Re: [Patch] ALTER SYSTEM READ ONLY

Amul Sul <sulamul@gmail.com>

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From: Amul Sul <sulamul@gmail.com>

To: Robert Haas <robertmhaas@gmail.com>

Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>

Date: 2022-04-08T14:27:03Z

Lists: pgsql-hackers

Attachments

v45-0005-Documentation.patch (application/octet-stream) patch v45-0005
v45-0006-Test-Few-tap-tests-for-wal-prohibited-system.patch (application/octet-stream) patch v45-0006
v45-0002-Remove-dependencies-on-startup-process-specifica.patch (application/octet-stream) patch v45-0002
v45-0003-Implement-wal-prohibit-state-using-global-barrie.patch (application/octet-stream) patch v45-0003
v45-0004-Error-or-Assert-before-START_CRIT_SECTION-for-WA.patch (application/octet-stream) patch v45-0004
v45-0001-Create-XLogAcceptWrites-function-with-code-from-.patch (application/octet-stream) patch v45-0001

Attached is rebase version for the latest maste head(#891624f0ec).

0001 and 0002 patch is changed a bit due to xlog.c refactoring
commit(#70e81861), needing a bit more thought to copy global variables into
right shared memory structure.  Also, I made some changes to the 0003
patch to avoid
XLogAcceptWrites() entrancing suggested in offline discussion.

Regards,
Amul

Commits

Initialize variable to placate compiler.
- a030a0c5ccb1 15.0 landed
StartupXLOG: Don't repeatedly disable/enable local xlog insertion.
- 18e0913a4203 15.0 landed
StartupXLOG: Call CleanupAfterArchiveRecovery after XLogReportParameters.
- a75dbf7f9ee6 15.0 landed
Postpone some end-of-recovery operations related to allowing WAL.
- 811051c2e7af 15.0 landed
Refactor some end-of-recovery code out of StartupXLOG().
- 6df1543abfed 15.0 landed
Re-enable contrib/bloom's TAP tests.
- 7d1aa6bf1c27 15.0 cited
Remove unnecessary call to ReadCheckpointRecord().
- 1d919de5eb3f 15.0 cited
Allow for error or refusal while absorbing a ProcSignalBarrier.
- a3ed4d1efe9f 14.0 landed
Add comment to explain an unused function parameter
- 101f903e51f5 14.0 cited
Extend the ProcSignal mechanism to support barriers.
- 16a4e4aecd47 13.0 cited
At promotion, don't leave behind a partial segment on the old timeline.
- 7cbee7c0a1db 9.5.0 cited