Re: Problems restoring big tables

Arnau <arnaulist@andromeiberica.com> writes:
>    I have to restore a database that its dump using custom format (-Fc)
> takes about 2.3GB. To speed the restore first I have restored everything
> except (played with pg_restore -l) the contents of some tables that's
> where most of the data is stored.

I think you've outsmarted yourself by creating indexes and foreign keys
before loading the data.  That's *not* the way to make it faster.

> pg_restore: ERROR:  out of memory
> DETAIL:  Failed on request of size 32.
> CONTEXT:  COPY statistics_operators, line 25663678: "137320348  58618027

I'm betting you ran out of memory for deferred-trigger event records.
It's best to load the data and then establish foreign keys ... indexes
too.  See
http://www.postgresql.org/docs/8.2/static/populate.html
for some of the underlying theory.  (Note that pg_dump/pg_restore
gets most of this stuff right already; it's unlikely that you will
improve matters by manually fiddling with the load order.  Instead,
think about increasing maintenance_work_mem and checkpoint_segments,
which pg_restore doesn't risk fooling with.)

            regards, tom lane