title: Session table size too big in joomla 2.5
body: <p>I have one news site using joomla 2.5. Yesterday I noticed the database size. It is over 800 MB. Then I checked the database, and I found one table (session table) is really big in size. I searched for a solution via Google and found that Joomla will create &amp; destroy sessions  automatically. I changed the session handler to 'none', but joomla is still creating sessions in the database. It is not deleting records from session table automatically. This size of the database is increasing day by day. How can I fix that? </p>