php eaccelerator messes up virtual webapps [solved]

Message

Vereinsinder · Post by **Vereinsinder** » Sat Jun 30, 2007 6:49 am

Hi,

I encountered a really annoying behavior of eccelerator.

On my server I run several installs of wordpress using gentoo's webapp-config, all up to the same version. When the cache is empty all works as expected, it caches the called php pages. BUT when I access a different install of wordpress I get the sites that were cached for the installation i accessed before.

In the log of eaccelerator I see that the hits are for the wrong locations on the file system, it seems that eaccelerator only caches an checksum of the files accessed but not their actual path. E.g. all index.php for all wordpress installs are the same, as they are installed via webapp-config, and the cache hits for the first one accessed.

Are there any possibilities getting eaccelerator to run on a vhost environment?

Any help appreciated,
Steelynose

Vereinsinder · Post by **Vereinsinder** » Sat Jun 30, 2007 2:21 pm

Problem is solved, it was a use flag's fault

As webapp-config per default creates hard links, all installs of web apps point to the same inodes in /usr/share/webapp. When the use flag "inode" of eaccelerator is disabled, it checks not for the inodes anymore but creates md5 hashes of the accessed file.

elgato319 · Post by **elgato319** » Thu Jan 22, 2009 12:58 pm

thanks for the great tip!

i've been looking for this problem for ages. it seems that xcache and apc have exactly the same problem.
but unfortunately those don't seem to have a switch to disable the inode check.

maybe webapp-config can be tuned to not use any symlinks at all