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IBM Data and AI Ideas Portal for Customers


This portal is to open public enhancement requests against products and services offered by the IBM Data & AI organization. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (https://ideas.ibm.com).


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Status Delivered
Workspace Db2
Components pureScale
Created by Guest
Created on May 29, 2019

Db2 pureScale - Enforce of different db2diag path to mitigate the pdlog lock stuck issue

We use Db2 pureScale in many environments using POWER System. In a specific situation of resources adjustment (CPU and RAM) in a Cache Facility (CF) we experience an unplaned outage. This happened after adjust the resources and perform the CF reboot. When it was executed all the cluster crashes. We open a case to investigate this abnormal cluster's behavior: TS002160428. The Db2 Lab found the RCA: "pdlog getting stuck on a latch and CF departure could not be processed". And folow the shares a best practice (BP) about how to avoid that behavior again in the future: "change to the DIAGPATH setting it by member should mitigate the issue". Next, we are open this RFE to set the BP as default setting and do not permit future changes (do not permit merge the diag) in case of Db2 pureScale cluster architecture.
 

Needed by Date Dec 31, 2019