zimbra CRITICAL DATABASE ALERT LDAP primary MDB database is 90% full

I moved zimbra folder to another partition and created symlink from /opt/zimbra to /home/zimbra. After that, all services started without problems, but every 30 minutes I am receiving on my email "CRITICAL DATABASE ALERT" from zimbra server. The solution finded in zimbra support forum: Login as zimbra user and:

 # update database size  
 zmlocalconfig -e ldap_db_maxsize=67108864  
 # update log size  
 zmlocalconfig -e ldap_accesslog_maxsize=536870912  
 # allow time for zmconfigd to apply new setting (as suggested by Quanah)  
 sleep 90  
 # stop slapd  
 ldap stop  
 # change to database directory  
 cd /opt/zimbra/data/ldap/mdb/db  
 # backup database  
 /opt/zimbra/libexec/zmslapcat /opt/zimbra/data/ldap/mdb/db  
 # move to .old  
 mv data.mdb data.mdb.old  
 # recreate database with new size and restore from backup  
 /opt/zimbra/openldap/sbin/slapadd -q -b "" -F /opt/zimbra/data/ldap/config -l /opt/zimbra/data/ldap/mdb/db/ldap.bak  
 # start slapd  
 ldap start  
 # archive original  
 gzip data.mdb.old