Horton

Re: Need Multixact Freezing Docs

Josh Berkus <josh@agliodbs.com>

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From: Josh Berkus <josh@agliodbs.com>
To: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org
Date: 2014-04-16T21:32:44Z
Lists: pgsql-hackers 
>> So if age() doesn't mean anything, then how are users to know when the
>> need to freeze?
> 
> I don't understand.  Autovacuum will freeze this automatically when the
> threshold is reached.  Users don't need to do anything.

What I'm asking is:

- how do users know if Autovacuum is keeping up with multixact feezing?
- how do users get data on multixact usage so that they can tune the
parameters?

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com

Commits

  1. Document pg_get_multixact_members().