Debugging slow Bugzilla form submission on Debian Squeeze

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http://serverfault.com – I'm running 64-bit Debian Squeeze and I've installed bugzilla from the repositories. This action has auto-configured and installed: Bugzilla MySQL Ver 14.14 Distrib 5.1.63 Apache 2.2.16-6+squeeze8 When I browse my Bugzilla web interface I find that navigation is very fast, but adding new bugs or comments is very slow (10s+). I've tried the following things to rectify the issue: Configured Bugzilla to use mod_perl rather than mod_cgi. The navigation speeded up a little, but form submission remained slow. Threw more resources at the (virtual) server. It now has two CPU cores a (HowTos)