To compute the number of CPU cores available on the workstation, the following
command can be used:
# dmidecode | grep "Core Count" | /usr/bin/awk '{SUM += $3} END {print SUM}'
In situations where 5620 SAM is asked to collect more performance statistics than it can
process in the specified polling period, the
PollerDeadlineMissed
alarms will start
appearing. These alarms indicate to the user that the polling mechanisms within 5620
SAM cannot retrieve the requested information within the specified polling period.
Should this situation arise, the polling period for statistics should be increased or the
number of objects that are applied to Statistics Poller Policies should be reduced.
Performance statistics collection and network latency
5620 SAM collection of performance statistics from a single network element may be
limited due to the round trip delay caused by network and network element latency. 5620
SAM collects performance statistics records using SNMP. One record is collected at a
time to limit the load on the network element. Therefore, round trip latency will directly
impact the maximum number of performance statistics records collected. As an example,
if the round trip latency is 100ms, and we target a completion time of 66% of the
collection interval (to allow for processing variances and other system impacts), the
maximum number of performance statistics records that can be collected from one
network element in a 15 minute interval would be 6000 records (66% of 900 seconds
divided by 100 ms latency).
Accounting statistics
Refer to the
5620 SAM Statistics Management Guide
to find the steps required to
configure 5620 SAM to retrieve and process accounting statistics.
The quantity of resources which are allocated to the retrieval and processing of
accounting statistics within the 5620 SAM Server or Auxiliary Statistics collector are set
at the installation time and depend on the number of CPU Core available to the 5620
SAM Server or Auxiliary Statistics collector software. The number of CPU Cores
available to the server depends on the number of CPU Cores on the workstation and
whether the 5620 SAM Database software is collocated with the 5620 SAM Server
software on the same workstation.
An accounting statistic record is the statistic for one queue for one SAP. For example, if 2
ingress and 2 egress queues are configured per SAP, the “Combined Ingress/Egress”
statistic represents 4 5620 SAM accounting statistic records.
It is recommended that the Accounting Policy Interval and the File Policy Interval be
aligned to the same period. Misalignment of the policy periods can cause 5620 SAM
resource contention for both performance and accounting statistics processing.
Scaling
Scaling guidelines for statistics collection
Statistics collection
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5620 SAM
3HE-09809-AAAG-TQZZA 13.0 R7
Issue 1
December 2015
