On 04/29/2015 10:35 AM, ktm@xxxxxxxx wrote:
On Wed, Apr 29, 2015 at 07:07:04AM -0700, Joshua D. Drake wrote:
On 04/29/2015 01:08 AM, Andres Freund wrote:
Which OS and filesystem is this done on? Because many halfway modern
systems, like e.g ext4 and xfs, implement this in the background as
'delayed allocation'.
Oh, it's in the subject. Stupid me, sorry for that. I'd consider testing
how much better this behaves under a different operating system, as a
shorter term relief.
This is a known issue on the Windows platform. It is part of the
limitations of that environment. Linux/Solaris/FreeBSD do not suffer
from this issue in nearly the same manner.
jD
You might consider a CLUSTER or VACUUM FULL to re-write the table with
less fragmentation.
Or pg_repack if you can't handle the lockup time that these involve.
cheers
andrew
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