2. PERFORMANCE REPORTING ANALYSIS › 2.3 Auxiliary Storage Management Analysis › 2.3.5 Case Study › 2.3.5.1 Problem Description

2.3.5.1 Problem Description

The purpose of this study is to review the ASM configuration
for a 3033 running MVS/SP 1.1 with the extended swap IUP.
The configuration was modified to remove two drums and two
3350 swap data sets.  The new ASM configuration is isolated
on channel 1 with an alternate path on channel 7.  It was
decided to place the common and PLPA data sets on the same
volume.  Because this system is at an SP 1.1 level, this is
appropriate (see Section 2.3.4.1 for SP 1.3 considerations).

The study has the following objectives:

    o  Ensure that local paging does not suffer from the
       removal of the drums.

    o  Look for page response problems.

    o  Verify that "low activity" data sets on the swap
       volumes have not caused problems.

    o  Check for any overloading conditions.

    o  Review the initial size estimates.

The first step is to use the ASM Page/Swap Response Time
Report to produce a before and after change overview of the
configurations.  We chose the WEEKS time-span because gross
trending is our basic objective.  To review the operation and
service given by each of the individual data sets, we produce
the ASM Page/Swap Activity Report at an hourly level.