On 23 Oct 2008, at 00:04, Martin Zvarík wrote:
I am looking at the eAccelerator's website and I realize what got me
confused:
there is a function for OUTPUT CACHE, so it actually could cache the
whole website and then run out of memory I guess...
that means I would be able to store anything into the memory and
reference it by a variable? are the variables accessible across the
whole server? I still don't really understand, but I am trying...
Having never used eAccelerator I can only guess, but it sounds like
it's a way to cache HTML output. As for how accessible that is I have
no idea. I suggest you find the eAccelerator mailing list, subscribe
to that and ask your question there.
-Stut
--
http://stut.net/
Stut napsal(a):
On 22 Oct 2008, at 22:19, Martin Zvarík wrote:
I became confused after an hour trying to understand the PHP cache
solutions.
XCache, APC, eAccelerator and others are opcode cache systems...
is memcache in the same category? or is it completely different?
Memcache is completely different in that it's not an opcode cache,
it's an in-memory volatile cache for arbitrary key => value data
with a client-server API.
If I install for example XCache, set it for certain directory...
it will automatically cache the website into the memory. What
happens if the memory will get full?
First of all you need to get it clear in your head what an opcode
cache is actually doing. It does not "cache the website", it caches
the compiled version of the PHP scripts such that PHP doesn't need
to recompile each file every time it's included which is the
default way PHP works.
Secondly, if you run out of memory you buy more!! But seriously,
you'd need a very very very big site to have this problem. An
opcode cache of a PHP script will generally take less space than
the script itself. So if you're worried about it simply get the
total size of all the PHP scripts in your site and you'll see that
even on modest hardware you'll have a lot of headroom. Obviously
you need to take other users of the server into account, especially
if you're on a shared hosting account, but in most cases you won't
have a problem.
-Stut
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
