Installing APC gives you a performance boost, even if the app does not
really do effort to take care of the cache.
I'm for a cache-type agnostic approach, ie one where you just cache things
wherever they should be cached according to the wikis config and available
caching tools. I recommend you have a look at wfGetCache in MediaWikis
GlobalFunctions.php, and the related functions that can be found near it.
Unfortunately there do not appear to be any docs on this. I've been using
wfGetCache( CACHE_ANYTHING ) a lot recently, which can work with memc when
available, but is also very effective when it's not (when stuff is stored
in the db).
The main questions for this project are probably not how to cache stuff (as
MediaWiki already provides the facilities you need), but rather what to
cache, when to cache it, and how to properly invalidate it (if needed).
An easy place to start would be SMWs special pages such as
Special:Properties, Special:Types and Special:SemanticStatistics (or
something like that). There you can easily cache the HTML output, and then
when the page is hit again, and is still in the cache, just use the build
up HTML, sparing you the need to do any queries (except the single one
obtaining the HTML) and the cost of rendering the page itself.
I wrote some generic utilities to cache special pages (for some other
extension), which we might want to use here, although I think it'd be best
if you just did a page without first, so you know how the stuff works, and
can use it where those utilities are not helpful :)
Cheers
--
Jeroen De Dauw
http://www.bn2vs.com
Don't panic. Don't be evil.
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