Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4

On Fri, 13 Mar 2009, Jignesh K. Shah wrote:

> I can use dbt2, dbt3 tests to see how 8.4 performs and compare it with
> 8.3?

That would be very helpful.  There's been some work at updating the DTrace
capabilities available too; you might compare what that's reporting too.

> * Visibility map - Reduce Vacuum overhead - (I think I can time vacuum with
> some usage on both databases)

The reduced vacuum overhead should show up as just better overall
performance.  If you can seperate out the vacuum specific time that would
be great, I don't know that it's essential.  If the changes don't just
make a plain old speed improvement in your tests that would be a problem
worth reporting.

> * Parallel pg_restore (Can be tested with a big database dump)

It would be particularly useful if you could throw some of your 32+ core
systems at a parallel restore of something with a bunch of tables.  I
don't think there have been (m)any tests of that code on Solaris or with
that many restore workers yet.

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD