eva2000

What script that you used to view memcache stats? I'm interested
What about your experience with other cache :
- xcache
- apc
- eaccelerator
- file cache (i think file cache will increase CPU load because more I/O process??)

Can you tell me best options for litespeed.
- litespeed 2 / 4 cpu?
- suphp / dso / fastcgi?
- optimized memcache setting?

My forum is not too fast with memcache, compared when i used apc.

Atm i use litespeed 2 cpu, suphp, and memcache.
But i don't change any memcache setting. So it's still default i guess, because it is my host that installed it.

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When you install memcache php extension from source compile there is a memcache.php file you can setup and configure which shows those stats

If using single server then APC or Xcache would be faster than Memcached. You only need Memcached when you're using a PHP handler which doesn't support php opcode cachers like APC or Xcache i.e. suPHP and cgi PHP handlers don't support APC or Xcache for apache web servers and default Litespeed php suExec doesn't support APC or Xcache either so you need to use Memcached as I did above.

If you want to use APC or Xcache, then you need to switch to mod_php (DSO) or fastcgi for Apache or switch to mod_php (DSO) and disable php suExec for Litespeed.

As to number of cpus for Litespeed it's explained on my blog at here, need to leave a few cpu cores for PHP and other tasks, so cpu cores needed for Litespeed usually halve the number of total cpu cores you have.

With Litespeed web server and mod_php (DSO) non php suExec or Nginx php-fpm best opcode PHP cacher i find is APC cache if single server setup.

If you have multiple web servers, you have no choice but to use Memcached as it's only one that has distributed caching support across multiple servers.

First client above had 2x load balanced Litespeed web servers with php non-suExec mod_php PHP handler but had to use 2x memcached servers per web server (2x2 = 4 memcached servers in total) for caching vB optimise/datastore to be able to share cache across 2x load balanced Litespeed web servers.

Second client single Litespeed web server with 2x memcached server instances.

Usually, for my paying private clients I install memcache php extension + memcached server from source compilation and configure them to support multiple memcached server instances per server.

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I think i have only 1 web server because i only have 1 physical server (am i correct? i don't know a lot about server things).

So i can run 2 memcache instances on 1 server?

Which one do you think will give best performance :
- suphp + memcache
- suphp + eaccelerator
- dso + apc
- dso + xcache

because i don't know whats the pros & cons between suphp & dso.

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Read about PHP handlers here DSO (mod_php) vs. CGI vs. suPHP vs. FastCGI | BoomShadow.net

suPHP is the slowest and most server resource consuming PHP handler of the lot. For both Litespeed and apache based servers it would be from fastest to slowest

mod_php > fastcgi -> suphp -> cgi

APC vs Xcache pretty close, just APC seems to have a bit more stability/compatibility with various PHP scripts than Xcache on Litespeed. So Litespeed + APC better. On Apache I prefer Xcache.

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Thanks.. All of your information really helps ! I will start contacting my host now.

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I've just switched from suPHP to DSO.
And i tried my 2 old APC scripts on different files : 1 for setting variable, 1 for getting variable.
But the getting variable is still failed from my litespeed. (memcache is active too).
Do you know why getting variable is failed?

Update : after i set vb optimise setting to "apc", from apc.php, misses rate is about 1-5%.

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double check you have PHP suExec disabled first you can use my mysqlmymonlite.sh script i mentioned at LiteSpeed Support Forums - View Single Post - High APC Fragmentation

Of course make sure you aren't using LSPHP with phpSuExec for opcode cache use. I have a mysqlmymonlite.sh script to check for that mysqlmymonlite.sh & mysqlmymon.sh server and mysql stats gathering tool

Code:

phpSuExec = 0

Code:

------------------------------------------------
Litespeed Server & LSAPI PHP Info:
------------------------------------------------
Litespeed web server version: 4.1.12
WHM / Cpanel version: 11.32.2.25

LSPHP phpSuExec status: 
  < phpSuExec >0
  < phpSuExecMaxConn >20

WHM's PHP Handler config:
/usr/local/cpanel/bin/rebuild_phpconf --current

Available handlers: dso cgi none
DEFAULT PHP: 5
PHP4 SAPI: none
PHP5 SAPI: dso
SUEXEC: enabled
RUID2: not installed

PHP 5.3.10 (litespeed) (built: Feb  7 2012 03:02:29)
Copyright (c) 1997-2004 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies

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Code:

root@mybox[~]# grep phpSuExec /usr/local/lsws/conf/httpd_config.xml
<phpSuExec>0</phpSuExec>
<phpSuExecMaxConn>10</phpSuExecMaxConn>

root@mybox[~]# /usr/local/cpanel/bin/rebuild_phpconf --current
Available handlers: suphp dso fcgi cgi none
DEFAULT PHP: 5
PHP4 SAPI: cgi
PHP5 SAPI: dso
SUEXEC: enabled
RUID2: not installed

I got the response above, is everything correct?

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Looks okay to me.. personally i disable PHP4 (concurrent php) when i compile PHP for whm/cpanel.

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Thanks. Any idea why my 2 apc scripts failed often when getting variable values?

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can you define what you mean by APC failed when testing the 2 scripts ? specific error messages etc ?

could be APC installed and configured incorrectly

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Originally Posted by eva2000

can you define what you mean by APC failed when testing the 2 scripts ? specific error messages etc ?

could be APC installed and configured incorrectly

I created 2 file :
1. First file contains apc_store()
2. Second file contains apc_fetch()

I opened first file, and opened second file. On most of the time (~90%), second file (apc_fetch) returns false.

But the other strange thing is, i & my members really feel that my forum is much faster than before i use APC.
But when it goes to admincp > vboptimise > system test, it failed on "getting data" test.

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Finally server testing went well after i flushed my APC cache from admincp.

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