Re: logical replication apply to run with sync commit off by default

On 07/03/17 06:23, Petr Jelinek wrote:
> Hi,
>
> there has been discussion at the logical replication initial copy thread
> [1] about making apply work with sync commit off by default for
> performance reasons and adding option to change that per subscription.
>
> Here I propose patch to implement this - it adds boolean column
> subssynccommit to pg_subscription catalog which decides if
> synchronous_commit should be off or local for apply. And it adds
> SYNCHRONOUS_COMMIT = boolean to the list of WITH options for CREATE and
> ALTER SUBSCRIPTION. When nothing is specified it will set it to false.
>
> The patch is built on top of copy patch currently as there are conflicts
> between the two and this helps a bit with testing of copy patch.
>
> [1]
> https://www.postgresql.org/message-id/CA+TgmoY7Lk2YKArcp4O=Qu=xOoR8j71MAd1OTEojAWmujE3k0w@mail.gmail.com
>

I rebased this patch against recent changes and the latest version of
copy patch.

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