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resource,type,command,description
cpu,utilization,"vmstat 1","system-wide: us + sy + st"
cpu,utilization,"sar -u","system-wide: sum fields except %idle and %iowait"
cpu,utilization,"dstat -c","system-wide: sum fields except idl and wai"
cpu,utilization,"mpstat -P ALL 1","per-cpu: sum fields except %idle and %iowait"
cpu,utilization,"sar -P ALL","per-cpu: same interpretation as mpstat"
cpu,utilization,"top","per-process: %CPU"
cpu,utilization,"htop","per-process: CPU%"
cpu,utilization,"ps -o pcpu","per-process CPU usage"
cpu,utilization,"pidstat 1","per-process: %CPU"
cpu,utilization,"top","per-kernel-thread: toggle K, VIRT == 0 heuristic"
cpu,utilization,"htop","per-kernel-thread: toggle K, VIRT == 0 heuristic"
cpu,saturation,"vmstat 1","system-wide: r > CPU count"
cpu,saturation,"sar -q","runq-sz > CPU count"
cpu,saturation,"dstat -p","run > CPU count"
cpu,saturation,"/proc/PID/schedstat","per-process: 2nd field run_delay"
cpu,saturation,"perf sched latency","average and maximum scheduler delay"
cpu,saturation,"SystemTap schedtimes.stp","queued(us) scheduler latency"
cpu,errors,"perf","processor-specific correctable/uncorrectable errors"
memory_capacity,utilization,"free -m","Mem and Swap usage"
memory_capacity,utilization,"vmstat 1","free memory and swap usage"
memory_capacity,utilization,"sar -r","%memused"
memory_capacity,utilization,"dstat -m","free memory"
memory_capacity,utilization,"slabtop -s c","kernel slab memory usage"
memory_capacity,utilization,"top","RES, VIRT per-process and system summary"
memory_capacity,utilization,"htop","RES, VIRT per-process and system summary"
memory_capacity,saturation,"vmstat 1","si/so swapping activity"
memory_capacity,saturation,"sar -B","pgscank + pgscand scanning"
memory_capacity,saturation,"sar -W","paging activity"
memory_capacity,saturation,"/proc/PID/stat","minor fault rate (min_flt)"
memory_capacity,saturation,"dmesg | grep killed","OOM killer activity"
memory_capacity,errors,"dmesg","physical memory failures"
memory_capacity,errors,"SystemTap uprobes","failed malloc() tracing"
network_interfaces,utilization,"sar -n DEV 1","rxKB/s and txKB/s vs max"
network_interfaces,utilization,"ip -s link","RX/TX throughput vs bandwidth"
network_interfaces,utilization,"/proc/net/dev","RX/TX bytes vs max"
network_interfaces,utilization,"nicstat","%Util metric"
network_interfaces,saturation,"ifconfig","overruns and dropped packets"
network_interfaces,saturation,"netstat -s","TCP retransmits"
network_interfaces,saturation,"sar -n EDEV","drop and fifo metrics"
network_interfaces,saturation,"/proc/net/dev","RX/TX drops"
network_interfaces,saturation,"nicstat","Sat metric"
network_interfaces,saturation,"dynamic tracing","TCP/IP stack queueing"
network_interfaces,errors,"ifconfig","errors and dropped packets"
network_interfaces,errors,"netstat -i","RX-ERR and TX-ERR"
network_interfaces,errors,"ip -s link","error counters"
network_interfaces,errors,"sar -n EDEV","rxerr/s and txerr/s"
network_interfaces,errors,"/proc/net/dev","errs and drop counters"
network_interfaces,errors,"/sys/class/net","driver-specific counters"
storage_device_io,utilization,"iostat -xz 1","%util per device"
storage_device_io,utilization,"sar -d","%util per device"
storage_device_io,utilization,"iotop","per-process disk I/O"
storage_device_io,utilization,"pidstat -d","per-process disk I/O"
storage_device_io,utilization,"/proc/PID/sched","iowait_sum statistic"
storage_device_io,saturation,"iostat -xnz 1","avgqu-sz > 1 or high await"
storage_device_io,saturation,"sar -d","queue size and await"
storage_device_io,saturation,"block probes","queue length and latency"
storage_device_io,saturation,"dynamic tracing","I/O subsystem latency"
storage_device_io,errors,"/sys/devices/.../ioerr_cnt","device I/O error count"
storage_device_io,errors,"smartctl","SMART disk errors"
storage_device_io,errors,"dynamic tracing","I/O response errors"
storage_capacity,utilization,"swapon -s","swap usage"
storage_capacity,utilization,"free","swap memory usage"
storage_capacity,utilization,"/proc/meminfo","SwapFree / SwapTotal"
storage_capacity,utilization,"df -h","filesystem usage"
storage_capacity,saturation,"filesystem full","ENOSPC condition"
storage_capacity,errors,"strace","ENOSPC syscall errors"
storage_capacity,errors,"dynamic tracing","ENOSPC tracing"
storage_capacity,errors,"/var/log/messages","filesystem errors"
storage_controller,utilization,"iostat -xz 1","sum devices vs controller limits"
storage_controller,saturation,"storage device metrics","inherits device saturation"
storage_controller,errors,"storage device metrics","inherits device errors"
network_controller,utilization,"ip -s link","interface throughput vs controller max"
network_controller,saturation,"network interface metrics","inherits interface saturation"
network_controller,errors,"network interface metrics","inherits interface errors"
cpu_interconnect,utilization,"CPC counters","throughput vs max"
cpu_interconnect,saturation,"CPC counters","stall cycles"
cpu_interconnect,errors,"CPC counters","available error counters"
memory_interconnect,utilization,"CPC counters","bus throughput or CPI > 5"
memory_interconnect,saturation,"CPC counters","stall cycles"
memory_interconnect,errors,"CPC counters","available error counters"
io_interconnect,utilization,"CPC counters","throughput vs max"
io_interconnect,utilization,"iostat / ip","inferred interconnect usage"
io_interconnect,saturation,"CPC counters","stall cycles"
io_interconnect,errors,"CPC counters","available error counters"