log_autovacuum_min_duration

doc html

<p>
        Causes each action executed by autovacuum to be logged if it ran for at
        least the specified amount of time.  Setting this to zero logs
        all autovacuum actions. <code class="literal">-1</code> disables logging autovacuum
        actions. If this value is specified without units, it is taken as milliseconds.
        For example, if you set this to
        <code class="literal">250ms</code> then all automatic vacuums and analyzes that run
        250ms or longer will be logged.  In addition, when this parameter is
        set to any value other than <code class="literal">-1</code>, a message will be
        logged if an autovacuum action is skipped due to a conflicting lock or a
        concurrently dropped relation. The default is <code class="literal">10min</code>.
        Enabling this parameter can be helpful in tracking autovacuum activity.
        This parameter can only be set in the <code class="filename">postgresql.conf</code>
        file or on the server command line; but the setting can be overridden for
        individual tables by changing table storage parameters.
       </p>

documentation revision

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