Difference between revisions of "Performance monitoring"
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Either ''dstat'' or ''collectl'' - Powerful and feature rich command line utilities that monitors CPU, memory, disk and network | Either ''dstat'' or ''collectl'' - Powerful and feature rich command line utilities that monitors CPU, memory, disk and network | ||
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htop - Advanced interactive process monitoring tool | htop - Advanced interactive process monitoring tool | ||
Revision as of 03:33, 21 June 2020
Either dstat or collectl - Powerful and feature rich command line utilities that monitors CPU, memory, disk and network
htop - Advanced interactive process monitoring tool
# htop
iotop - Display real time Disk I/O and process
# iotop
iostat - Display statistics of CPU, disk I/O and NFS
# iostat -m -n -N -x 1
iftop - Real time network bandwidth monitoring tool
# iftop
Also check nload, trafshow, iptraf, pftop
vmstat - Display statistics of virtual memory, kernel, disks, process, I/O blocks and CPU activity
# vmstat # vmstat -s (other visualization) # vmstat -S m (show MB instead of KB)
lsof - List open files and sockets/pipes as well
# lsof
tcpdump - Network packet capture (Sniffer)
# tcpdump -n -i eth0 net 10.1.1.0/24 and host 10.2.2.2 and port 80 # tcpdump -n -i eth0 'host 10.1.1.1 and (port 80 or 443)' # tcpdump -w - | tee capture.pcap | tcpdump -r - (write to file and standard output the same time)
Additional tools: iperf for traffic generation, and apache mod_status