Zabbix cleanup (odstranění starých dat)

SET @history_interval = 7;
SET @trends_interval = 90;

DELETE FROM alerts WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);
DELETE FROM acknowledges WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);
DELETE FROM events WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);

DELETE FROM history WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);
DELETE FROM history_uint WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);
DELETE FROM history_str WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);
DELETE FROM history_text WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);
DELETE FROM history_log WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@history_interval * 24 * 60 * 60);

DELETE FROM trends WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@trends_interval * 24 * 60 * 60);
DELETE FROM trends_uint WHERE (UNIX_TIMESTAMP(NOW()) - clock) > (@trends_interval * 24 * 60 * 60);

TRUNCATE TABLE history_uint;
TRUNCATE TABLE history;
TRUNCATE TABLE trends_uint;
TRUNCATE TABLE trends;
TRUNCATE TABLE events;
TRUNCATE TABLE alerts;
TRUNCATE TABLE acknowledges;
TRUNCATE TABLE history_str;
TRUNCATE TABLE history_text;
TRUNCATE TABLE history_log;