The activity monitor job cache is using a large amount of heap space.

Problem

To support better performance in the activity monitor in the Web UI, NetBackup is caching job data in memory.  When the job cache reaches a threshold of 17% of total available memory,  an alert is generated warning an administrator that system performance may be impacted.The alert will appear once every 30 days provided the cache size remains above 17% at the time of the next warning interval.

If the job cache consumes an extremely large amount of heap space (more than 30%), the web service may become unresponsive.
 

Error Message

The activity monitor job cache uses a large amount of heap space. System performance may be impacted. See https://www.veritas.com/support/en_US/article.100049808 for more details.

Cause

A large number of jobs are being cached in memory.

Solution

If system performance is impacted, an administrator can do one or more of the following:

• Change the number of hours jobs that are retained in NetBackup to reduce the number of cached jobs.  Default is 78.
  • KEEP_JOBS_HOURS
  • KEEP_JOBS_SUCCESSFUL_HOURS
     
• Increase the Xmx heap size for the NetBackup web server.
  
  Rough calculation for deciding what value to use:
  jobs per day * KEEP_JOBS_SUCCESSFUL_HOURS / 24 * single job memory usage / desired ratio
  
  Example calculation for 200k jobs per day, successful jobs kept for 168 hours (1 week), and a desired 15% memory usage (each job takes up roughly 1KB of web service memory):
  200000 * 168 / 24 * 1000 / .15 = 9.3333333 GB
   

  1. If not present. Create the wmcConfig script in the appropriate NetBackup configuration directory.

     • Windows: install_path\Veritas\NetBackup\var\global\wsl\config\wmcConfig.bat
     • UNIX and Linux: /usr/openv/var/global/wsl/config/wmcConfig.sh
       
       Ensure root has execute permissions on the script.
        

  2. Add a line to the end of the script setting the WMC_HEAP variable. Refer to the Oracle JVM documentation for information on valid values, specifically the -Xmx option.

     • Windows example (10 GB)
       SET WMC_HEAP="10000m"
        
     • UNIX and Linux example (10 GB)
       WMC_HEAP="10000m"
        
  3. Restart the NetBackup Web Management Service to apply the configuration changes.