|March 16, 2007||z/VM V5.2 (or later) is a prerequisite for running z/VSE V4.1, V4.2, V4.3 or V5.1 under z/VM.
If you IPL z/VSE V4.1, V4.2, V4.3 or V5.1 in a guest system of z/VM version 4 or z/VM 5.1, you may experience severe performance problems. Because of that the following message is issued:
If you receive this message, you must urgently upgrade your VM system to z/VM 5.2 or a later release.
|November 1, 2006||z/VSE CPU Monitor Tool
The z/VSE CPU Monitor Tool is intended to help customers to measure the CPU utilization of their z/VSE system over a period of time. Especially when you plan for a processor upgrade it is very important to know the CPU utilization of your z/VSE system over a day or a week. This helps you to estimate the size of the new processor.
|October 25, 2005||Important considerations when planning for a harware upgrade:
Although z/VSE supports up to 10 processors, it is not recommended to run z/VSE with more than 3 processors active. In most cases a z/VSE system runs best on a uni-processor system. So its better to use a larger uni-processor than multiple smaller processors, even if the sum of the processors would result in the same capacity.
|October 25, 2005||IBM Processor Capacity Reference for IBM System z (zPCR)
zPCR is designed to provide capacity planning insight for IBM System z processors running various workload environments. z/VSE customers are encouraged to use the zPCR tool with the z/VSE workloads Batch, Online or Mixed for capacity planning.
The information contained in these documents has not been submitted to any formal IBM test and is distributed on an "AS IS" basis without any warranty either express or implied. The use of this information or the implementation of any of these techniques is a customer responsibility and depends on the customer's ability to evaluate and integrate them into the operational environment. While each item may have been reviewed by IBM for accuracy in a specific situation, there is no guarantee that the same or similar results will be obtained elsewhere. Customers attempting to adapt these techniques to their own environments do so at their own risk.
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