Horton

Re: Minimal logical decoding on standbys

Ibrar Ahmed <ibrar.ahmad@gmail.com>

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From: Ibrar Ahmed <ibrar.ahmad@gmail.com>
To: "Drouvot, Bertrand" <bdrouvot@amazon.com>
Cc: Andres Freund <andres@anarazel.de>, Robert Haas <robertmhaas@gmail.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, Amit Khandekar <amitdkhan.pg@gmail.com>, fabriziomello@gmail.com, tushar <tushar.ahuja@enterprisedb.com>, Rahila Syed <rahila.syed@2ndquadrant.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2022-07-04T13:17:26Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Reduce the log level in 035_standby_logical_decoding.pl.

  2. 035_standby_logical_decoding: Add missing waits for replication

  3. For cascading replication, wake physical and logical walsenders separately

  4. Handle logical slot conflicts on standby

  5. Support invalidating replication slots due to horizon and wal_level

  6. Prevent use of invalidated logical slot in CreateDecodingContext()

  7. Replace replication slot's invalidated_at LSN with an enum

  8. Pass down table relation into more index relation functions

  9. Assert only valid flag bits are passed to visibilitymap_set()

  10. Remove unused _bt_delitems_delete() argument.

  11. Add xl_btree_delete optimization.

On Mon, Jul 4, 2022 at 6:12 PM Drouvot, Bertrand <bdrouvot@amazon.com>
wrote:

> Hi,
> On 7/1/22 10:03 PM, Ibrar Ahmed wrote:
>
>
> On Thu, Jun 30, 2022 at 1:49 PM Drouvot, Bertrand <bdrouvot@amazon.com>
> wrote:
>
>> I'm going to re-create a CF entry for it, as:
>>
>> - It seems there is a clear interest for the feature (given the time
>> already spend on it and the number of people that worked on)
>>
>> - I've in mind to resume working on it
>>
>> I have already done some research on that, I can definitely look at it.
>
> Thanks!
>
> This feature proposal is currently made of 5 sub-patches:
>
> 0001: Add info in WAL records in preparation for logical slot conflict
> handling
> 0002: Handle logical slot conflicts on standby
> 0003: Allow logical decoding on standby.
> 0004: New TAP test for logical decoding on standby
> 0005: Doc changes describing details about logical decoding
>
> I suggest that we focus on one sub-patch at a time.
>
> I'll start with 0001 and come back with a rebase addressing Andres and
> Robert's previous comments.
>
> Sounds good to you?
>
> Thanks
>
> --
> Bertrand Drouvot
> Amazon Web Services: https://aws.amazon.com
>
> That's great I am looking at "0002: Handle logical slot conflicts on
standby".


-- 
Ibrar Ahmed