From: | Jenish <jenishvyas(at)gmail(dot)com> |
---|---|
To: | pgsql-admin(at)postgresql(dot)org |
Subject: | Strange behavior of child table. |
Date: | 2011-06-01 06:07:29 |
Message-ID: | BANLkTikmOw=wmWe2XkzoaFkRxxSO0hu2Lg@mail.gmail.com |
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Lists: | pgsql-admin |
Hi All,
I have created partition on table Round_Action , which has 3 inherited
partition tables.
When I am firing a simple select query with limit on parent table it is
taking huge time to execute. But when I am firing this query directly on
inherited table it is taking few milliseconds.
EXP.
select * from Round_Action where action_id =50000 limit 100 → execution time
80 sec
select * from Round_Action_CH1 action_id =50000 limit 100 → execution time
0.1 sec
Round_Action is the parent table and has no record in the tables, all the
records are lying in child tables.
Table is having index on action_id.
Partition is trigger based.
Postgres Version : (PostgreSQL) 8.4.6
Why there is difference in execution time? What I am doing wrong?
--
Thanks & regards,
JENISH VYAS
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