DSTAT

 

NAME

dstat – versatile tool for generating system resource statistics  

SYNOPSIS

dstat [-afv] [options..] [delay [count]]

 

DESCRIPTION

Dstat is a versatile replacement for vmstat, iostat and ifstat. Dstat overcomes some of the limitations and adds some extra features.

Dstat allows you to view all of your system resources instantly, you can eg. compare disk usage in combination with interrupts from your IDE controller, or compare the network bandwidth numbers directly with the disk throughput (in the same interval).

Dstat also cleverly gives you the most detailed information in columns and clearly indicates in what magnitude and unit the output is displayed. Less confusion, less mistakes, more efficient.

Dstat is unique in letting you aggregate block device throughput for a certain diskset or network bandwidth for a group of interfaces, ie. you can see the throughput for all the block devices that make up a single filesystem or storage system.

Dstat allows its data to be directly written to a CSV file to be imported and used by OpenOffice, Gnumeric or Excel to create graphs.

Note Users of Sleuthkit might find Sleuthkit’s dstat being renamed to datastat to avoid a name conflict. See Debian bug #283709 for more information.

 

OPTIONS

-c, –cpu

enable cpu stats (system, user, idle, wait, hardware interrupt, software interrupt)

-C 0,3,total

include cpu0, cpu3 and total (when using -c/–cpu)

-d, –disk

enable disk stats (read, write)

-D total,hda

include total and hda (when using -d/–disk)

-g, –page

enable page stats (page in, page out)

-i, –int

enable interrupt stats

-I 5,10

include interrupt 5 and 10 (when using -i/–int)

-l, –load

enable load average stats (1 min, 5 mins, 15mins)

-m, –mem

enable memory stats (used, buffers, cache, free)

-n, –net

enable network stats (receive, send)

-N eth1,total

include eth1 and total (when using -n/–net)

-p, –proc

enable process stats (runnable, uninterruptible, new)

-r, –io

enable I/O request stats (read, write requests)

-s, –swap

enable swap stats (used, free)

-S swap1,total

include swap1 and total (when using -s/–swap)

-t, –time

enable time/date output

-T, –epoch

enable time counter (seconds since epoch)

-y, –sys

enable system stats (interrupts, context switches)

–aio

enable aio stats (asynchronous I/O)

–fs

enable filesystem stats (open files, inodes)

–ipc

enable ipc stats (message queue, semaphores, shared memory)

–lock

enable file lock stats (posix, flock, read, write)

–raw

enable raw stats (raw sockets)

–socket

enable socket stats (total, tcp, udp, raw, ip-fragments)

–tcp

enable tcp stats (listen, established, syn, time_wait, close)

–udp

enable udp stats (listen, active)

–unix

enable unix stats (datagram, stream, listen, active)

–vm

enable vm stats (hard pagefaults, soft pagefaults, allocated, free)

–plugin-name

enable (external) plugins by plugin name, see PLUGINS for options

Possible internal stats are

aio, cpu, cpu24, disk, disk24, disk24old, epoch, fs, int, int24, io, ipc, load, lock, mem, net, page, page24, proc, raw, socket, swap, swapold, sys, tcp, time, udp, unix, vm

–list

list the internal and external plugin names

-a, –all

equals -cdngy (default)

-f, –full

expand -C, -D, -I, -N and -S discovery lists

-v, –vmstat

equals -pmgdsc -D total

–float

force float values on screen (mutual exclusive with –integer)

–integer

force integer values on screen (mutual exclusive with –float)

–bw, –blackonwhite

change colors for white background terminal

–nocolor

disable colors (implies –noupdate)

–noheaders

disable repetitive headers

–noupdate

disable intermediate updates when delay > 1

–output file

write CSV output to file

–profile

show profiling statistics when exiting dstat

 

PLUGINS

While anyone can create their own dstat plugins (and contribute them) dstat ships with a number of plugins already that extend its capabilities greatly. Here is an overview of the plugins dstat ships with:

–battery

battery in percentage (needs ACPI)

–battery-remain

battery remaining in hours, minutes (needs ACPI)

–cpufreq

CPU frequency in percentage (needs ACPI)

–dbus

number of dbus connections (needs python-dbus)

–disk-tps

per disk transactions per second (tps) stats

–disk-util

per disk utilization in percentage

–dstat

show dstat cputime consumption and latency

–dstat-cpu

show dstat advanced cpu usage

–dstat-ctxt

show dstat context switches

–dstat-mem

show dstat advanced memory usage

–fan

fan speed (needs ACPI)

