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Status Not under consideration
Workspace z/OS
Categories Communications Server
Created by Guest
Created on Apr 20, 2021

RELATED IDEAS

TCPIP Sysplex Autonomics with CSM constrain

VTAM CSM FIXED Storage arise 80% CONSTRAIN situation due to a high demand of TCP workload with 4 OSA 10 Gb interfaces.
But returns to a level under 80% immediately. This situation repeats more than 1000 times in 2 hours.
TCPIP Sysplex Autonomics doesn't detect the situation, and finally OSAs interfaces hangs several times.

We think than Sysplex Automics should act in this case and force the affected TCPIP stack from Sysplex functions.

Idea priority Medium
  • Guest
    Reply
    |     May 29, 2023

    Really more than 2 years for this answer?


  • Guest
    Reply
    |     May 29, 2023
    The reason that Sysplex Autonomics did not react to the fact that CSM fixed storage exceeded the 80% threshold is because Sysplex Autonomics will only react if a condition persists for the entire timer interval that is specified on the GLOBALCONFIG SYSPLEXMONITOR statement (defaults to 60 seconds). In your scenario, the system kept going below and above the 80% threshold very frequently, so Sysplex Autonomics could never wait long enough to determine if a persistent condition existed. The correct solution in this case is to increase the amount of fixed storage that can be configured to CSM, via the IVTCSM00 parmlib member, to prevent this back and forth over the 80% threshold.

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