From: | Karl Denninger <karl(at)denninger(dot)net> |
---|---|
To: | Steve Crawford <scrawford(at)pinpointresearch(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Question regarding autovacuum |
Date: | 2007-08-28 21:17:43 |
Message-ID: | 46D490F7.90108@denninger.net |
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Thread: | |
Lists: | pgsql-general |
Steve Crawford wrote:
> Karl Denninger wrote:
>
>
>>> Are your FSM settings enough to keep track of the dead space you have?
>>>
>>>
>> I don't know. How do I check?
>>
>
> vacuum verbose;
>
> Toward the bottom you will see something like:
> ...
> 1200 page slots are required to track all free space.
> Current limits are: 453600 page slots, 1000 relations, using 2723 kB.
> ....
>
> Make sure your current limits have a higher number than the page slots
> required.
>
> Cheers,
> Steve
>
>
Am I correct in that this number will GROW over time? Or is what I see
right now (with everything running ok) all that the system
will ever need?
If the latter, then I'm WELL within limits and I guess I need to tune
the autovacuum parameters to be more aggressive; system views show it IS
being run.
INFO: free space map contains 5895 pages in 639 relations
DETAIL: A total of 14976 page slots are in use (including overhead).
14976 page slots are required to track all free space.
Current limits are: 179200 page slots, 1000 relations, using 1115 kB.
-- Karl Denninger
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