A large number of entries in the so

A large number of entries in the social cloud becomes outdated
very soon, since users may switch from one session to another,
quit the system, and so on. We launch a cron job behind
the scene every 10 minutes to clear those outdated entries. For
example, for sessions of which everybody has left, their “Logs”
entries and all the associated “Message” entries are deleted in a
single transaction.