Re: pg_rewind and WAL size...

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От Michael Paquier
Тема Re: pg_rewind and WAL size...
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Msg-id CAB7nPqQuwVuGjKbMgyC+Ahe8g16ve8xBPjK8WRUSPniCtpYokA@mail.gmail.com
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Ответ на pg_rewind and WAL size...  (marin@kset.org)
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On Tue, Nov 22, 2016 at 9:40 PM,  <marin@kset.org> wrote:
> Am I doing something wrong? Would tweaking some checkpoint parameters help
> reduce the WAL volume?

The answer to this question is likely yes. wal_log_hints enforces a
FPW for the first modification of a page even if that's for some hint
bits. This generates traffic for OLTP types of workloads where many
pages are dirtied and flushed at checkpoint.
--
Michael


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