Monthly Archives: August 2014

SCOM: Management pack updates

Microsoft recently released updates to several management packs, including the following:

Windows Base OS MP – updated to version 6.0.7230.0 and is available for download here.

Fixed issues:

  • Bug fixed: Microsoft.Windows.Server.LogicalDiskDiscovery.Module.Type.vbs script does not discover logical disks with large disk size
  • Update to support two configurable threshold values (waiters and timeouts) for triggering alert ‘MAX concurrent API Reached’

Jimmy Harper has also written a nice summary of the “Max Concurrent API Monitor” fix included in the new version of the Windows Server Operating System Management Pack

One change that may require some attention is the update to the “Max Concurrent API Monitor”.

In the previous version of the MP (6.0.7061.0), the Max Concurrent API monitor would run a script that looks at three Netlogon semaphore counters (Waiters, Holders, and Timeouts).  If any of them are greater than 0 and less than 4gb, then we generate an alert. Some customers were seeing false alerts from the Monitor due to some of the counters (especially Semaphore Holders) being greater than zero during non-problematic conditions.

In the new version of the Management Pack, the Max Concurrent API Monitor has the following changes:

  • The Semaphore Holders counter has been removed from the criteria that generates the alert
  • The Alert will only be generated if Semaphore Waiters or Timeouts exceed a defined threshold (instead of 0).  These thresholds can be configured as needed via Overrides.  The default thresholds are:
  • Semaphore Waiters = 50
  • Semaphore Timeouts = 2000

More information on the MaxConcurrentAPI setting can be found here.


Active Directory – updated to version 6.0.8293.0 and is available for download here.

Fixed issues:

  • Issue fixed: AD-Trust Monitor does not come back to healthy state
  • Issue fixed: AD_Database_and_Log.vbs does not support using ‘.’ as decimal sign for non-English account.

Cluster – updated to version 6.0.7230.0 and is available for download here.

Fixed issues:

  • Cluster 2008 MP does not collect certain performance metrics.

DNS  – updated to version 7.1.10259.0 and is available for download here.

Fixed issues:

  • DNSMetrics2012R2Probe script can cause high CPU in MonitoringHost.exe

DHCP – updated to version 6.0.7230.0 and is available for download here.

Fixed issues:

  • Various, see guide for full details


SCOM: Updated MP PKI Certificate Verification

Yesterday a new version of the PKI Certificate Verification management pack was released by Raphael Burri, version contains the following changes:

This update is mostly about more powerful filtering options for the certificate discoveries

  • It is now possible to use regular expressions to:
    • Include / Exclude based on “Subject”
    • Include / Exclude based on “Issuer”
    • Exclude based on “Enhanced Key Usage” OIDs

    Note that the filters will have to be based on the exact string output of the certificate objects as presented in PowerShell. Hence check those before attempting to write RegEx filters using:

     ls cert:\LocalMachine\My | fl Subject, Issuer

Click here for additional information.

It is available for download here