I've installed it, the page generation time as decreased, BUT..
the browsing between the forum is kind of slow, and it some times have a delay time when browsing the forum, what may be the problem? when there is a delay the debug mode shows that the page was generated on a normal time, and this is weird .. cous there is an unexplained delay .. can you help me please?

Are you on a shared host or a dedicated server and how many users do you have online?

I'm on a dedicated server, I have 600 users online in 3600 sec' ..

visit the server optimization forum on vbulletin.com

my server is well optimized..

"when there is a delay the debug mode shows that the page was generated on a normal time, and this is weird .. cous there is an unexplained delay"

I don't really understand that...

crawl my site, you'll understand (it's in hebrew.. )
The index is not normal, all the names you are seeing are forums..
www.atraf-f.net

I just installed this on my site and so far so good. It's only been running for a few minutes but initial testing looks good. I see a lot of files in the templates directory. Site seems very fast with about 1000 users on right now. I'll give it some time tonight and see how it goes. I have cacti running on my machines watching everything include MySql so I'm curious if I'll see anything promising on the graphs.

I have eAccellerator as well so I'm going to be checking up on that. What do I look for there?

I haven't used eAcc in a long time but in xcache you show a list of all files that are being cached...

ok, in eAccellerator I can see both my photopost templates and my classifieds templates being cached, but I don't see anything from VB other than the normal php files. I will give it a while and clear out expired scripts to give it some room. Thanks for the quick response. I'm looking at Cacti right now and I'm seeing a good 40% drop in CPU load as we speak. I also watched my Load Average drop from 2.4 down to 0.5 in about 5 minutes. So far so good.

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on edit:

Ok, I just checked again, and all of the templates are in eAccel now. Everything going smooth and the server is sleeping!!! I need to put you on the payroll. GOOD STUFF, and thank you!