Re: vacuum, performance, and MVCC

> The example is a very active web site, the flow is this:
> 
> query for session information
> process HTTP request
> update session information
> 
> This happens for EVERY http request. Chances are that you won't have
> concurrent requests for the same row, but you may have well over 100 HTTP
> server processes/threads answering queries in your web server farm.

You're crazy :)  Use memcache, not the DB :)

Chris