[horde] Problem upgrading horde-webmail from 1.2.5 to 1.2.6

[Marco]

Jan Schneider <jan <at> horde.org> writes:
[...]
> There shouldn't be duplicate entries for the same session id in the  
> sessionhandler tables. This is going to break stuff, that's why it's  
> supposed to be a primary key.
> Since you don't want your users to be logged in during an upgrade  
> anyway, you can empty the sessionhandler table before the upgrade.

Ok, I'll use this method to avoid any problems.
But I'm also looking for an alternative for InnoDB mysql sessionhandler. I see
this table increase continuously. I have to OPTIMIZE every day the table to
reduce from 20GB to 2GB... 

Thank you very much
Regards
Marco