HELP! Extended delay in thread re-load after post

[linuxkidd]

Hello all,
I manage a vb4.08 install for an RV Owners club. Since we've been on our latest host ( since August ), we've had an issue of insanely long delays after posting a reply or new thread.

I've done packet captures and watched the developer tools in FF and Chrome and found that the delay isn't in posting the data and waiting for a response... The delay is actually in the query for the original thread after the post has been submitted. This delay can be as short as 10 seconds or so.. but as long as 50 to 90 seconds!

I've performed all the optimizations I've been able to find online ( moving as much to filesystem as possible, disabling gzip in vB since mod_deflate is enabled on the host, converting DB engine to InnoDB, extending Thread cache time, adjusting cache timeout values in the .htaccess file, etc.. ) and thought that it was better...

But now, during peak usage the delay is back on posting. The delay does NOT seem to affect quick reply, at least not as consistently as it does the advanced reply or new thread posting. The delay exists even during off-peak times! Nothing else on the forum is slow. Nothing.. I would expect if server load was an issue ( which it has been in the past ), all activity would be slow.

We're currently hosted on a ESX 3.5i VM w/ 2 vCPUs, 2Gb of Ram running on CentOS 5.5 with apache 2.2.16 and php-5.2.14 ( RPM's from the utterramblings repo ).

Any ideas would be greatly appreciated...

Thanks!
LK