From: Aramaki Zyake <zyake.mk4@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-docs@lists.postgresql.org <pgsql-docs@lists.postgresql.org>
Subject: RE: Required locks for ANALYZE
Date: Mon, 30 Sep 2019 16:46:56 +0900
Message-ID: <5d91b2f1.1c69fb81.bf75c.2036@mx.google.com> (raw)
In-Reply-To: <6129.1566310344@sss.pgh.pa.us>
References: <156628723253.1296.7377373462603881976@wrigleys.postgresql.org>
<6129.1566310344@sss.pgh.pa.us>
Hi,
I’m terribly sorry for the delay of response.
>This does not really seem like an improvement. The second formulation is
>pedantically correct, but also unintelligible.
>
> Maybe we could make it say "run in parallel with non-DDL activity" ?
I completely agree with you, therefore, I amended it as follows.
----
ANALYZE requires only a read lock on the target table, so it can run in
parallel with non-DDL activity on the table.
----
Would it be possible to proceed further?
Best regards
From: Tom Lane
Sent: Tuesday, August 20, 2019 11:12 PM
To: zyake.mk4@gmail.com
Cc: pgsql-docs@lists.postgresql.org
Subject: Re: Required locks for ANALYZE
PG Doc comments form <noreply@postgresql.org> writes:
> Therefore, in my opinion, the below paragraph should be amended as below.
> * Before
> -----
> ANALYZE requires only a read lock on the target table, so it can run in
> parallel with other activity on the table.
> -----
> * After
> -----
> ANALYZE requires only a SHARE UPDATE EXCLUSIVE lock on the target table, so
> it can run in parallel with queries requiring ACCESS SHARE/ROW SHARE/ROW
> EXCLUSIVE locks such as SELECT, UPDATE, DELETE, INSERT on the table.
> -----
This does not really seem like an improvement. The second formulation is
pedantically correct, but also unintelligible.
Maybe we could make it say "run in parallel with non-DDL activity" ?
regards, tom lane
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Subject: RE: Required locks for ANALYZE
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