Re: WAL & SHM principles - Mailing list pgsql-hackers

From Tom Lane
Subject Re: WAL & SHM principles
Date
Msg-id 9678.983982097@sss.pgh.pa.us
Whole thread Raw
In response to Re: WAL & SHM principles  (Bruce Momjian <pgman@candle.pha.pa.us>)
Responses Re: WAL & SHM principles  (Bruce Momjian <pgman@candle.pha.pa.us>)
Re: WAL & SHM principles  (ncm@zembu.com (Nathan Myers))
List pgsql-hackers
Bruce Momjian <pgman@candle.pha.pa.us> writes:
> The only problem is that we would no longer have control over which
> pages made it to disk.  The OS would perhaps write pages as we modified
> them.  Not sure how important that is.

Unfortunately, this alone is a *fatal* objection.  See nearby
discussions about WAL behavior: we must be able to control the relative
timing of WAL write/flush and data page writes.
        regards, tom lane


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