Saturday, September 6, 2008

Re: [HACKERS] reducing statistics write overhead

Alvaro Herrera <> writes:
> Some sort of "if stats were requested in the last 500 ms, just tell the
> requester to read the existing file".

> Things that come to mind:

> - autovacuum could use a more frequent stats update in certain cases

BTW, we could implement that by, instead of having a global tunable,
including a field in the request message saying how stale an existing
file is acceptable for this requestor. 500ms might be the standard
value but autovac could use a smaller number.

regards, tom lane

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