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Re: increasing the default WAL segment size

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>, Beena Emerson <memissemerson@gmail.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2017-02-16T05:33:46Z
Lists: pgsql-hackers 
Andres Freund <andres@anarazel.de> writes:
> On 2017-02-15 22:46:38 -0300, Alvaro Herrera wrote:
>> Now that we've renamed "xlog" to "wal" in user-facing elements, I think
>> we should strive to use the name "wal" internally too in new code, not
>> "xlog" anymore.  This patch introduces several variables, macros,
>> functions that ought to change names now -- XLogSegmentOffset should be
>> WALSegmentOffset for example.  (I expect that as we touch code over
>> time, the use of "xlog" will decrease, though not fully disappear).

> I think this will just decrease the consistency in xlog.c (note the
> name) et al.

It's also going to make back-patching bug fixes in the area a real
nightmare.  Let's not change the code more than necessary to implement
the desired user-facing behavior.

			regards, tom lane

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.