Re: APC causing problems with logins in Mediawiki

Nathan Kinkade wrote: > On Tue, Jun 16, 2009 at 11:35 AM, Rasmus Lerdorf<rasmus@lerdorf.com> wrote: >> Is your "Cache full count" staying at 0? Check your apc.php page. > > It was not. The cache full count was fairly high. Just after posting > to pecl-dev yesterday I bumped the shared memory to 300M and increased > the ttl and user_ttl to 3600, because I was wondering whether > fragmentation and high cache full counts could cause this issue. So > do I take this to mean that the cache filling up could potentially > cause strange behavior on some sites? We don't have anything concrete, but it is the only symptom I have seen that correlates with problems like this. And, for performance reasons, you want to keep your cache full count low anyway. Things get slow when we need to waste time cleaning the cache, so you want to avoid that as much as possible either by giving it more room like you did, or by using apc.filter and caching less stuff. -Rasmus