On Tue, Aug 12, 2014 at 7:16 AM, Rosali myroundcube@mail4us.net wrote:

Does Roundcube its own garbage collection for expired entries in 'cache' table or do I have take care on my own for that?

Yes, it has. See https://github.com/roundcube/roundcubemail/blob/master/program/lib/Roundcube...

This is triggered by PHP's session garbage collector routine and therefore depends on the session.gc_* settings. You can also execute it manually or via cron job using bin/gc.sh

Best, Thomas