log_transaction_sample_rate

doc html

<p>
         Sets the fraction of transactions whose statements are all logged,
         in addition to statements logged for other reasons.  It applies to
         each new transaction regardless of its statements' durations.
         Sampling is stochastic, for example <code class="literal">0.1</code> means
         there is statistically one chance in ten that any given transaction
         will be logged.
         <code class="varname">log_transaction_sample_rate</code> can be helpful to
         construct a sample of transactions.
         The default is <code class="literal">0</code>, meaning not to log
         statements from any additional transactions.  Setting this
         to <code class="literal">1</code> logs all statements of all transactions.
         Only superusers and users with the appropriate <code class="literal">SET</code>
         privilege can change this setting.
        </p><div class="note"><h3 class="title">Note</h3><p>
         Like all statement-logging options, this option can add significant
         overhead.
        </p></div>

documentation revision

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