Re: Enhancement request

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On Dec 2, 2007 6:31 AM, Alvaro Herrera <alvherre@xxxxxxxxxxxxxx> wrote:
Joshua D. Drake escribió:
> On Fri, 30 Nov 2007 19:34:02 -0300
> Alvaro Herrera <alvherre@xxxxxxxxxxxxxx> wrote:
>
> > Joshua D. Drake escribió:
> >
> > > The multi-worker autovacuum is a great new addition to help part of
> > > that problem (starvation) but it is not help against the other
> > > (resource consumption, specifically IO).
> >
> > Huh, autovac will consume exactly the same amount of I/O as a
> > user-induced vacuum, so I don't see your point.
>
> It can be determined "when" the I/O is used.

Future plans call for being able to change autovac parameters depending
on time of day, so you will be able to decide that using autovacuum too.

> > Remember, we're not adding VACUUM SCHEMA in 8.2 so it doesn't make any
> > sense to try to compare it against the old autovac.  And you can bet
> > that in 8.4 autovac will have even more goodies.
>
> I assume you mean 8.3, but that is certainly a valid point.

No, I meant 8.4 --- the feature set of 8.3 is already set on stone.  So
VACUUM SCHEMA has to compete with whatever we're able to do for the
release following that one.

i think even when autovacuum is uber-perfect , the manual overriding commands like VACUUM and utilities like VACUUMDB will still exist for a long time to come, so there is a case of improving them if required.  Maybe it would be just easier to add a schema switch to VACUUMDB, which can just query the catalogs to find which tables to vacuum, this way no parser changes are involved or any tinkering with the backend code.



--
Alvaro Herrera                         http://www.advogato.org/person/alvherre
"Entristecido, Wutra                     (canción de Las Barreras)
echa a Freyr a rodar
y a nosotros al mar"

---------------------------(end of broadcast)---------------------------
TIP 3: Have you checked our extensive FAQ?

              http://www.postgresql.org/docs/faq



--
Usama Munir Dar http://linkedin.com/in/usamadar
Consultant Architect
Cell:+92 321 5020666
Skype: usamadar

[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux