Horton

Re: Excessive PostmasterIsAlive calls slow down WAL redo

Thomas Munro <thomas.munro@enterprisedb.com>

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From: Thomas Munro <thomas.munro@enterprisedb.com>
To: Andres Freund <andres@anarazel.de>
Cc: Heikki Linnakangas <hlinnaka@iki.fi>, Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2018-04-21T00:25:27Z
Lists: pgsql-hackers

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Here's a new version, because FreeBSD's new interface changed slightly.

-- 
Thomas Munro
http://www.enterprisedb.com

Commits

  1. Poll postmaster less frequently in recovery.

  2. Use signals for postmaster death on FreeBSD.

  3. Use signals for postmaster death on Linux.

  4. Introduce a pipe between postmaster and each backend, which can be used to