Bruce,
> We don't actually extend the WAL file during writes (preallocated), and
> the access/modification timestamp is only in seconds, so I wonder of the
> OS only updates the inode once a second. What else would change in the
> inode more frequently than once a second?
What about really big writes, when WAL files are getting added/recycled?
--
-Josh Berkus
Aglio Database Solutions
San Francisco