wal_consistency_checking

doc html

<p>
        This parameter is intended to be used to check for bugs in the WAL
        redo routines.  When enabled, full-page images of any buffers modified
        in conjunction with the WAL record are added to the record.
        If the record is subsequently replayed, the system will first apply
        each record and then test whether the buffers modified by the record
        match the stored images.  In certain cases (such as hint bits), minor
        variations are acceptable, and will be ignored.  Any unexpected
        differences will result in a fatal error, terminating recovery.
       </p><p>
        The default value of this setting is the empty string, which disables
        the feature.  It can be set to <code class="literal">all</code> to check all
        records, or to a comma-separated list of resource managers to check
        only records originating from those resource managers.  Currently,
        the supported resource managers are <code class="literal">heap</code>,
        <code class="literal">heap2</code>, <code class="literal">btree</code>, <code class="literal">hash</code>,
        <code class="literal">gin</code>, <code class="literal">gist</code>, <code class="literal">sequence</code>,
        <code class="literal">spgist</code>, <code class="literal">brin</code>, and <code class="literal">generic</code>.
        Extensions may define additional resource managers. Only superusers and users with
        the appropriate <code class="literal">SET</code> privilege can change this setting.
       </p>

documentation revision

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