On Wed, Dec 20, 2006 at 09:14:50PM +0900, Takayuki Tsunakawa wrote:
> > 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.
>
> Oh, really? What bug? I've heard that ext3 reports wrong data to
> iostat when it performs writes (the data is correct when performing
> reads.)
I was referring to this in the 2.6.6 changelog:
http://www.linuxhq.com/kernel/changelog/v2.6/6/index.html
ext3's fsync/fdatasync implementation is currently syncing the inode via a full journal commit even if it was
unaltered.
However you're running a later version so that's not it.
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.