Excerpts from Tom Lane's message of vie oct 29 14:15:55 -0300 2010:
> I wrote:
> > This is going to be dominated by constraint exclusion checking.
>
> Hmm, maybe I spoke too soon. With 9000 child tables I get a profile
> like this:
>
> samples % symbol name
> 447433 47.1553 get_tabstat_entry
Is there a reason for keeping the pgstat info in plain lists? We could
use dynahash there too, I think. It would have more palloc overhead
that way, though (hmm, but perhaps that can be fixed by having a smart
"alloc" function for it, preallocating a bunch of entries instead of one
by one).
--
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
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