Re: \d on database with a lot of tables is slow

On Sun, Sep 25, 2005 at 10:10:22AM +0300, Hannu Krosing wrote:
> On L, 2005-09-24 at 18:59 -0500, Jim C. Nasby wrote:
> > I have a client with a database that contains 4000 relations according
> > to vacuum verbose, and \d in psql is painfully slow. In particular...
> > 
> >    ->  Seq Scan on pg_class c  (cost=0.00..2343.09 rows=6124 width=73) (actual time=0.325..22100.840 rows=16856
loops=1)
> >          Filter: (((relkind = 'r'::"char") OR (relkind = 'v'::"char") OR (relkind = 'S'::"char") OR (relkind =
''::"char"))AND pg_table_is_visible(oid))
 
> > 
> > That's off my laptop, but they're seeing similar issues on an 8-way
> > Opteron as well...
> 
> I expext the issue on 8-way opteron to be more of a high load than slow
> scan. It seems that sometimes a database with lots of activity slows
> down considerably. I suspect some locking issues, but I'm not sure this
> is the case.

No temp tables in use. The issue didn't appear to be load-dependant,
either.
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461