Your patch has been added to the PostgreSQL unapplied patches list at:
http://momjian.postgresql.org/cgi-bin/pgpatches
It will be applied as soon as one of the PostgreSQL committers reviews
and approves it.
---------------------------------------------------------------------------
Heikki Linnakangas wrote:
> Here's a patch that:
>
> Moves the logic to find a page with enough room from _bt_insertonpg to a
> new function, _bt_findinsertloc. It makes the code more readable, and
> simplifies the forthcoming Grouped Index Tuples patch.
>
> Also, the insert location within page used to be calculated twice for
> unique indexes, once in _bt_checkunique and second time in
> _bt_insertonpg. That's a waste of cycles, and this patch fixes that.
>
>
> I couldn't measure a difference with pgbench, but this micro-benchmark
> shows it:
>
> > psql postgres -c "CREATE TABLE inserttest (i int PRIMARY KEY);"
> > psql postgres -c "TRUNCATE inserttest; checkpoint;"; sync
> > time ~/pgsql.cvshead/bin/psql postgres -c "TRUNCATE inserttest;
> INSERT INTO inserttest SELECT a FROM generate_series(1,1000000) a;"
>
> Without patch: real 0m7.260s
> With patch: real 0m6.963s
>
> On my laptop, fsync=off, full_page_writes=off, checkpoint_segments = 10,
> to remove any other variables.
>
> It's not a huge difference, but it's worth having, and performance
> wasn't the main motivation of the patch anyway.
>
> --
> Heikki Linnakangas
> EnterpriseDB http://www.enterprisedb.com
>
> ---------------------------(end of broadcast)---------------------------
> TIP 7: You can help support the PostgreSQL project by donating at
>
> http://www.postgresql.org/about/donate
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
