Server perfoming very slow

  • 10 June 2021
  • 3 replies

Badge +1

Nutanix, AHV, MS Server 2016 installed with IIS, Media Wiki.

Out of the blue, the server performs very slow.  The MediaWiki site takes forever to load ( at times a Server 500 error appears when going to the MediaWiki site from a desktop).  Opening the console shows the Server logon window but very slow.  Everything is very slow.  Once logged on, it takes almost 20 min for the server management window to open.

Currently, vCPU=6, Cores per CPU=4, RAM 16

CPU Usage around 10% and Memory usage around 17%

Only server that acts like that.  Ran DISM /Online /Cleanup-Image /ScanHealth and so on and everything is ok/ no problems. Rebooted all hosts.

Not sure what caused this all of a sudden ….

3 replies

Userlevel 1
Badge +4

You are probably running into a NUMA issue: CPU Configuration.

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I changed the vCPU and Core to 4:1, 2:1, 6:1, 8:2, 6:2 and so on but I don’t see any differences.  The entire VM still responds very slow. The Cluster CPU Usage is ~18% and the Cluster Memory Usage is ~60%.  It seems the resources are not the problem.

The Health Check shows two failures.  LDAP (which is not configured) and a Inter CVM Latency.  Selecting the Inter CVM Latency shows the three hosts with green entries (ok) and the Cluster Name with no entries.

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FYI - Restoring to earlier snapshots doesn’t make no difference.  The entire VM continues to behave very slow...