SNMP Configuration and Management Manual

IPX/SPX Subagent (G-Series)
SNMP Configuration and Management Manual—424777-006
13-9
Resource Utilization
When a connection has a state of disconnected and a state reason of
operatorrequest, the subagent does not attempt to re-establish the connection
when the keep-alive interval has elapsed, because the disconnection was deliberate.
The subagent attempts to re-establish only connections inadvertently lost.
Resource Utilization
Several subagent attributes affect its CPU time and memory utilization:
CPU time utilization for request processing cannot be tuned. However, you can
influence subagent CPU time usage in several ways:
•
The lower the value of the -k startup parameter and its corresponding MIB object,
tdmNwSaKeepAliveTimer, the greater the amount of CPU time utilized. This value,
called the keep-alive interval, is the rate at which the subagent attempts to
reconnect to IPXPROTO, SNMP agent, or EMS collector processes when a
connection to one of them fails.
•
The lower the value of the -r startup parameter and its corresponding MIB object,
tdmNwSaRefreshTimer, the greater the amount of CPU time utilized. This value,
called the refresh rate, is the frequency at which the subagent refreshes data
describing IPXPROTO processes. Updating the tdmNwServerTable, which can be
quite large, is the principal factor in CPU time utilization.
•
Setting the value of tdmNwSaRefreshNow to forceDynamicRefresh increases
CPU time utilization while values are updated.
•
Running the subagent with a backup process increases CPU time utilization
slightly.
Memory utilization cannot be tuned. The amount of memory utilized varies
proportionally with the number of IPXPROTO and SNMP agent connections the
subagent is managing. Running the subagent with a backup process increases
memory usage in the backup CPU.
subagentkeepalive The subagent successfully connected to a previously
connected process that failed. The rate at which the
subagent attempts reconnections, called the keep-alive
interval, is controlled by the -k startup parameter. By
default, the subagent attempts to reconnect every 60
minutes.
invalidprocessname An invalid process name was specified at startup.
incorrectprocessname A process name specified in a startup parameter or Set
request does not describe a connection of the type
supported by the parameter or MIB object.
resourceproblem The connection is unavailable because of a process
failure or interprocess communications failure.