Thread:Extension talk:LDAP Authentication/LDAP Authentication + Apache2 High CPU Usage/reply

I find this extremely strange. I could see this happening if you were using auto-auth, but I can't see any reason for this to happen if you are just using normal LDAP authentication. The only time the LDAP code is being traversed is when you are logging in.

Notice that more content is sent, and less caching is done when a user is logged in. What kind of caching are you doing in your wiki? Are you using memcached? APC? Is your database on a separate server from the apache? Are you doing any caching via squid, or the file cache?