On Sat, Jul 21, 2012 at 4:16 PM, Ioannis Anagnostopoulos
<ioannis(at)anatec(dot)com> wrote:
> I am not sure that I can see an improvement, at least on src_id that have
> lots of msg_id per day the query never returned even 5 hours later running
> "exaplain analyze". For smaller src_id
> (message wise) there might be some improvement or it was just the analyse
> that I run. As I said the stats goes quickly out of scope because of the big
> number of updates. So it looks like that
> it is not the "funny" "where" concatenation or some kind of index
> construction problem. Which brings us back to the issue of the
> "statistics_target" on per column. My problem is that given the
> query plan I provided you yesterday, I am not sure which columns
> statistics_target to touch and what short of number to introduce. Is there
> any rule of thumb?
What's the size of your index, tables, and such?
In GB I mean, not tuples.