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Cisco Unified Communications Manager Managed Services Guide
OL-22523-01
Chapter 3 Managing and Monitoring the Health of Cisco Unified Communications Manager Systems
RTMT Monitoring of Cisco Unified CM System Health
• LogPartitionHighWaterMarkExceeded—Occurs when the percentage of used disk space in the log
partition has exceeded the configured high water mark. When this alert is generated, Log Partition
Monitoring (LPM) utility starts to delete files in Log Partition until the Log Partition is down to the
low water mark to avoid running out of disk space. Since LPM may delete some files that you want
to keep, you need to act upon receiving LogPartitionLowWaterMarkExceed alert.
• LowActivePartitionAvailableDiskSpace—Occurs when the percentage of available disk space of the
Active Partition is lower than the configured value. Please use the default threshold that Cisco
recommends. At default threshold, this alert should never be generated. If this alert occurs, a system
administrator can adjust the threshold as temporary workaround but Cisco TAC should look into
this. One place to look is /tmp using remote access. We have seen cases where large files are left
there by 3rd party software.
• LowInactivePartitionAvailableDiskSpace—Occurs when the percentage of available disk space of
the InActive Partition is lower than the configured value. Please use the default threshold that Cisco
recommends. At default threshold, this alert should never be generated. If this alert occurs, a system
administrator can adjust the threshold as temporary workaround but Cisco TAC should look into
this.
Table 3-3 shows a comparison of disk-related perfmon counters between Cisco Unified CM Release 4.x
and Cisco Unified CM Release 5.x.
Table 3-3 Disk-Related Perfmon Counters
Cisco Unified CM Release 4.x Perfmon Counters Cisco Unified CM Release 5.x Perfmon Counters
Logical Disk % Disk Time Partition % CPU Time
Disk Read Bytes/sec Read Kbytes Per Sec
Disk Write Bytes/sec Write Kbytes Per Sec
Current Disk Queue Length Queue Length
Free Megabytes Used Mbytes
Total Mbytes
% Free Space % Used
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