LivenessTimeout connection parameter [LTO]

To control the termination of connections when they are no longer intact.

Network server on TCP/IP communications protocols.

All platforms except non-threaded UNIX applications.

Integer (in seconds)

120

If no LivenessTimeout value is set, the liveness timeout is controlled by the setting on the server, which defaults to 120 seconds.

A liveness packet is sent periodically across a client/server TCP/IP communications protocol to confirm that a connection is intact. If the client runs for the liveness timeout period without detecting a liveness request or response packet, the communication is severed.

Liveness packets are sent when a connection has not sent any packets for between one third and two thirds of the LivenessTimeout value.

When the communication is severed, the client machine forgets the address of the server. It looks the address up next time there is a connection to the server from that machine, dropping all current connections to that server.

When there are more than 200 connections to a server, the server automatically calculates a higher LivenessTimeout value based on the stated LivenessTimeout value. This enables the server to handle a large number of connections more efficiently.

Alternatively, you can set this parameter by entering its value in the LivenessTimeout text box of the Network tab of the ODBC Configuration dialog.

The following sets a Liveness timeout value of 60 seconds:

LTO=60