Re: Streaming replication, and walsender during recovery

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От Josh Berkus
Тема Re: Streaming replication, and walsender during recovery
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Msg-id 4B61EE0C.4090104@agliodbs.com
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Ответ на Re: Streaming replication, and walsender during recovery  (Simon Riggs <simon@2ndQuadrant.com>)
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Guys,

> Hmm, I'm sorry but that's bogus. Retaining so much WAL that we are
> strongly in danger of blowing disk space is not what I would call a
> safety feature. Since there is no way to control or restrain the number
> of files for certain, that approach seems fatally flawed. Reducing
> checkpoint_timeout is the opposite of what you would want to do for
> performance.

Which WAL are we talking about here?  There's 3 copies to worry about:

1) master WAL
2) the archive copy of WAL
3) slave WAL

--Josh Berkus

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