hight CPU utilization after start services

  • 15 April 2021
  • 6 replies

Badge +3
  • Commvault Certified Expert
  • 8 replies

Hi All;

What could be the reason very hight CPU utilization after only start services CV. This is server with 10 x 2TB disk and millions small files. This is fresh installaton (version 11.20.40).





Best answer by Pawel 28 April 2021, 19:26

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6 replies

Userlevel 5
Badge +8

Hi Pawel, 


Would you be able to give me some further information.

  1. Are you talking about the a Commserve, Media Agent or a Client?  (I assume Client, Is so what OS)
  2. What are the specifications of the Server?
  3. Do you have any antivirus enabled? Are the exclusions in place? 


Userlevel 7
Badge +23

@Pawel , have you had a chance to look at @Blaine Williams ‘s suggestions?  Let us know if you are still having this issue.


Userlevel 4
Badge +9

Hi @Pawel,

While we’re awaiting your confirmation of which server this is, I want to also mention the following:

Maintenance Release 20.46 is available which has a patch for performance issues and will include a patch found in 20.41 as well.

Commserve may use high memory and CPU

3646, 3647, 3648


Automatic backup copy schedules may cause SQL server process to consume 100% CPU.

3457, 3458


In addition to these patches, if your Commserve is a VM this might be a good time to confirm that it is utilizing the best provisioning for your environment:


  • For SQL Server 2014, license is limited to lesser of 4 sockets or 16 cores, or whichever comes first.
  • For SQL Server 2016/2017/2019, license is limited to lesser of 4 sockets or 24 cores.
  • For SQL Server scheduler, use NUMAs for distributing or scheduling SPID load.
  • For VMs with more than 4 sockets, SQL Server uses only the first 4 sockets and considered as a bad VM configuration.
  • Each VM socket should have its own NUMA association for SQL Server Schedulers and CPUs with more than 4 per NUMA.
  • SQL Server VMs should have matching, dedicated physical CPUs on the VM Host. The VMs must not be shared for best performance.
  • SQL Server VMs for database IO drives should have 30 IOPS or better performance


In addition to confirming the provisioning of 50% available memory to SQL server and an ideal cpu configuration for SQL server (strictly speaking for the Commserve server) I also recommend updating to sql server 2014 or 2016 if you are running an older version on the Commserve as we have seen confirmed stability and performance improvements here.

Userlevel 6
Badge +15

I agree with all the potential paths mentionned above to follow.

I’d add that if it’s a Filesystem agent client with the Advanced options to track changes on the files like this : 

FS Agent / subclient / Advanced Properties / Advanced Options / Scan options

If you have lots of files changed after a reboot, or update, this could occur, until the scan is complete.

But, we need to get more background information to properly assist :slight_smile:

Userlevel 4
Badge +9

Hi @Pawel 

Following up to confirm if you have had a chance to review and if you can confirm if this is for the commserve or a different server

Badge +3

Hi All;

I am sorry for delay in answer, thank you for all suggestions , I tested all this options but finally I was opened the SR.

The problem was resolved when I set this additional settings:

Monitoring File Anomalies