From: MirrorX <mirrorx@gmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: cannot use multicolumn index
Date: Wed, 14 Sep 2011 08:14:00 -0700 (PDT)
Message-ID: <1316013240443-4803198.post@n5.nabble.com> (raw)
In-Reply-To: <0ac4fa43876e63ec84515656f233960f.squirrel@sq.gransy.com>
References: <1316004607207-4802634.post@n5.nabble.com>
<1316005753084-4802699.post@n5.nabble.com>
<0ac4fa43876e63ec84515656f233960f.squirrel@sq.gransy.com>
thx for the answer.
- What is the problem, i.e. what behaviour you expect?
- How much data is the table?
- What portion of it matches the conditions?
- What is the index definition?
i think in my first post i provided most of these details but ->
1) what i expect is to be able to understand why the index is not used and
if possibly to use it somehow, or recreate it in a better way
2) the table has 115 GB and about 700 milion rows
3) the result should be less than 10 millions rows
4) the index is a btree
i tried to disable seq_scan and the query plan was changed and used another
index and not the one i wanted.
--
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To: pgsql-performance@postgresql.org
Cc: mirrorx@gmail.com
Subject: Re: cannot use multicolumn index
In-Reply-To: <1316013240443-4803198.post@n5.nabble.com>
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