MP01: MQSeries - Tuning Queue limits in Version 5 products
Downloadable files
Abstract
This SupportPac provides instructions for changing the queue limits in Version 5 products.
Download Description
MQSeries has many limits built into the system. These are designed to prevent out-of-control applications obtaining important system resources that prevent a balanced workload from operating properly. Customers have stated that two of these limits in particular (Maximum amount of bytes in a queue and Maximum amount of memory (RAM) reserved for non-persistent messages) are hampering normal operations. Therefore, a mechanism for changing these two limits has been introduced.
POSSIBLE USES
This SupportPac provides instructions for changing the limits associated with the maximum amount of bytes in a queue and the maximum amount of memory reserved for non-persistent messages. However, these limits should be altered only after careful consideration of the potential benefits; change only those queue definitions that require the additional function. This method of altering the limits is Version 5-specific, is not an MQSeries API, and hence is not guaranteed to be upward compatible in future releases of MQSeries.
SKILL LEVEL REQUIRED
Users of this SupportPac need to have expert knowledge of MQSeries on the platform they are tuning.
DETAILS
Category: 2
First Release: 17Dec97
Last release: 02Oct03
Current Version: 1.1
»Please note that the version number shown in the right-hand pane is the version of the MQ or WBI product that this SupportPac applies to. The date on the right is the last webpage refresh.
NEW IN THIS RELEASE
The following changes have been made in this release:
» Update for WebSphere MQ V5.3
Prerequisites
The SupportPac requires:
» MQSeries for Windows NT, HP-UX, AIX, OS/2 WARP or Sun Solaris - V5
Category 2 SupportPacs are provided in good faith and AS-IS. There is no warranty or further service implied or committed and any supplied sample code is not supported via IBM product service channels.
You may submit a question or offer feedback on the SupportPac but please be aware that a response is NOT guaranteed.
Copyright and trademark information
IBM, the IBM logo and ibm.com are trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at www.ibm.com/legal/copytrade.shtml.
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