On Wed, Dec 20, 2006 at 08:10:56PM +0900, Takayuki Tsunakawa wrote:
> One question is the disk utilization.  While bgwriter is fsync()ing,
> %util of WAL disk drops to almost 0.  But the the bandwidth of
> Ultra320 SCSI does not appear to be used fully.  Any idea?

That implies that fsyncing a datafile blocks fsyncing the WAL. That
seems terribly unlikely (although...). What OS/Kernel/Filesystem is
this. I note a sync bug in linux for ext3 that may have relevence.

Have a nice day,

Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to 
> litigate.

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