On 12/6/10 6:10 PM, Tom Lane wrote:
> Robert Haas <robertmh...@gmail.com> writes:
>> On Mon, Dec 6, 2010 at 9:04 PM, Josh Berkus <j...@agliodbs.com> wrote:
>>> Actually, on OSX 10.5.8, o_dsync and fdatasync aren't even available.
>>> From my run, it looks like even so regular fsync might be better than
>>> open_sync.
>
>> But I think you need to use fsync_writethrough if you actually want
>> durability.
>
> Yeah. Unless your laptop contains an SSD, those numbers are garbage on
> their face. So that's another problem with test_fsync: it omits
> fsync_writethrough.
Yeah, the issue with test_fsync appears to be that it's designed to work
without os-specific switches no matter what, not to accurately reflect
how we access wal.
I'll see if I can do better.
--
-- Josh Berkus
PostgreSQL Experts Inc.
http://www.pgexperts.com
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
