The subchannel threshold identified by the second subparameter of MAXSLOW on the PORT definition statement on an XCA subchannel has been exceeded. This means that the XCA device passed control information to VTAM® indicating that the device will not accept data. Sessions using this device will probably experience performance degradation.
time is the subchannel threshold value in seconds.
device is the subchannel (CUA) that is in slowdown.
Processing continues.
Storage usage might rise if a large amount of data is queued to be sent to the device that is in slowdown. Issue storage use display commands to determine whether storage usage is high. DISPLAY NET,BFRUSE can be used to display VTAM storage usage and DISPLAY NET,CSM can be used to display CSM storage usage. If storage usage is high and the slowdown condition persists, the operator can VARY INACT this XCA device. DISPLAY NET,MAJNODES can be used to determine which XCA nodes are active. Message IST1021I in the displays of those XCA major nodes will show which are using this subchannel. Any diagnostic aids available for the XCA device itself should be invoked to determine why it is reporting a slowown condition to VTAM.
Use any diagnotics available for that device to determine why the XCA device is in slowdown.
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