.-MAXSLOW--=--(0,180)-------------------------. >>-+---------------------------------------------+------------->< | .-0------. .-180----. | '-MAXSLOW--=--(--+--------+--,--+--------+--)-' '-value1-' '-value2-'
| statements: | PORT |
| dependencies: | CUADDR |
| range: | 0 or 10–255 |
- MAXSLOW=value1
- Specifies the number of seconds that VTAM® will allow a specific downstream PU to
be in slowdown mode. When the PU is in slowdown mode, VTAM monitors when inbound data arrives from
the PU, or when data is scheduled to be sent to the PU. If the PU
is in slowdown longer than the MAXSLOW value1, the link station (PU)
will be INOPed and the connection is cleaned up. If no data is being
sent or received over this connection, the PU will not be INOPed for
exceeding the MAXSLOW value1. This function requires the flow of inbound
or outbound data to initiate the slowdown checks. If the PU is in
slowdown and no data is being sent or received, the PU will remain
hung. However, no data will be accumulating on this PU.
The allowed values are 0 or 10–255 seconds. When the value defaults to 0 or is coded as 0, the function is disabled.
Result: When an XCA controller initiates slowdown for a specific PU (Flow Off), only this specific PU and its associated sessions are affected.
Tip: When multiple XCA major nodes define and share the same XCA subchannel (CUADDR), the MAXSLOW value1 of the first XCA major node to allocate the XCA subchannel will be used.
- MAXSLOW=(,value2)
- Specifies a threshold value, in seconds, that an XCA subchannel
has been in slowdown. When inbound or outbound data for an XCA port
is being processed and the subchannel has been in slowdown longer
than this threshold, message IST1886I will be issued for this condition.
The allowed values are 0 or 10–255 seconds. When the value is
coded as 0, the function is disabled. The default is 180 seconds.
Result: When an XCA controller initiates slowdown at the subchannel level, all downstream PUs and their associated sessions are affected by the slowdown mode.
Tip: When multiple XCA major nodes define and share the same XCA subchannel (CUADDR), the MAXSLOW value2 of the first XCA major node to allocate the XCA subchannel will be used.