RE: Slow catchup of 2PC (twophase) transactions on replica in LR - Mailing list pgsql-hackers

From Hayato Kuroda (Fujitsu)
Subject RE: Slow catchup of 2PC (twophase) transactions on replica in LR
Date
Msg-id OSBPR01MB25521E993657E754B0C51A98F5122@OSBPR01MB2552.jpnprd01.prod.outlook.com
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In response to RE: Slow catchup of 2PC (twophase) transactions on replica in LR  ("Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>)
Responses RE: Slow catchup of 2PC (twophase) transactions on replica in LR
RE: Slow catchup of 2PC (twophase) transactions on replica in LR
List pgsql-hackers
> Dear Vitaly,
> 
> > I looked at the patch and realized that I can't try it easily in the near future
> > because the solution I'm working on is based on PG16 or earlier. This patch is
> > not easily applicable to the older releases. I have to port my solution to the
> > master, which is not done yet.
> 
> We also tried to port our patch for PG16, but the largest barrier was that a
> replication command ALTER_SLOT is not supported. Since the slot option
> two_phase
> can't be modified, it is difficult to skip decoding PREPARE command even when
> altering the option from true to false.
> IIUC, Adding a new feature (e.g., replication command) for minor updates is
> generally
> prohibited
> 
> We must consider another approach for backpatching, but we do not have
> solutions
> for now.

Attached patch set is a ported version for PG16, which breaks ABI. This can be used
for testing purpose, but it won't be pushed to REL_16_STABLE.
At least, this patchset can pass my github CI.

Can you apply and check whether your issue is solved?

Best Regards,
Hayato Kuroda
FUJITSU LIMITED
https://www.fujitsu.com/ 
 

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