opcode-cache

What are "Hits & Misses" in reference to APC opcode caching? I've installed APC and it's running great, but I've got "some" misses and I'm wondering if that's "bad". Also, I am running Openx and, as such, am filling up the "Cache full count(s)" pretty quickly. What do I need to change in the configuration to minimize that? Any recommended configurations? Justin Some misses are to be expected. Hits = things are in cache Miss = things not (yet) in cache. New or less-used things will always be a miss, so you'll always expect some. You may need to tune how much memory you're dedicating to APC -

Currently on a very large project that I do not plan to re-use for another site, I have the site's name hardcoded into the files everywhere. Now, if I were ever to change the site name it would take a lot of effort to change that everywhere. I know the obvious solution is to just store the name as a variable or a constant, but I guess you could call it my micro-optimizing way of thinking: I always figured it would be one less thing PHP has to parse. I do realize it won't make much difference, but I just wanted to know whether using an opcode cache like APC would mean that PHP wouldn't even

I've searched all over the web for documentation including on the XCache website . I'm new to PHP opcode caching and XCache. I'd like an explanation of how XCache works. I know that it stores compiled php code so that it doesn't need to be recompiled everytime. But how does XCache know when php code has been updated and thus the cache is out of date? How do I know if I need to clear the cache? Does XCache compile and cache all php code on the server? If so can this be configured? What are clogs? OOMs? I see large numbers for both of these in the XCache Admin page interface. In the Code

How would I use the apc.filters parameter in APC opcode caching to not cache certain paths? For example, I want caching to be active for anything under the path: "/var/www/vhosts" and exclude paths like "/usr/share/psa-horde/" I tried using apc.cache_by_default = 0 apc.filters = "+/var/www/vhosts" and apc.cache_by_default = 1 apc.filters = "-/usr/share/psa-horde/" But neither worked as I expected. http://www.php.net/manual/en/apc.configuration.php#ini.apc.filters Should the filter be something more like "+/var/www/vhosts/*" (note the wildcard)? I'm afraid this isn't possible because of the way

here is a link to how my APC is running : [removed] As you can see, it fills up pretty quickly and my Cache Full Count goes over 1000 sometimes My website uses Wordpress. I notice that every time I make a new post or edit a post, 2 things happen. 1) APC Memory "USED" resets 2) I get a whole lot of Fragments I've tried giving more Memory to APC (512 mb) but then it crashes sometimes, it seems 384 is best. I also have a Cron job that restarts apache, clearing all APC of fragments and used memory, every 4 hours. Again, my apache crashes if APC is running for a long period of time, I think due to

Sorry if this is basic, I am trying to learn as much as I can about OO in PHP and I am slowly learning how to use it (very limited). So I am wanting to know if __autoload() has any affect on PHP opcode cache's? Pascal MARTIN (Disclaimer : I only know APC) What an opcode cache do is : when a file is included/required, it take the full path to that file check if the opcodes corresponding to that file are already in RAM (in opcode cache) if yes, return those opcode so they are executed if no, load the file and compile it to opcodes ; and store opcodes in cache. The important point, here, is the