- High kernel or system CPU utilization can be an indication of shared resource contention or a large number of interactions between I/O devices.
- The ideal situation for maximum application performance and scalability is to have 0% kernel or system CPU utilization since CPU cycles spent executing in operating system kernel code are CPU cycles that could be utilized by application code.
- Hence, one of the objectives to achieving maximum application performance and scalability is to reduce kernel or system CPU utilization as much as possible.
This is something I didn't know before.
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