@@ -555,8 +555,9 @@ SET ENABLE_SEQSCAN TO OFF;
555555 an otherwise idle connection. A value of 0 uses the system default.
556556 This parameter is supported only on systems that support the
557557 <symbol>TCP_KEEPIDLE</> or <symbol>TCP_KEEPALIVE</> symbols, and on
558- Windows; on other systems, it must be zero. This parameter is ignored
559- for connections made via a Unix-domain socket.
558+ Windows; on other systems, it must be zero.
559+ In sessions connected via a Unix-domain socket, this parameter is
560+ ignored and always reads as zero.
560561 </para>
561562 <note>
562563 <para>
@@ -578,8 +579,9 @@ SET ENABLE_SEQSCAN TO OFF;
578579 otherwise idle connection. A value of 0 uses the system default.
579580 This parameter is supported only on systems that support the
580581 <symbol>TCP_KEEPINTVL</> symbol, and on Windows; on other systems, it
581- must be zero. This parameter is ignored for connections made via a
582- Unix-domain socket.
582+ must be zero.
583+ In sessions connected via a Unix-domain socket, this parameter is
584+ ignored and always reads as zero.
583585 </para>
584586 <note>
585587 <para>
@@ -600,8 +602,9 @@ SET ENABLE_SEQSCAN TO OFF;
600602 Specifies the number of keepalive packets to send on an otherwise idle
601603 connection. A value of 0 uses the system default. This parameter is
602604 supported only on systems that support the <symbol>TCP_KEEPCNT</>
603- symbol; on other systems, it must be zero. This parameter is ignored
604- for connections made via a Unix-domain socket.
605+ symbol; on other systems, it must be zero.
606+ In sessions connected via a Unix-domain socket, this parameter is
607+ ignored and always reads as zero.
605608 </para>
606609 <note>
607610 <para>