OSI/AS Configuration and Management Manual

Performance Considerations
OSI/AS Configuration and Management Manual—424119-001
6-4
Process Attributes
Process Attributes
The processes in your OSI/AS subsystem include
•
OSI manager process
•
TAPS processes (provided by OSI/AS)
•
TSP processes (provided by OSI/TS)
•
NSP processes (provided by X25AM or TLAM on D-series releases and PAM on
G06 and above releases)
•
Application processes
For each process you add to your subsystem, you should consider the following OSI/AS
PROCESS and SUBSYSTEM attributes, as described in the following subsections:
•
MAXCONNECTIONS Attribute on this page
•
PRIORITY Attribute on this page
•
SWAP Attribute on this page
•
MAXTAPS, MAXTSP, and MAXNSP Attributes on page 6-5
MAXCONNECTIONS Attribute
The MAXCONNECTIONS attribute is valid for TAPS and TSP processes. It defines the
maximum number of concurrent connections that a TAPS or TSP process may have.
You should define a value that is appropriate for your subsystem, based on the amount
of activity and the duration of the connections anticipated at any one time.
The MAXCONNECTIONS attribute also allows TAPS processes to divide large-sized
messages into smaller segments for transmission to TSP processes. If the value for the
TAPS process is set low, the TAPS processes allow large-sized segments, and, therefore,
greater throughput. If the value is too low, it may cause connections to be delayed,
resulting in longer response times for the users of the subsystem. If the value is set too
high, the TAPS processes divide the messages into very small segments (as small as
1000 bytes), which reduces throughput.
PRIORITY Attribute
The PRIORITY attribute specifies the execution priority for the process. If the value is
set too low, the process may cause congestion. If the value is set too high, the process
may shut out other processes. Remember to also consider any other non-OSI processes
that might be running in the same CPU(s).
SWAP Attribute
The SWAP attribute specifies the swap disk volume to be used when the process is
started. Select a volume that has adequate space and is not overutilized—as you add
more subdevices, you need more swap space. Heavy system demands on your swap disk
volume can cause contention problems.