ASAP 3.0 Client Manual

HP NonStop ASAP Client Manual Page 118 of 161
also specifies that ASAP performs synchronized updates based on the host data
arrival rate from your remote host nodes (specified by the ASAP SET RATE
command).
When you select Automatic and a Host Session is in progress, the update interval
automatically appears in parentheses next to the Automatic option.
Automatic is the recommended setting.
Fixed Interval
To manually specify the ASAP update interval in seconds, select the Fixed Interval
option.
This value is used as the periodic update interval instead of the value automatically
determined when you select the Automatic option. Use the Automatic option unless
you are manually forcing the update interval for a special reason, such as mixed host
data arrival times.
Sample Delay Options
The Computed (recommended) and Manual sample delay options control the number
of seconds added to the ASAP Client host data retrieval time. This option gives the
host network and disk I/O enough time to finish before ASAP starts a new host
retrieval sample.
Computed
To automatically determine the ASAP Client host data retrieval time, select the
Computed option. HP recommends the Computed option; however, if chronic and
spurious queuing is occurring on host servers, you might want to use the Manual
option.
Manual
To manually control the number of seconds added to the ASAP Client host data
retrieval time, select the Manual option. Use this advanced function only if chronic
queuing is occurring on host servers. If you experience excessive host queuing,
configure the Manual setting equal to the peak number of seconds that it takes for all
host I/O to settle against the host server.
Trace Requests Check Box
To have requests to the host system traced in the ASAP Session window, check the
Trace Requests check box. Select Session from the View menu of the Browse window
to view this trace. Because ASAP performance is degraded while tracing, you should
usually disable tracing.