[updated 5/16/2010]
Memcached is a very popular open source object caching server. It was developed to speed up livejournal.com by Danga Interactive.  We use memcached for a lot of our sites.  We use it for different purposes but one main purpose is to cache query results so we don’t have to keep hitting database.  [...]

Installing mcache, previously known as msession, on CentOS 32 bit system.
If you are on 64 bit system, you will get errors, lots of them.  I went through and fixed “some” errors by modifying code but it was just taking too much time so I decided not to go 64 bit route.  But below are the [...]