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recently , we upgrade our redhat server ( version 7 ) from 4 CPU CORE to 32 CPU CORE

is it possible to know which CPU was triggered during last day ?

I mean how to know if the additional CPU that we add are now in process ?

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  • You can use something like nmon to capture resources daily and write it to a file. You can then review the files the next day. Commented Dec 1, 2018 at 18:07
  • this tool isn't installed by default , but do we have the ability to capture which cpu are active by - top ? Commented Dec 1, 2018 at 18:16

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top command would be helpful. Use top command to list the utilization of each core. Press 1 if necessary to split the CPU row into a separate row for each core.

You can also add a column that shows the last-used core for each process. Press f to bring up the field list, then select column P and press d or <space> to toggle the value. Now, press q or <Esc> to end and see live. In right side you will see a column P which shows cpu core no. used by corresponding processor.

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