OSI/FTAM Configuration and Management Manual

Monitoring FTAM Performance

OSI/FTAM Configuration and Management Manual—421944-001

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Reconfiguring OSI/AS Subsystem Attributes

Configuration attributes set in the underlying OSI/AS subsystem(s) can have a marked

effect on the performance of your FTAM applications. You should consider the number

of TAPS, TSP, and NSP processes you use, their relationships to one another, and the

values of various lower-layer service or profile parameters.

One OSI/AS configuration attribute that can affect FTAM performance is the maximum

TPDU size for TSP processes—the TPDUSIZE attribute of the Layer 4 PROFILE or

SERVICE object. The default value of TPDUSIZE is 512 bytes, which is appropriate if

the data-value parameter in your application’s calls to FTM_DATA_REQ_ and

FTM_DATA_IND_ is small (less than 450 bytes per call). However, if your application

is using a larger data-value size, you should reconfigure the TPDUSIZE attribute to take

advantage of blocked I/O operations. For TLAM-based or PAM-based configurations,

increase the value of this attribute to 8192 bytes; for X25AM-based configurations,

increase it to 4096 bytes. For TCP/IP-based configurations, increase it to 65531 bytes.

For details on configuration and performance tuning for the processes managed by

OSI/AS, see the OSI/AS Configuration and Management Manual.