DB issues vary by the database being used. Study the documentation for your database or check with your database administrator.
If you use the MySQL table type MyISAM (which is the default), and have deleted a large part of a table or if you have made many changes to a table with variable-length rows (tables that have VARCHAR, BLOB or TEXT columns), you must defragment the datafile (tables) with the "optimize" command.
You should try this if the mysqld daemon needs a lot of your CPU time. Optimize the tables - ticket, ticket_history and article (see Script below).
shell> mysql -u user -p database mysql> optimize table ticket; mysql> optimize table ticket_history; mysql> optimize table article;
Script: Optimizing data base tables.
PostgreSQL is best tuned by modifying the
postgresql.conf file in your PostgreSQL
data directory. For advice on how to do this, reference the following articles:
If performance is still not satisfactory, we suggest that you join the PostgreSQL Performance mailing list ( http://www.postgresql.org/community/lists/ ), and ask questions there. The folks on the PostgreSQL list are very friendly and can probably help.