Horton

Re: Refactoring the checkpointer's fsync request queue

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Thomas Munro <thomas.munro@gmail.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: 2019-04-29T13:03:21Z
Lists: pgsql-hackers 
On 2019-Apr-05, Thomas Munro 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").

Hmm, I now see (while doing the pg_checksum translation) that this patch
didn't make it.  Pity ...

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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