| From: | Kevin Grittner <kgrittn(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Ants Aasma <ants(dot)aasma(at)eesti(dot)ee>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Kevin Grittner <kgrittn(at)postgresql(dot)org>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, "pgsql-committers(at)postgresql(dot)org" <pgsql-committers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] Re: pgsql: Avoid extra locks in GetSnapshotData if old_snapshot_threshold < |
| Date: | 2016-05-24 18:04:09 |
| Message-ID: | CACjxUsNfxxZG2ZsxBbcVqX+3j=KXE11n2p_tm5OaQ0q_KO1z4w@mail.gmail.com |
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On Tue, May 24, 2016 at 12:00 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> Analyze IIRC acquires a new snapshot when getting sample rows,
I could not find anything like that, and a case-insensitive search
of analyze.c finds no occurrences of "snap". Can you remember
where you think you saw something that would cause the ANALYZE
command in my test to use a snapshot other than the one from the
REPEATABLE READ transaction in which it was run?
--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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