Re: WAL Rate Limiting

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От Jeff Janes
Тема Re: WAL Rate Limiting
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Msg-id CAMkU=1zCsR8FV=p5w2pms5UK5wXKbRDBu7Zc7GwPESk1B3MXTQ@mail.gmail.com
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Ответ на Re: WAL Rate Limiting  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Thu, Jan 16, 2014 at 8:19 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:

> I think the usecases that would want this for DML probably also wan this
> to work for unlogged, temp tables.

Huh?  Unlogged tables generate *zero* WAL, by definition.

Transactions that only change unlogged tables still generate commit records to WAL.

I don't think that amount of WAL is particularly relevant to this discussion, but I was recently surprised by it, so wanted to publicize it.  (It was causing a lot of churn in my WAL due to interaction with archive_timeout)
 
Cheers,

Jeff

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