Re: sharp or fuzzy checkpoint?

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От Bruce Momjian
Тема Re: sharp or fuzzy checkpoint?
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Msg-id 200202240400.g1O405T13142@candle.pha.pa.us
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Ответ на sharp or fuzzy checkpoint?  (Tatsuo Ishii <t-ishii@sra.co.jp>)
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Tatsuo Ishii wrote:
> I'm interested in point-in-time-recovery (or archive recovery) too.
> I'm wondering current implementation of CHECKPOINT is whether "SHARP"
> or "FUZZY" checkopint. If it's a "SHARP" one, it would be a serious
> performance bottle neck according to the Gray's transaction book. Does
> anybody know anything about that?

We have a FUZZY checkpoint because we continue processing during
the checkpoint period.  In fact, we can add WAL files during the
checkpoint activity.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
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