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Status Delivered
Workspace IBM i
Categories Db2 for i
Created by Guest
Created on Apr 21, 2020

RELATED IDEAS

Provide API to retrieve journal cache wait interval

For IBM i servers with journal caching available there is no method / API available that allows the current cachewait value to be retrieved / reported.

It would be useful, see Use Case below, to have this functionality via an API; even if the value is a system wide value and not configurable for each journal.


Use Case:

Part of our software relies on journals / journal receivers and retrieving information on them. A recent customer issue has highlighted the need to record information regarding the state of the journal cache; for now simply is it active or not and if it is active what this the current cache wait time.

I can get the "active" information via the QjoRetrieveJournalInformation API but I cannot see anywhere in this API, or any other API, that would return the cache wait interval.

According to the IBM Journal SME this can only be viewed when running the CHGJRNA command. This command has no means of routing the output to a spooled file etc. for parsing to see the value and specifying *SAME does not report what the current value is in the joblog.


Idea priority High
  • Guest
    Reply
    |     Nov 13, 2020

    The QSYS2.SYSTEM_STATUS_INFO view was enhanced to return the JOURNAL_CACHE_WAIT_TIME column in fall 2020 with IBM i 7.4 PTF Group level 10 and IBM i 7.3 PTF Group level 22.

  • Guest
    Reply
    |     Jul 15, 2020

    BM will use this request as input to planning but no commitment is made or implied. This request will be updated in the future if IBM implements it. IBM will use votes and comments from others in the community to help prioritize this request.

  • Guest
    Reply
    |     Jun 15, 2020

    I wonder if the MATJPAT function has enough information for this - there are flags for whether it is caching, whether it is synchronous or asynchronous, a timeout for synchronous stuff, etc..

    There has to be something that the journal cache facility uses, everything is known or recorded somewhere on the system, there is usually some function that has the info, it just needs to be surfaced if it is not the MATJPAT function.

    Vern Hamberg, CAAC member

  • Guest
    Reply
    |     Apr 22, 2020

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Db2 for i
    Operating system - IBM i
    Source - None

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Availability, Recovery
    Operating system - IBM i
    Source - None

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