<listitem>
<para>
If this option is given, HTTP requests are logged to file named
- <replaceable>recfile</replaceable>.
+ <replaceable>recfile</replaceable> and predictable sessions are enabled.
+ Using special argument, dash
+ (<literal>-</literal>), will make Pazpar2 use predictable sessions
+ only (no recording).
+ This is necessary when playing HTTP communication against pazpar2
+ with pazpar2_play.
</para>
</listitem>
</varlistentry>