Chapter 3. Operating NetView FTP V2.2.1 MVS - IBM

Appendix E. Factors That Affect the Performance of NetView
FTP V2.2.1 MVS
This appendix describes the factors and the parameters whose values affect the
performance of NetView FTP V2.2.1 MVS.
FSBSLOTS Queue Handler Initialization Parameter Value
The values specified for this parameter determine the following:
� The total number of subtasks that the queue handler can process concurrently.
� The number of subtasks that are reserved for TSO users.
The following factors must be taken into consideration when selecting these values:
� The larger the value, the less the wait time for a free FSB slot.
� The larger the value, the more wasted CSA storage during periods of low
queue handler activity.
� The total number of FSBSLOTS determines the maximum allowed number of
FSBXs. When selecting these values, the system administrator should consider
the following factors against each other:
– The probability of CSA shortages, due to a requirement for relatively large
numbers of concurrent FSBXs.
– The probability of queuing bottlenecks, due to relatively large numbers of
deferred requests.
� The ratio of slots reserved for TSO users determines the relative response
times for TSO users and for other subtasks.
CSAELIM Queue Handler Initialization Parameter Value
The value specified for this parameter determines the total amount of additional
CSA space that can be allocated for FSBXs at any one time. When selecting this
value the system administrator must consider the following factors against each
other:
� The amount of CSA space that can be allocated without affecting the general
system performance.
� The probability of queuing bottlenecks, due to a relatively large additional CSA
space requirement.
Unless you have common service area constraints, you can use the default
(NOLIM). However, take into consideration the maximum value at your installation.
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