Horton
Menu

Re: increasing the default WAL segment size

Robert Haas <robertmhaas@gmail.com>

View thread
From: Robert Haas <robertmhaas@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: Michael Paquier <michael.paquier@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, Simon Riggs <simon@2ndquadrant.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2016-08-28T14:07:47Z
Lists: pgsql-hackers 
On Fri, Aug 26, 2016 at 12:39 AM, Andres Freund <andres@anarazel.de> wrote:
> Maybe I'm missing something here - but why would we need to do any of
> that? The WAL already isn't compatible between versions, and we don't
> reuse the old server's WAL anyway? Isn't all that's needed relaxing some
> error check?

Yeah.  If this change is made in a new major version - and how else
would we do it? - it doesn't introduce any incompatibility that
wouldn't be present already.  pg_upgrade doesn't (and can't) migrate
WAL.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

Commits

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

  1. Make WAL segment size configurable at initdb time.

  2. Perform only one ReadControlFile() during startup.

  3. Introduce BYTES unit for GUCs.

  4. Remove useless duplicate inclusions of system header files.

  5. Refactor other replication commands to use DestRemoteSimple.

  6. Add a SHOW command to the replication command language.

  7. Add a new DestReceiver for printing tuples without catalog access.

  8. Support fls().

  9. Extend yesterday's patch making BLCKSZ and RELSEG_SIZE configurable to also

  10. Commit the reasonably uncontroversial parts of J.R. Nield's PITR patch, to

  11. XLOG (also known as WAL -:)) Bootstrap/Startup/Shutdown.

  12. Transaction log manager core code.