Should be probably fixed together with ZBX-6541
Also - not everything older than the configured history of an item !
There is one sanity check to save performance if you for example change history/trends from 720 days to 2 days.
It will be deleted not in one go, but in several/many small batches.
This detail added to documentation:
https://www.zabbix.com/documentation/2.0/manual/appendix/config/zabbix_server
https://www.zabbix.com/documentation/2.2/manual/appendix/config/zabbix_server
(see 'HousekeepingFrequency' parameter description)
I'm happy with that 
(1) i was considering for some time whether we should add the same info to the config files to make them more useful & be more consistent.
i got to the conclusion that we should
sasha RESOLVED in:
- svn://svn.zabbix.com/branches/2.0 r44359:44360
- svn://svn.zabbix.com/branches/2.2 r44361
- svn://svn.zabbix.com/trunk r44362
please review
martins-v Looking good to me.
<richlv>
a) sorry for nitpicking, but "4xHousekeepingFrequency" doesn't look very readable to me. "4 x HousekeepingFrequency" is a bit strange as well, so i'd suggest to make it "4 times HousekeepingFrequency"
b) while we're at this, there is a line saying "Housekeeping is removing unnecessary information from history, alert, and alarms tables.". we don't have 'alarms' table, and this is missing quite a bunch of tables. we should either list all the tables or just change it to something more generic like "...removing outdated information from the database."
martins-v Introduced to:
- https://www.zabbix.com/documentation/2.4/manual/appendix/config/zabbix_server
- https://www.zabbix.com/documentation/2.4/manual/appendix/config/zabbix_proxy
(and also the same docs for 2.0, 2,2 and 3.0 branches). Please review. Again, for consistency, this would have to be synced with config files.
sasha Very good! But Zabbix proxy doesn't apply "4 times HousekeepingFrequency" for "each item". It applied for all values in history tables.
.. and "when history periods are greatly reduced" should be replaced by "when configuration parameters ProxyLocalBuffer or ProxyOfflineBuffer are greatly reduced"
martins-v Thanks, fixed according to suggestions: https://www.zabbix.com/documentation/2.4/manual/appendix/config/zabbix_proxy
RESOLVED.
sasha Thank you. CLOSED
(2) For consistency, this would have to be synced with config files.
sasha RESOLVED directly in 2.0, 2.2, 2.4 and trunk branches in r50247.
(2a) asaveljevs In trunk configuration file for proxy, it says "In this case the period of outdated history...". For server, it says "In this case the period of outdated information...". It should be "information" in both cases.
sasha RESOLVED in r50566.
asaveljevs CLOSED
(2b) asaveljevs Also, let's change "Housekeeper" to "the housekeeper". REOPENED.
sasha RESOLVED in 1.8, 2.0, 2.2, 2.4 and 3.0 documentation pages. Also changed "Housekepper Frequency" to "HousekepperFrequency" in 3.0.
asaveljevs Additionally changed "Housekeeper" to "housekeeper" at https://www.zabbix.com/documentation/2.4/manual/appendix/config/zabbix_server - that seems to have been missed. RESOLVED.
sasha Many thanks! CLOSED