As a side note, if I deactivate BP and run just WPMU, the site is nice and snappy immediately…
So on that basis I guess the next step is run through the plugins one by one to try and see if it’s a particular plugin that causes speed issue?
Have tried that aswell, deactivated all plugins except BP, and still same issue.
Running some further tests, it seems to have extremely long TTFB time when loading pages. I have activated object caching etc in W3, but not really seen any measurable change in the sites performance from it…
Not sure the answer to his other than further deep testing to establish the exact reason, I tend to experience the same sort of lag that you speak of but not necessarily so long.
Will have to dig a little more… seeing TTFB times OVER NINE THOUSAND!! (literally… 9358ms)
It’s a weird problem indeed.. Looking at your site in firebug (using the “net” tab) I see one certain element popping out which seems to be the cause of the problem. This are the details:
`
Date Fri, 01 Oct 2010 10:59:12 GMT
Server Apache/2.2.8 (Ubuntu) mod_jk/1.2.25 mod_python/3.3.1 Python/2.5.2 PHP/5.2.4-2ubuntu5.10 with Suhosin-Patch mod_ssl/2.2.8 OpenSSL/0.9.8g mod_perl/2.0.3 Perl/v5.8.8
X-Powered-By W3 Total Cache/0.9.1.3
X-Pingback http://liveview.no/xmlrpc.php
Set-Cookie bp-message=deleted; expires=Thu, 01-Oct-2009 10:59:17 GMT; path=/ bp-message-type=deleted; expires=Thu, 01-Oct-2009 10:59:17 GMT; path=/
Last-Modified Fri, 01 Oct 2010 10:59:19 GMT
Vary Accept-Encoding,Cookie
Expires Fri, 01 Oct 2010 11:59:19 GMT
Pragma public
Cache-Control public, must-revalidate, proxy-revalidate
Content-Encoding gzip
Content-Length 4953
Keep-Alive timeout=15, max=98
Connection Keep-Alive
Content-Type text/html; charset=UTF-8
`
I’ve seen this on my site as well (the very long response time on initial page load) and I have almost exactly the same setup as yours. I “solved” the problem by adding more Ram to my server, and could not find the problem (if there actually is one).
Good luck
Which element in there is it you’re thinking of?
I really don’t know.. I’m a complete server n00b to be honest.. With my limited knowledge nothing really sticks out as a problem.. that’s why I gave up.. maybe an expert has an idea?
I’m seeing this type of performance as well — except that it varies greatly for no apparent reason. It seems to be running relatively fine and then go into spats of incredibly slow response times (sometimes in the 20 second range for a page that normally takes 2 seconds to render.)
