Re: Vacuum problem due to temp tables - Mailing list pgsql-performance

Bhakti Ghatkar <bghatkar@zedo.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