Re: Vacuum problem due to temp tables

Bhakti Ghatkar <bghatkar(at)zedo(dot)com> writes:
> We were running full vacuum on DB when we encountered the error below;

> INFO: vacuuming "pg_catalog.pg_index"
> *vacuumdb: vacuuming of database "rpt_production" failed: ERROR: duplicate
> key value violates unique constraint "pg_index_indexrelid_index"*
> DETAIL: Key (indexrelid)=(2678) already exists.

That's pretty bizarre, but what makes you think it has anything to do
with temp tables? OID 2678 is pg_index_indexrelid_index itself.
It looks to me like you must have duplicate rows in pg_index for that
index (and maybe others?), and the problem is exposed during vacuum full
because it tries to rebuild the indexes.

Could we see the output of

select ctid,xmin,xmax,* from pg_index where indexrelid in
(select indexrelid from pg_index group by 1 having count(*)>1);

regards, tom lane