I don´t know how to access this user quota.
this is the message I get ...

need help !!!!!! :(

To: sys@domain.com
Subject: mysql is close to or over quota

mysql

is very near or over the disk space limit allocated on the Sun Cobalt server.
Once the quota limit is reached, no more data can be stored. Consider moving
some data to another location or increasing the limit.

Quota Limit: 30.00 MB
Quota Used: 28.81 MB
Percent Used: 96 %:(

try "man quota" and "man edquota" for some reading
with "edquota mysql" you can change the quota limits, where 0 is no quota afaik