From: | Chetan Suttraway <chetan(dot)suttraway(at)enterprisedb(dot)com> |
---|---|
To: | hyelluas <helen_yelluas(at)mcafee(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Concurrent read from a partition table. |
Date: | 2011-07-12 08:18:28 |
Message-ID: | CAPtHcnGOqAaLENQ_U+FwQ-2gEaQvNnNcJTzHhjqXHkX4wuSYww@mail.gmail.com |
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Lists: | pgsql-general |
On Tue, Jul 12, 2011 at 6:01 AM, hyelluas <helen_yelluas(at)mcafee(dot)com> wrote:
> Hello,
>
> I’m having a problem with concurrent processing.
> 2 queries are accessing the same parent table that have 24 partitions.
> I see “shared lock is not granted “ for one of them on one of the children
> while the other query is running.
>
> Does the “ select from a parent table” make a lock on the children?
>
>
In general if there are no predicates in query, then select would be fired
across all
children.
> How I can change it?
> The one of the queries runs hourly ( 8 min) on the server , the other one
> can be run by a user , and a few users can run the same query.
>
> Thank you.
> Helen
>
Could you post a self-contained test case?
Regards,
Chetan
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