iRedAdmin extreme slow login.

==== Required information ====
- iRedMail version:0.8.4 and v1.6.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  Mysql
- Linux/BSD distribution name and version:  Centos 6.4
- Related log if you're reporting an issue:
====
Hello,

When i login to the iredadmin pro interface it takes a couple minutes to login.
I think that the problem is a giant quarantine amavisd sql table.
897 MB and 60852 rows
Do i need to clear the database manually?

Thanks

Jef