Analyzing and Optimizing System Performance for Your IBM System z Installation

During this class, we discuss a set of real performance reports from an anonymous customer. In addition, attendees can bring their own reports from RMF, Omegamon, or another monitor to be analyzed individually after class hours. The class discusses features available up through z/OS V1.13. The major topics covered in the class are:

• Processor performance, including Parallel Sysplex performance
• I/O considerations
• Central and virtual storage considerations
• Workload analysis

This class is up-to-date. Each new function in hardware (in a z196, for example) or in software (in z/OS V1R13, for example) affecting system performance is included in the class, with real life examples, if possible. Here are some recent topics:

• WLM Capacity Provisioning
• 1 MB address pages
• HiperDispatch
• MIDAW
• New FICON channel protocol (no more CCWs?)
• Performance recommendations on CF duplexing
• Saving MIPS
• Fact: z/OS is not now a fully preemptible operating system. What are the consequences?
• New discoveries about MSU/hr, MIPS, cycle time, ITR - do not miss
• How to manage the WLM goals of CICS, IMS/DC and WebSphere workloads
• The enclave concept
• Trading central storage by CPU (such as DB2 buffer pool page fixing) and by I/O (such as VSAM SMB)
• How to encrypt without spending many CPU cycles
• Why we need zAAPs and zIIPs and how they are managed by z/OS
• What is a CMR delay during an I/O operation?
• Capping or not? If yes, what type?
• The consequences of the WLM aging algorithm
• How to improve DASD performance today
• The mysterious QDIO algorithm
• The possible revival of IRD dynamic channel management (DCME) for FICON channels