Re: BUG #2428: ERROR: out of memory, running INSERT SELECT

On Thu, 2006-05-11 at 20:14 -0400, Tom Lane wrote:
> Casey Duncan <casey@pandora.com> writes:
> > On May 11, 2006, at 4:42 AM, Simon Riggs wrote:
> >> As your database is defined, this SQL statement will return
> >> approximately 4 trillion rows, by my calculation. As you say, it
> >> returns no rows at all when the database is empty.
>
> > *slaps forehead* I totally missed the "!=" in the where clause, Doh!
> > Thanks for hitting me with a clue-stick.
>
> I'm still wondering why you got "out of memory", though.  I'd have
> expected that to grind for a really long time, gradually filling your
> disk, until you got an out-of-disk-space kind of error; if you didn't
> notice and stop it first.  There aren't (supposed to be) any long-term
> memory leaks in query processing, other than than the known issue of
> pending trigger events, which you say you haven't got on this table.

Seems broken either way, OOM or OOD. We need a way to stop runaway
queries from happening in the first place.

--
  Simon Riggs
  EnterpriseDB          http://www.enterprisedb.com