Wednesday, December 2, 2020

Excel/Office files are taking very long time to open; Virtual memory/Page file configuration is not saving on Microsoft Windows Server 2016

This blog post is to share few issues with Microsoft ‘System Monitor’ (Sysmon).


Sysmon is a Windows system service  that helps to log system activity to the Windows event log. Many customers are relaying on this tool to collect additional logging, which helps to identify malicious or anomalous activity on their environment.

Below are the two symptoms identified with Sysmon driver version 11 on Microsoft Windows Server 2016.

1.Excel/Office files are taking very long time to open/SMB share is too slow.


If anyone try to access files from a Server installed with Sysmon Version11, the client may experience poor performance. For example, when they try to open an Excel file from another Machine may take more than a minutes and it gets stuck at 0% opening excel window. Pic below;










2.Virtual memory/Page file configuration is not saving.

It create a random paging file, not as per the desired configuration, what we set for ‘Initial and Maximum’ size at ‘System properties-Advanced-Performance Option’. Suppose we configure 2048 Mb, the System page file would appear a lower value instead of configured 2048Mb post server reboot.

As part of troubleshooting, Sysmon version11.0 was removed and reinstalled with Sysmon Version12.0, which resolved both the above issues.


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