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67 — Statistics collection overview
67-4 December 2009 Alcatel-Lucent 5620 Service Aware Manager, Release 7.0 R6
Statistics Management Guide 3HE 04551 AAAE Ed. 01
File policies
A file policy specifies the relative size, storage location, and backup location of the
files on the NE that contain accounting statistics data. An NE collects accounting
statistics based on the collection interval specified for a SAP, network port, or
subscriber in an accounting policy, and writes the statistics data in XML format to a
file on the NE. After the rollover period specified in a file policy, the NE closes and
compresses the file. The NE then notifies the 5620 SAM that a new file is ready for
processing.
One file policy can be defined as a default policy and is automatically associated with
an accounting policy if no file policy is specified.
Statistics policies
A statistics policy specifies a retention period and alarm thresholds for a statistics
record. The retention period defines how long the 5620 SAM database retains the
statistics record after collection, which affects the database storage requirements.
When statistics collection is enabled, the oldest statistics records are periodically
removed from the database. When the collection interval is short and the retention
period is long, more disk space is required to store the statistics data.
MIB statistics policies
The collection of performance statistics from NEs is controlled by MIB statistics
polices that specify an administrative state, polling synchronization start time, and
collection interval. There are two types of MIB statistics policies:
NE MIB statistics policies
specific MIB statistics policies
Each type of MIB statistics policy contains a list of MIB entry policies. A MIB entry
policy defines the collection criteria for a specific MIB row. In an NE MIB policy, a
MIB entry policy applies to all objects on the NE that use the MIB entry. In a specific
MIB policy, the MIB entry policy applies only to the specified objects on the NE. For
example, the sapEgrQosPlcyQueueStatsEntry MIB entry applies to L2 and L3 SAPs.
In an NE MIB statistics policy, selecting this MIB entry enables collection of the
entry on all L2 and L3 SAPs on the NE. In a specific MIB statistics policy, selecting
this MIB entry enables collection only on the selected L2 or L3 SAPs.
If the statistics collection time required for a MIB entry exceeds the collection
interval specified in the MIB statistics policy, the 5620 SAM raises an alarm. A
5620 SAM operator can change the polling interval for a statistics class to prevent
this. See chapter 68 for information about modifying polling criteria.
The collection of MIB statistics counters is disabled by default. See chapter 68 for
information about enabling performance statistics collection.
Note — You can configure the length of time that the 5620 SAM
database globally retains accounting statistics data. See chapter 18 for
information on configuring the accounting statistics data retention
period.
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