Horton

Re: Refactoring the checkpointer's fsync request queue

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>
To: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Shawn Debnath <sdn@amazon.com>, Andres Freund <andres@anarazel.de>, Robert Haas <robertmhaas@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Dmitry Dolgov <9erthalion6@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2019-04-04T21:58:33Z
Lists: pgsql-hackers 
On Fri, Apr 5, 2019 at 10:53 AM Thomas Munro <thomas.munro@gmail.com> wrote:
> Ok, here is a patch that adds a one-typedef header and uses
> SegmentIndex to replace all cases of BlockNumber and int holding a
> segment number (where as an "index" or a "count").

(sorry, I meant "SegmentNumber", not "SegmentIndex")

-- 
Thomas Munro
https://enterprisedb.com

Commits

  1. Fix bugs in mdsyncfiletag().

  2. Refactor the fsync queue for wider use.

  3. Don't forget about failed fsync() requests.

  4. PANIC on fsync() failure.

  5. Move LockClauseStrength, LockWaitPolicy into new file nodes/lockoptions.h.

  6. Add new file for checkpointer.c

  7. Split work of bgwriter between 2 processes: bgwriter and checkpointer.

  8. Install infrastructure for shared-memory free space map. Doesn't actually