On 14/09/2010, at 10:37 AM, Yaroslav Tykhiy wrote:
On 14/09/2010, at 12:41 AM, Tom Lane wrote:
Yaroslav Tykhiy y...@barnet.com.au writes:
[...]
I think the major problem you're having is that the planner is
completely clueless about the selectivity of the condition
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From: y...@barnet.com.au
To: pgsql-general@postgresql.org
Subject: [GENERAL] Query plan choice issue
Date: Mon, 13 Sep 2010 09:36:35 +1000
Hi all,
I'm seeing a funny behaviour in Postgresql 8.4.4. Namely, a query can
be executed using either of two different query plans
Yaroslav Tykhiy y...@barnet.com.au writes:
- Bitmap Heap Scan on dbmail_headervalue v
(cost=1409.82..221813.70 rows=2805 width=16) (actual
time=28543.411..28623.623 rows=1 loops=1)
Recheck Cond: (v.headername_id = n.id)
Hi Tom,
On 14/09/2010, at 12:41 AM, Tom Lane wrote:
Yaroslav Tykhiy y...@barnet.com.au writes:
- Bitmap Heap Scan on dbmail_headervalue v
(cost=1409.82..221813.70 rows=2805 width=16) (actual
time=28543.411..28623.623 rows=1 loops=1)
Recheck
Hi all,
I'm seeing a funny behaviour in Postgresql 8.4.4. Namely, a query can
be executed using either of two different query plans, one taking a
few milliseconds and the other, tens of seconds. The work_mem setting
doesn't seem to affect it -- tried to increase or decrease it by 2 or
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From: y...@barnet.com.au
To: pgsql-general@postgresql.org
Subject: [GENERAL] Query plan choice issue
Date: Mon, 13 Sep 2010 09:36:35 +1000
