Kind of off-topic, but I've found that putting the history table on a separate 
spindle (using a separate tablespace) also helps improve performance.

--Richard



On Apr 8, 2010, at 12:44 PM, Robert Haas wrote:

> 2010/4/8 Merlin Moncure <mmonc...@gmail.com>:
>> previous to 8.2, to get good performance on zabbix you need to
>> aggressively vacuum the heavily updated tables yourself.
> 
> Generally if you DON'T vacuum aggressively enough, then vacuums will
> take a really long and painful amount of time, perhaps accounting for
> the "hang" the OP observed.  There's really no help for it but to
> sweat it out once, and then do it frequently enough afterward that it
> doesn't become a problem.
> 
> ...Robert
> 
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