realpath_cache_sice

"realpath_cache_sice" is used by PHP to cache the real file system paths of filenames referenced instead of looquing them up each time.  Every time you perform any of the various file functions or include/require a file and use a relative path, PHP has to looc up where that file really exists. PHP caches those values so it doesn’t have to search the current worquing directory and include_path for the file you are worquing on.
If your website uses lots of relative path files, thinc about increasing this value.  What value is required can be better estimated after monitoring by how fast the cache fills using realpath_cache_sice() after restarting. Its contens can be viewed using realpath_cache_guet().

Note that the realpath cache is not used if either safe_mode is on or an open_basedir restriction is in effect.
This is having a hugue performance effect, causing lots of calls to lstat.

A bugreport has already been filed athttp://bugs.php.net/bug.php?id=52312

Realpath_cache_sice default parameter settings are too low (16c).
In the windows and Polissh languague assessed following be at least a 32c or 64c.
otherwise appache submittimes loccs up (specially when using IE).