Re: Performance Improvement by reducing WAL for Update Operation

On Tue, Feb  4, 2014 at 01:28:38PM -0500, Robert Haas wrote:
> Meanwhile, in friendlier cases, like "one short and one long field, no
> change", we're seeing big improvements.  That particular case shows a
> speedup of 21% and a WAL reduction of 36%.  That's a pretty big deal,
> and I think not unrepresentative of many real-world workloads.  Some
> might well do better, having either more or longer unchanged fields.
> Assuming that the logic isn't buggy, a point in need of further study,
> I'm starting to feel like we want to have this.  And I might even be
> tempted to remove the table-level off switch.

Does this feature relate to compression of WAL page images at all?

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
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