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

On Mon, Sep 26, 2005 at 03:00:44PM -0400, Tom Lane wrote:
> "Jim C. Nasby" <jnasby(at)pervasive(dot)com> writes:
> >>> I have a client with a database that contains 4000 relations according
> >>> to vacuum verbose, and \d in psql is painfully slow. In particular...
>
> It's presumably mostly in the pg_table_is_visible() calls. Not sure if
> we can do much to speed those up, but: how many schemas in your search
> path? What's the distribution of pg_class entries among the schemas?

db=# show search_path;
decibel, pg_sysviews, information_schema, rrs, public

db=# select schema_name, count(*) from pg_user_tables group by schema_name;
public | 764
ledger | 6
state | 2
_track_replica | 10
repair | 3
summarized | 586
orders | 512
snapshot | 1012
acl | 10

db=#

Also, do you have any idea on the 'Did not find relation named
"table-thats-there"' error? table-thats-there isn't a temp table, and I don't
believe they're even using temp tables, so I don't think that's the issue.
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461