Horton

Re: WAL fsync scheduling

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Bruce Momjian <pgman@candle.pha.pa.us>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2000-11-18T05:15:38Z
Lists: pgsql-hackers 
Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Other backend will see they are not the lowest
> WAIT_ON_FSYNC and will wait for their byte to be set to NOT_IN_COMMIT
> so they can then continue, knowing their data was synced.

How will they wait?  Without a semaphore involved, your answer must
be either "timed sleep" or "busy-wait loop", neither of which is
attractive ...

			regards, tom lane