[Plugin: W3 Total Cache] Performance increase after W3TC update from 0.9.2.2 to 0.9.2.3

Hi,
we updated our wpmu install to the 9.2.3 version and have seen a proper increase in cpu and memory usage. Even though we have a 8-core 32GB dedicated server, this nearly brought the machine to a halt and it frequently restarted 🙁

The Apache memory usage increased 3-fold and the mysql cpu usage increased to 2.5 times what it was before. (load average was usually 4-6, with the updated version it was 20 – 40)

We did not upgrade or change anything else on the system.

Today after playing around with the settings we finally decided to roll it back to 0.9.2.2 and within a minute the load was down to the levels we had before.

We use the
– page cache – disk enhanced
– database cache – memcached
– browser cache
– minify – only for html since all other options had some issues before anyway.

No changes had been made to the w3tc settings after we upgraded, except to the .htaccess rules – we updated those as requested after the upgrade.

Let me know Frederick if you need any more details to help find out why this happened.

Anyone else had a similar experience?

Thanks

http://wordpress.org/extend/plugins/w3-total-cache/