OK, it happened again.

In that state:

httpd ~330MB
Threads: 500
User Objects: 423
Handles: 2,530
GDI Objects: 4
Context Switches: 28,475
[download]

On reload:

~28-50MB pretty quick and growing
Threads: 502
User Objects: 3-15 pretty quick
Handles: 902
GDI Objects: 4
Context switches: 325-3000
[download]

I got this using TaskManager and ProcessExplorer. I also took a trace using StraceNT, but it doesn't mean anything to me.

Does anyone know where limits would be set? I have plenty of memory 4GB, and a postgresql process can go up to 756MB.