| From: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
|---|---|
| To: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: select_parallel test failure: gather sometimes losing tuples (maybe during rescans)? |
| Date: | 2018-03-05 21:32:12 |
| Message-ID: | e158757b-49d2-f682-bf55-b7085b3212a3@2ndquadrant.com |
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| Thread: | |
| Lists: | pgsql-hackers |
On 03/05/2018 09:37 PM, Thomas Munro wrote:
> On Tue, Mar 6, 2018 at 9:17 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> The optimistic approach seems a little bit less likely to slow this
>> down on systems where barriers are expensive, so I committed that one.
>> Thanks for debugging this; I hope this fixes it, but I guess we'll
>> see.
>
> Thanks.
>
> For the record, the commit message (written by me) should have
> acknowledged Tomas's help as reviewer and tester. Sorry about that.
>
Meh. You've done the hard work of figuring out what's wrong. The commit
message is perfectly fine.
regards
--
Tomas Vondra http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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