Since I was having problems with the OpenLDAP proxy cache, I decided to stress test Sun ONE with the kind of traffic it would get from Sendmail. Turns out that it’s barely noticeable.
I updated all our LDAP records for the proper mail routing information and then wrote a script that selects a username or list name at random, one of our LDAP-routable domains, combines them, and asks for a few attributes. About 10% of the time it generates a random nonexistent address and asks for that. Then it waits for a random amount of time between 0 and 1 seconds (or 0.5 seconds on another test) before asking for another.
It maybe adds about 0.01 to 0.05 to the average 1 minute load average. Still we’re sitting at over 50% idle most of the time and below a load average of 0.50 except when I do the NIS dumps every 15 minutes (and it goes up to 0.60 to 0.70).
I think the proxy cache is not needed.
Posted by Rowan Littell at April 1, 2005 11:19 AM