This parameter determines whether the system generates CMRs, also called call diagnostic records. Valid
values specify Disabled (do not generate CMRs), Enabled Only When CDR Enabled Flag is True (generate
CMRs only when the CDR Enabled Flag service parameter is set to True), or Enabled Regardless of CDR
Enabled Flag (generates CMRs without regard to the setting in the CDR Enabled Flag service parameter).
This represents a required field. The default value specifies Disabled.
Feature Limitations
This feature is not supported for SME call flows:
• On receiving call statistics from CUBE/IOS GW on SME, Unified Communications Manager generates
CMR (provided CMR is enabled) for the trunk side, but it won’t be able to forward call statistics to other
nodes in outgoing BYE or 200OK for BYE.
• Sample Call flow:
Phone1 > CUBE/IOS GW > SME > CUCM1 > Phone2
For the above call scenario, SME generates the CMR for trunk side pointing to CUBE. These statistics
are not forwarded to a leaf node. For Phone2, CMR is recorded on a leaf node.
CPU Utilization
Cisco has performed basic testing to measure CPU utilization when CDRs and/or CMRs are enabled. The
CPU utilization testing was measured on subscribers and was not measured on the publishers. Your actual
results can vary because of the CDR Loader settings and the CDR Management settings for external billing
servers. The following table displays the results of these tests.
These tests were performed with Unified Communications Manager Release 8.0(1).
Note
Table 102: CDR and CMR CPU Utilization
% Increase in
CPU
% Increase in Cisco
Unified CM CPU
Average % Increase
in Total CPU
Utilization
Average % Increase
in Cisco Unified CM
CPU Utilization
CDRs and CMRs Enabled/Disabled
11.15
6.17
CDRs disabled, CMRs disabled
8.57
13.18
12.10
6.99
CDRs enabled, CMRs disabled
0.86
3.43
11.24
6.38
CDRs disabled, CMRs enabled
17.02
24.92
13.04
7.71
CDRs enabled, CMRs enabled
Call Reporting and Billing Administration Guide for Cisco Unified Communications Manager, Release 15 and SUs
370
CMR Records
CPU Utilization