Linux Performance Monitoring

Notes from the Linux Performance Monitoring talk at Velocity 2015 - Part 1, Part 2

USE

atop (atop uses the linux kernel event interface rather than sampling on screen updates, so it is better for viewing systems affected by short-lived processes)
htop
vmstat -Sm 1
iostat -xmdz 1
mpstat -P ALL 1
free -m
sar -n DEV 1
strace -tttT # very disruptive of system performance, slows system significantly
tcpdump
pidstat -t 1
pidstat -d
swapon -s
lsof
sar -n TCP,ETCP,DEV 1
collectl
dstat
strace 2>&1 | head -n 100 # since there's no strace -c N
ss
iptraf
slabtop
pcstat
perf
tiptop
rdmsr
perf-tools/execsnoop