$ top$ sar -u 1 1CPU Usage between 40 % and 90 % is generally considered healthy for most workloads.
If CPU Usage is consistently above 90 %, it may indicate that the server is overloaded, potentially leading to performance degradation. In such cases, it is recommended to scale horizontally by adding more servers or vertically by increasing the CPU count or using more powerful CPUs.
Conversely, if CPU Usage is consistently below 40 %, the server may be underutilized or even unused. In such situations, it might be possible to downsize the server or power it off if it is confirmed to be unnecessary.