Adjust WaterMark in RTMT of Call Manager Procedure

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Updated:April 25, 2023
Document ID:200581

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    Introduction

    This document describes the procedure to create additional disk space in logging partition of Cisco Call Manager with High and Low WaterMark settings.

    Prerequisites

    Requirements

     There are no specific requirements for this document.

    Components Used

    The information in this document is based on these software and hardware versions:

    • Cisco Call Manager version 10.0.1-10000-24
    • Cisco Real-Time Monitoring Tool (RTMT) version 10.0(001)

    The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

    Background Information

    Tip: The information in this tech document also applies to adjust the watermark in RTMT for the Cisco IM and Presence Service Server.

    Low WaterMark is a percentage value of the total logging disk space post which when you receive an alert, indicates the disk space is full by the configured percentage of Low WaterMark.


    High WaterMark is a percentage value of the total logging disk space post which the older log files are purged.


    High WaterMark Exceeded and Low WaterMark Exceeded are events that indicate the percentage of used disk space in the logging partition.


    LogPartitionHighWaterMarkExceeded

    This event indicates that the percentage of used disk space in the log partition has exceeded the configured High Watermark.

    LogPartitionLowWaterMarkExceeded

    This event indicates that the percentage of used disk space in the log partition has exceeded the configured Low WaterMark.


    The threshold percentage value of both of these events could be configured in RTMT based on the requirement. By Default High WaterMark is set to 95% of the total logging partition and Low WaterMark is set to 90% of the total logging partition.

    At times, a need arises when there is insufficient space in the Logging Partition and additional space needs to be created for certain activities in the call manager to take place. During such events, additional space could be created in the Logging Partition, and adjust the threshold values of High WaterMark and LowWaterMark respectively.

    When the threshold value of High WaterMark is lowered, it would purge the older log files, and this would create additional disk space in the logging partition.

    Procedure

    Adjust Low WaterMark

    Launch RTMT, and log in to the desired cluster, and on the left pane navigate to System > Tool > Alert Central.

    On the right pane, under System Right, click LogPartitionLowWaterMarkExceeded > Set Alert/Properties.

    Adjust Low WaterMark under Alert Central in the RTMT.

    Click Next.

    Alert Properties: LogPartitionLowWaterMarkExceeded

    By default, Low WaterMark is set to 90%.

    Alert Properties: Threshold.

    Set theLow WaterMark to a lower value, based on your requirement and then click Next.

    Alert Properties: Threshold.

    Click Next.

    Alert Properties: Frequency and Schedule

    Click Save.

    Alert Properties: Email Notifications.

    Adjust High WaterMark

    When on the right pane, under System Right, click LogPartitionHighWaterMarkExceeded > Set Alert/Properties.

    Adjust High WaterMark

    Click Next.

    Alert Properties: LogPartitionHighWaterMarkExceeded

    By default, High WaterMark is set to 95%.

    Alert Properties: Threshold.

    Set the High WaterMark to a lower value, based on your requirement, and then click Next.

    Alert Properties: Threshold.

    Click Next.

    Alert Properties: Frequency and Schedule

    Click Save.

    Alert Properties: Email Notifications.

    Verify

    The additional disk space is created in the logging partition. After you adjust the High and Low WaterMarks, it can be verified through the Show Status command on the CLI on the Call Manager.

     Before the WaterMark was adjusted.  

    admin:show status 

    Host Name          : publisher
    Date               : Thu Jul 21, 2016 16:07:16
    Time Zone          : India Standard Time (Asia/Kolkata)
    Locale             : en_US.UTF-8
    Product Ver        : 10.0.1.10000-24
    Unified OS Version : 10.0.0.0-2

    Uptime:
     16:07:17 up 72 days, 21:01,  1 user,  load average: 0.21, 0.16, 0.11

    CPU Idle:   93.06%  System:   02.40%    User:   04.29%
      IOWAIT:   00.25%     IRQ:   00.00%    Soft:   00.00%

    Memory Total:        8062096K
            Free:         133808K
            Used:        7928288K
          Cached:        3312040K
          Shared:              0K
         Buffers:         342228K

                            Total            Free            Used
    Disk/active         22187548K        9256672K       12705464K (58%)
    Disk/inactive       22187548K       20884420K         176064K (1%)
    Disk/logging        77201424K       47443520K       25836240K (36%)

    After the WaterMark was adjusted.

    admin:show status 

    Host Name          : publisher
    Date               : Thu Jul 21, 2016 16:35:48
    Time Zone          : India Standard Time (Asia/Kolkata)
    Locale             : en_US.UTF-8
    Product Ver        : 10.0.1.10000-24
    Unified OS Version : 10.0.0.0-2

    Uptime:
     16:35:49 up 72 days, 21:29,  1 user,  load average: 0.09, 0.12, 0.16

    CPU Idle:   98.61%  System:   00.88%    User:   00.51%
      IOWAIT:   00.00%     IRQ:   00.00%    Soft:   00.00%

    Memory Total:        8062096K
            Free:        1957460K
            Used:        6104636K
          Cached:        1477332K
          Shared:              0K
         Buffers:         360100K

                            Total            Free            Used
    Disk/active         22187548K        9256660K       12705476K (58%)
    Disk/inactive       22187548K       20884420K         176064K (1%)
    Disk/logging        77201424K       54805132K       18474628K (26%)

    As seen in the Show Status output, the percentage value of the Used Disk/Logging partition has changed from 36% to 26%.

    Troubleshoot

    There is currently no specific information available to troubleshoot this configuration.

    Revision History

    Revision Publish Date Comments
    3.0
    25-Apr-2023
    Removed PII. Updated Title, Table of Contents, Introduction, Gerunds, Style Requirements, and Formatting.
    2.0
    15-Mar-2022
    Grammar updates.
    1.0
    25-Jul-2016
    Initial Release
    TAC Authored

    Contributed by Cisco Engineers

    • Sankalp Jain
      Cisco TAC

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