I'm trying to use IIRF under IIS6.0 on windows 2003 x64 but i'm experiencing serious performance problems. Are there any gotcha's that you need to be aware of when using IIRF?
When load testing without IIRF filter on according to perf mon each server is handling 600 asp.net requests/sec, when the filter is in place this goes down to somewhere in the region of 60... :O
IIRF is only on one website with a dedicated app pool running 4 worker processes
NotifyLog is Off, RewriteLogLevel is 0
There are about 20 rewrite rules and 3 redirect rules
All the rules are set to Last Test if matched and the IterationLimit is set to 1
Any help would be greatly appreciated :)