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 <email@example.com> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to > litigate.
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