> [mendola@bigfoot.com]
>
> Tomas Szepe wrote:
> >>[tgl@sss.pgh.pa.us]
> >>
> >>
> >>>indexes:
> >>>stats_min_pkey primary key btree (ip, "start")
> >>>stats_min_start btree ("start")
> >>>stats_hr_pkey primary key btree (ip, "start")
> >>>stats_hr_start btree ("start")
> >>
> >>>ip is of type "inet" in all tables.
> >>>start is of type "timestamp without time zone" in all tables.
> >>
> >>Okay, so a pkey index entry will take 32 bytes counting overhead ...
> >>you've got about 10:1 bloat on the stats_min indexes and 2:1 in stats_hr.
> >>Definitely bad :-(
> >
> >
> >The only difference between the way stats_min and stats_hr are updated
> >stems from the fact that stats_min only holds records for the last 1440
> >minutes (because of its killer time granularity), whereas stats_hr
> >holds its data until we decide some of it is obsolete enough and
> >issue a "delete from" by hand.
>
> Are you sure that all indexes are needed and that a partial index could
> not help ? What about the statistics on these indexes ? Are they really
> used ?
Yup, they're all essential. :(
--
Tomas Szepe <szepe@pinerecords.com>
