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Status Delivered
Workspace CICS Transaction Server for z/OS
Categories Runtime
Created by Guest
Created on Nov 4, 2015

RELATED IDEAS

CICS IPIC Heartbeat timeout adjustable

CICS TS 5.2 introduced IPIC heartbeats. Every 60s CICS starts a CIS1 task for every IPCONN active in the system.
The idea is to check that the partner region is reachable. The timeout
value for the check is 2 x 10 seconds and is not adjustable.

If the CIS1 task times out it purges all tasks havin an UOW link on the connection and then releases or discards the connection if it has been autoinstalled.

This beahaviour leads to a lot of stress especially in webowning regions or TOR's that connect to many AOR's.

In some of our LPARS CPU constraints during low activity in the CICS regions lead to dumps and un-responsiveness in the WOR / TOR regions.

Idea priority Urgent
  • Guest
    Reply
    |     Jun 16, 2017

    This RFE is satisfied by CICS TS 5.4 which is generally available from today June 16th 2017.
    For more information see the announcement letter https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?infotype=an&subtype=ca&supplier=897&letternum=ENUS217-113

    The CICS IPIC heartbeat function is changed such that IPIC heartbeat messages are sent out only if the connected CICS region is executing in a different sysplex.

  • Guest
    Reply
    |     May 16, 2017

    This RFE is satisfied by CICS TS 5.4 which was announced on May 16th 2017 with a planned general availability date of June 16th 2017.
    For more information see the announcement letter https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?infotype=an&subtype=ca&supplier=897&letternum=ENUS217-113

    The CICS IPIC heartbeat function is changed such that IPIC heartbeat messages are sent out only if the connected CICS region is executing in a different sysplex.

  • Guest
    Reply
    |     Dec 22, 2016

    We would love to see it retrofitted to CICS TS 5.2 as its a major concern about the availability of our Development CICS JAVA Liberty regions in an heavily GCP constrained environment.

    regards Prabhat

  • Guest
    Reply
    |     Apr 29, 2016

    This is something we would like to address. The RFE is being moved into 'Planned for Future release' status. Please note:
    IBM’s statements regarding its plans, directions, and intent are subject to change or withdrawal without notice at IBM’s sole discretion. Information regarding potential future products is intended to outline our general product direction and it should not be relied on in making a purchasing decision. The information mentioned regarding potential future products is not a commitment, promise, or legal obligation to deliver any material, code or functionality. Information about potential future products may not be incorporated into any contract. The development, release, and timing of any future features or functionality described for our products remains at our sole discretion.

  • Guest
    Reply
    |     Dec 1, 2015

    Rather than provide a parameter to adjust the heartbeat interval, we could consider a solution where CICS adapts the heartbeat interval depending on the state of the region. This is a candidate for a future release.

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