Re: sort_mem statistics ...

On Tue, 18 Oct 2005, Tom Lane wrote:

> "Marc G. Fournier" <scrappy(at)postgresql(dot)org> writes:
>> do we maintain anything anywhere for this? mainly, some way of
>> determining # of 'sorts to disk' vs 'sort in memory', to determine whether
>> or not sort_mem is set to a good value?
>
> As of 8.1 you could turn on trace_sort to collect some data about this.
>
> Looking at the code, I notice that the messages are all emitted at level
> NOTICE. Perhaps that was not such a good idea --- it'd be pretty much
> in-your-face if it were on all the time. Does anyone think it'd be a
> good idea to emit the trace_sort messages at level LOG, instead?

If someone sets trace_sort, does it matter what level its emit'd at? Its
not on by default, at least :)

----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy(at)hub(dot)org Yahoo!: yscrappy ICQ: 7615664