Horton

Re: [Proposal] Fully WAL logged CREATE DATABASE - No Checkpoints

Dilip Kumar <dilipbalaut@gmail.com>

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From: Dilip Kumar <dilipbalaut@gmail.com>
To: Neha Sharma <neha.sharma@enterprisedb.com>
Cc: Ashutosh Sharma <ashu.coek88@gmail.com>, Greg Nancarrow <gregn4422@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Andres Freund <andres@anarazel.de>, Heikki Linnakangas <hlinnaka@iki.fi>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2021-12-09T14:04:36Z
Lists: pgsql-hackers 
On Thu, Dec 9, 2021 at 7:23 PM Neha Sharma <neha.sharma@enterprisedb.com> wrote:
>
> On Thu, Dec 9, 2021 at 11:12 AM Ashutosh Sharma <ashu.coek88@gmail.com> wrote:

> \c postgres
> alter database test1 set tablespace tab1;
>
> --Cancel the below command after few seconds
> alter database test1 set tablespace pg_default;
>
> \c test1
> alter table t set tablespace tab1;
>
>
> Logfile Snippet:
> 2021-12-09 17:49:18.110 +04 [18151] PANIC:  could not fsync file "base/116398/116400": No such file or directory
> 2021-12-09 17:49:19.105 +04 [18150] LOG:  checkpointer process (PID 18151) was terminated by signal 6: Aborted
> 2021-12-09 17:49:19.105 +04 [18150] LOG:  terminating any other active server processes

Yeah, it seems like the fsync requests produced while copying database
objects to the new tablespace are not unregistered.  This seems like a
different issue than previously raised.  I will work on this next
week, thanks for testing.

-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com

Commits

  1. When using the WAL-logged CREATE DATABASE strategy, bulk extend.

  2. Avoid using a fake relcache entry to own an SmgrRelation.

  3. Fix data-corruption hazard in WAL-logged CREATE DATABASE.

  4. initdb: When running CREATE DATABASE, use STRATEGY = WAL_COPY.

  5. Simplify a needlessly-complicated regular expression.

  6. In 020_createdb.pl, change order of command-line arguments.

  7. Add new block-by-block strategy for CREATE DATABASE.

  8. Fix replay of create database records on standby

  9. Refactor code for reading and writing relation map files.

  10. Replace RelationOpenSmgr() with RelationGetSmgr().

  11. Refactor the fsync queue for wider use.