The KeepAlive Interval attribute is used to specify a time-out value for a channel.
The KeepAlive Interval attribute is a value passed to the communications stack specifying the KeepAlive timing for the channel. It allows you to specify a different keepalive value for each channel.
For this attribute to have any effect, TCP/IP keepalive must be enabled. On z/OS, you do this by issuing the ALTER QMGR TCPKEEP(YES) MQSC command. On other platforms, it occurs when the KEEPALIVE=YES parameter is specified in the TCP stanza in the distributed queuing configuration file, qm.ini, or through the WebSphere MQ Explorer. Keepalive must also be switched on within TCP/IP itself, using the TCP profile configuration data set.
The value indicates a time, in seconds, and must be in the range 0 to 99999. A KeepAlive Interval value of 0 indicates that channel KeepAlive is not enabled for the channel. However, when KeepAlive Interval is set to 0, KeepAlive still occurs if TCP/IP KeepAlive has been enabled, as described above. You can also set KAINT to a value of AUTO (this is the default). If KAINT is set to AUTO, the KeepAlive value is based on the value of the negotiated heartbeat interval (HBINT) as follows:
Negotiated HBINT | KAINT |
---|---|
>0 | Negotiated HBINT + 60 seconds |
0 | 0 |
This attribute is valid for all channel types.
The value is ignored for all channels that have a TransportType (TRPTYPE) other than TCP or SPX
You can set the KeepAlive Interval (KAINT) attribute for channels on a per-channel basis. On platforms other than z/OS, you can access and modify the parameter, but it is only stored and forwarded; there is no functional implementation of the parameter. If you need the functionality provided by the KAINT parameter, use the Heartbeat Interval (HBINT) parameter, as described in Heartbeat interval (HBINT).
Notices |
Downloads |
Library |
Support |
Feedback
![]() ![]() |
kaint |