From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com> |
Cc: | Teodor Sigaev <teodor(at)sigaev(dot)ru>, Jan Urbański <wulczer(at)wulczer(dot)org>, Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: gincostestimate |
Date: | 2010-10-18 00:56:56 |
Message-ID: | 26316.1287363416@sss.pgh.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com> writes:
> On Wed, Sep 8, 2010 at 1:02 AM, Teodor Sigaev <teodor(at)sigaev(dot)ru> wrote:
>> Fixed, and slightly reworked to be more clear.
>> Attached patch is based on your patch.
> The stats page is updated only in VACUUM. ANALYZE doesn't update
> the information at all.
ANALYZE doesn't scan indexes, so it's not realistic to expect ANALYZE to
update these numbers.
In addition, REINDEX, VACUUM FULL, and
> CLUSTER reset the information to zero, but the reset is not preferable.
> Is it possible to fill the statistic fields at bulk index-build?
I fixed that and committed it. It probably wouldn't be a bad idea for
Teodor or Oleg to double-check where I put in the counter increments;
although I did test that they matched the results of VACUUM for a
reasonably large GIN index.
> We don't have any methods to dump the meta information at all.
> They might be internal information, but some developers and
> debuggers might want such kinds of tools. Contrib/pageinspect
> might be a good location to have such function; it has bt_metap().
That seems like a good idea, but I haven't done it.
regards, tom lane
From | Date | Subject | |
---|---|---|---|
Next Message | KaiGai Kohei | 2010-10-18 00:57:53 | Re: security hook on table creation |
Previous Message | Greg Smith | 2010-10-18 00:20:14 | Re: ask for review of MERGE |