The program atop is an interactive monitor to view the load on a Linux system. It shows the occupation of the most critical hardware resources (from a performance point of view) on system level, i.e. cpu, memory, disk and network.
It also shows which processes are responsible for the indicated load with respect to cpu- and memory load on process level. Disk load is shown if per process “storage accounting” is active in the kernel or if the kernel patch âcntâ has been installed.
Network load is only shown per process if the kernel patch âcntâ has been installed. Every interval (default: 10 seconds) information is shown about the resource occupation on system level (cpu, memory, disks and network lay-ers), followed by a list of processes which have been active during the last interval (note that all processes that were unchanged during the last interval are not shown, unless the key âaâ has been pressed).
# yum insall atop
# atop
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