Re: [HACKERS] Logical Replication WIP

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От Petr Jelinek
Тема Re: [HACKERS] Logical Replication WIP
Дата
Msg-id a98b5b1c-99e8-3b95-cabe-7c9f343922a6@2ndquadrant.com
обсуждение исходный текст
Ответ на Re: [HACKERS] Logical Replication WIP  (Erik Rijkers <er@xs4all.nl>)
Ответы Re: [HACKERS] Logical Replication WIP  (Erik Rijkers <er@xs4all.nl>)
Список pgsql-hackers
On 20/12/16 08:10, Erik Rijkers wrote:
> On 2016-12-19 08:04, Erik Rijkers wrote:
>> On 2016-12-18 11:12, Petr Jelinek wrote:
>>
>> (now using latest: patchset:)
>>
>> 0001-Add-PUBLICATION-catalogs-and-DDL-v14.patch
>> 0002-Add-SUBSCRIPTION-catalog-and-DDL-v14.patch
>> 0003-Define-logical-replication-protocol-and-output-plugi-v14.patch
>> 0004-Add-logical-replication-workers-v14.patch
>> 0005-Add-separate-synchronous-commit-control-for-logical--v14.patch
>>
>> Sometimes  replication (caused by a pgbench run)  runs for a few
>> seconds replicating all 4 pgbench tables correctly, but never longer
>> than 10 to 20 seconds.
>>
> 
> I've concocted pgbench_derail.sh.  It assumes 2 instances running,
> initially without the publication and subsciption.
> 
> There are two separate installations, on the same machine.
> 

Thanks, this was very useful. We had wrong attribute index arithmetics
in the place where we verify that replica identities match well enough.

BTW that script you have for testing has 2 minor flaws in terms of
pgbench_history - the order by is not unique enough (adding mtime or
something helps) and second, the pgbench actually truncates the
pgbench_history unless -n is added to command line.

So attached is v15, which fixes this and the
ERROR:  unexpected command tag "PUBLICATION
as reported by Steve Singer (plus tab completion fixes and doc fixes).

-- 
  Petr Jelinek                  http://www.2ndQuadrant.com/
  PostgreSQL Development, 24x7 Support, Training & Services

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