Vivek Khera wrote:
> >>>>> "BM" == Bruce Momjian <[EMAIL PROTECTED]> writes:
> >> Sounds reasonable to me.  Are there many / any scenarios where a plain 
> >> fsync would be faster than open_sync?
> BM> Yes.  If you were doing multiple WAL writes before transaction fsync,
> BM> you would be fsyncing every write, rather than doing two writes and
> BM> fsync'ing them both.  I wonder if larger transactions would find
> BM> open_sync slower?
> consider loading a large database from a backup dump.  one big
> transaction during the COPY.  I don't know the implications it has on
> this scenario, though.

COPY only does fsync on COPY completion, so I am not sure there are
enough fsync's there to make a difference.

  Bruce Momjian                        |
  [EMAIL PROTECTED]               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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