200.1 Measure and Troubleshoot Resource Usage
Alfredo Braga • October 22, 2021
Measure CPU usage
Measure memory usage
Measure disk I/O
Measure network I/O
Measure firewalling and routing throughput
Map client bandwidth usage
Match / correlate system symptoms with likely problems
Estimate throughput and identify bottlenecks in a system including networking
iostat
netstat
w
top
sar
processes blocked on I/O
blocks out
vmstat
Exibe informaçõs sobre processos, memoria, paginação, block IO, disco e atividade de CPU
vmstat <delay> <repetições>
vmstat 2
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
1 0 571136 1108860 1113588 8319352 0 0 14 22 1 3 1 1 98 0 0
0 1 571136 1125264 1113696 8317868 0 0 0 868 1938 6617 4 2 94 0 0
0 0 571136 1127784 1113844 8313972 0 0 0 642 1323 4547 2 1 97 0 0
1 0 571136 1124760 1114016 8311144 0 0 0 792 1382 4764 2 1 97 0 0
1 0 571136 1145364 1114260 8301892 0 0 2 7350 1566 5180 4 1 95 0 0
0 0 571136 1162500 1114472 8290384 0 0 10 5944 1423 4845 3 1 96 0 0
2 0 571136 1160232 1114612 8291476 0 0 0 586 1119 3626 2 0 98 0 0
0 0 571136 1148940 1114728 8290512 0 0 0 308 1157 3413 2 1 98 0 0
1 0 571136 1147844 1114856 8290764 0 0 0 700 1112 3754 2 1 97 0 0