@@ -684,8 +684,9 @@ include 'filename'
684684 </indexterm>
685685 <listitem>
686686 <para>
687- Specifies the number of seconds before sending a keepalive packet on
688- an otherwise idle connection. A value of 0 uses the system default.
687+ Specifies the number of seconds of inactivity after which TCP
688+ should send a keepalive message to the client. A value of 0 uses
689+ the system default.
689690 This parameter is supported only on systems that support the
690691 <symbol>TCP_KEEPIDLE</> or <symbol>TCP_KEEPALIVE</> symbols, and on
691692 Windows; on other systems, it must be zero.
@@ -708,8 +709,9 @@ include 'filename'
708709 </indexterm>
709710 <listitem>
710711 <para>
711- Specifies the number of seconds between sending keepalives on an
712- otherwise idle connection. A value of 0 uses the system default.
712+ Specifies the number of seconds after which a TCP keepalive message
713+ that is not acknowledged by the client should be retransmitted.
714+ A value of 0 uses the system default.
713715 This parameter is supported only on systems that support the
714716 <symbol>TCP_KEEPINTVL</> symbol, and on Windows; on other systems, it
715717 must be zero.
@@ -732,8 +734,9 @@ include 'filename'
732734 </indexterm>
733735 <listitem>
734736 <para>
735- Specifies the number of keepalive packets to send on an otherwise idle
736- connection. A value of 0 uses the system default. This parameter is
737+ Specifies the number of TCP keepalives that can be lost before
738+ the server's connection to the client is considered dead. A value of 0
739+ uses the system default. This parameter is
737740 supported only on systems that support the <symbol>TCP_KEEPCNT</>
738741 symbol; on other systems, it must be zero.
739742 In sessions connected via a Unix-domain socket, this parameter is