On Tue, Oct 6, 2009 at 3:28 AM, keshav upadhyaya <ukeshav2009@gmail.com> wrote:
> First question - i want to know the role played by
>
> #fsync = on and
> #synchronous_commit = on
These configurations are discussed here:
http://developer.postgresql.org/pgdocs/postgres/runtime-config-wal.html
> I want to understand more in details what exactly had happened one is made
> them "off" , is it dangerous to do this ? as it will not sync the data in
> each commit .
>
There's plenty of discussion in the documentation and the list
archives about the
risks of disabling fsync and/or synchronous commit. Here's one:
http://archives.postgresql.org/pgsql-performance/2006-04/msg00631.php
If you're struggling with performance issues, I'd post a detailed
description of
your problem and what you've tried so far to the -performance list, instead of
turning fsync off.
Josh
