A fix is available
APAR status
Closed as program error.
Error description
Service team finds that, after changes implemented via OA53037 UA94775 MQ may return misleading information regarding its use of above the bar storage. OA53037 introduced changes where XES will allocate the same amount of storage for serialized list and lock structures however, it is now taken from 64 bit storage instead of via dataspaces (4G per serialized list structure connector and 36G per lock structure connector) MQ does not exclude 64 bit storage allocated with MEMLIMIT=NO. Although it is not necessary to change the MQ MEMLIMIT value in conjunction with this change introduced by XES (OA53037), it is the case that CSQY220I can return the additional storage amounts allocated by XES module IXLD1INT. This can have the knock on effect that CSQY224I / CSQY226I indicate a storage shortage/ contraction condition when in fact such is not the case. . This may appear to be a storage leak, but it is not. * Additional keywords: QSG Queue Sharing Group
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: MQ may return misleading information * * regarding its use of above the bar * * storage in the message CSQY220I. * **************************************************************** MQ may return misleading information regarding its use of above the bar storage. The amount of above bar storage that MQ reports that it is using could be inflated to the point where messages CSQY224I and CSQY225E can be issued even when this calculation is incorrect.
Problem conclusion
The formula used to calculate the amount of above bar storage being used by MQ has been corrected so that it now shows the true figure.
Temporary fix
Comments
APAR Information
APAR number
PH06787
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-12-24
Closed date
2019-01-11
Last modified date
2019-02-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI60621
Modules/Macros
CSQSCTL
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
R100 PSY UI60621
UP19/01/26 P F901 ¢
Fix is available
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Document Information
Modified date:
02 February 2019