Housekeeper issue

[g3ph4z]

Hello Guys,

First of all, my english is pretty bad, so sorry for my english mistakes.

The zabbix get 124 data per second and the databases (postgresql) is around ~70GB.
I configured the housekeeper to delete every data what is older than 90 days.

After few weeks, the database is getting bigger.

I can see this in the log:

6211:20180531:103436.667 housekeeper [deleted 3002 hist/trends, 0 items/triggers, 142 events, 70 problems, 5 sessions, 0 alarms, 5 audit items in 2.651768 sec, idle for 1 hour(s)]

I already tried this:

delete FROM alerts where age(to_timestamp(alerts.clock)) > interval '90 days';

delete FROM acknowledges where age(to_timestamp(acknowledges.clock)) > interval '90 days';

delete FROM events where age(to_timestamp(events.clock)) > interval '90 days';

delete FROM history where age(to_timestamp(history.clock)) > interval '90 days';
delete FROM history_uint where age(to_timestamp(history_uint.clock)) > interval '90 days' ;
delete FROM history_str  where age(to_timestamp(history_str.clock)) > interval '90 days' ;
delete FROM history_text where age(to_timestamp(history_text.clock)) > interval '90 days' ;
delete FROM history_log where age(to_timestamp(history_log.clock)) > interval '90 days' ;

delete FROM trends where age(to_timestamp(trends.clock)) > interval '90 days';
delete FROM trends_uint where age(to_timestamp(trends_uint.clock)) > interval '90 days' ;

and this deleted 0 (zero) lines. So I tried with 155 days instead of 90 and deleted some lines, but the DB size is same.
but NOW its do nothing with 155 days

How can I remove the old data?

UPDATE:
Its my fault, I checked the first lines of the tables and no one of lines older than 90 days, so other question:
How can I reduce the database size?