Horton

Re: WAL consistency check facility

Peter Eisentraut <peter.eisentraut@2ndquadrant.com>

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From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Michael Paquier <michael.paquier@gmail.com>, Kuntal Ghosh <kuntalghosh.2007@gmail.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, Peter Geoghegan <pg@heroku.com>, Simon Riggs <simon@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>, Amit Kapila <amit.kapila@enterprisedb.com>, Andres Freund <andres@anarazel.de>
Date: 2016-11-13T03:06:39Z
Lists: pgsql-hackers 
On 11/9/16 11:55 PM, Michael Paquier wrote:
> +     <varlistentry id="guc-wal-consistency" xreflabel="wal_consistency">
> +      <term><varname>wal_consistency</varname> (<type>string</type>)
> +      <indexterm>
> +       <primary><varname>wal_consistency</> configuration parameter</primary>
> +      </indexterm>
> +      </term>
> +      <listitem>
> +       <para>
> +        This parameter is used to check the consistency of WAL records, i.e,
> +        whether the WAL records are inserted and applied correctly. When
> +        <varname>wal_consistency</varname> is enabled for a WAL record, it
> +        stores a full-page image along with the record. When a full-page image
> +        arrives during redo, it compares against the current page to check whether
> +        both are consistent.
> +       </para>

Could we name this something like wal_consistency_checking?

Otherwise it sounds like you use this to select the amount of
consistency in the WAL (similar to, say, wal_level).

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Minor fixes for WAL consistency checking.