Workbench makes too much disk usage on mysql connect

[Filipe C]

Hi,
now that i 've upgrade to ubuntu 12.04, with workbench 5.2.47 and mysql 5.5.29-0ubuntu0.12.04.2, every time that workbench connects to mysql, it makes HEAVY use of the disk, like about 2x minutes;

processlist on mysql shows nothing:

mysql> show processlist;
+----+------+-----------------+------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+-----------------+------+---------+------+-------+------------------+
| 42 | root | localhost:47976 | he | Sleep | 5 | | NULL |
| 43 | root | localhost:47977 | he | Sleep | 122 | | NULL |
| 44 | root | localhost | NULL | Query | 0 | NULL | show processlist |
+----+------+-----------------+------+---------+------+-------+------------------+


This is really annoying and not disk friendly;
what can i do ?