–freespace

per filesystem disk usage

–gpfs

GPFS read/write I/O (needs mmpmon)

–gpfs-ops

GPFS filesystem operations (needs mmpmon)

–helloworld

Hello world example dstat plugin

–innodb-buffer

show innodb buffer stats

–innodb-io

show innodb I/O stats

–innodb-ops

show innodb operations counters

–lustre

show lustre I/O throughput

–memcache-hits

show the number of hits and misses from memcache

–mysql5-cmds

show the MySQL5 command stats

–mysql5-conn

show the MySQL5 connection stats

–mysql5-io

show the MySQL5 I/O stats

–mysql5-keys

show the MySQL5 keys stats

–mysql-io

show the MySQL I/O stats

–mysql-keys

show the MySQL keys stats

–net-packets

show the number of packets received and transmitted

–nfs3

show NFS v3 client operations

–nfs3-ops

show extended NFS v3 client operations

–nfsd3

show NFS v3 server operations

–nfsd3-ops

show extended NFS v3 server operations

–ntp

show NTP time from an NTP server

–postfix

show postfix queue sizes (needs postfix)

–power

show power usage

–proc-count

show total number of processes

–qmail

show qmail queue sizes (needs qmail)

–rpc

show RPC client calls stats

–rpcd

show RPC server calls stats

–sendmail

show sendmail queue size (needs sendmail)

–snooze

show number of ticks per second

–squid

show squid usage statistics

–test

show test plugin output

–thermal

system temperature sensors

–top-bio

show most expensive block I/O process

–top-bio-adv

show most expensive block I/O process (incl. pid and other stats)

–top-childwait

show process waiting for child the most

–top-cpu

show most expensive CPU process

–top-cpu-adv

show most expensive CPU process (incl. pid and other stats)

–top-cputime

show process using the most CPU time (in ms)

–top-cputime-avg

show process with the highest average timeslice (in ms)

–top-int

show most frequent interrupt

–top-io

show most expensive I/O process

–top-io-adv

show most expensive I/O process (incl. pid and other stats)

–top-latency

show process with highest total latency (in ms)

–top-latency-avg

show process with the highest average latency (in ms)

–top-mem

show process using the most memory

–top-oom

show process that will be killed by OOM the first

–utmp

show number of utmp connections (needs python-utmp)

–vmk-hba

show VMware ESX kernel vmhba stats

–vmk-int

show VMware ESX kernel interrupt stats

–vmk-nic

show VMware ESX kernel port stats

–vm-memctl

show ballooning status inside VMware guests

–vz-cpu

show CPU usage per OpenVZ guest

–vz-io

show I/O usage per OpenVZ guest

–vz-ubc

show OpenVZ user beancounters

–wifi

wireless link quality and signal to noise ratio

 

ARGUMENTS

delay is the delay in seconds between each update

count is the number of updates to display before exiting

The default delay is 1 and count is unspecified (unlimited)

 

INTERMEDIATE UPDATES

When invoking dstat with a delay greater than 1 and without the –noupdate option, it will show intermediate updates, ie. the first time a 1 sec average, the second update a 2 second average, etc. until the delay has been reached.

So in case you specified a delay of 10, the 9 intermediate updates are NOT snapshots, they are averages over the time that passed since the last final update. The end result is that you get a 10 second average on a new line, just like with vmstat.

 

EXAMPLES

Using dstat to relate disk-throughput with network-usage (eth0), total CPU-usage and system counters:

dstat -dnyc -N eth0 -C total -f 5

Checking dstat’s behaviour and the system impact of dstat:

dstat -taf –debug

Using the time plugin together with cpu, net, disk, system, load, proc and top_cpu plugins:

dstat -tcndylp –top-cpu

this is identical to

dstat –time –cpu –net –disk –sys –load –proc –top-cpu

Using dstat to relate cpu stats with interrupts per device:

dstat -tcyif

 

BUGS

Since it is practically impossible to test dstat on every possible permutation of kernel, python or distribution version, I need your help and your feedback to fix the remaining problems. If you have improvements or bugreports, please send them to: [1][email protected]

Note Please see the TODO file for known bugs and future plans.

 

FILES

Paths that may contain external dstat_*.py plugins:

~/.dstat/
(path of binary)/plugins/
/usr/share/dstat/
/usr/local/share/dstat/

 

SEE ALSO

 

Performance tools

ifstat(1), iftop(8), iostat(1), mpstat(1), netstat(1), nfsstat(1), nstat, vmstat(1), xosview(1)

 

Debugging tools

htop(1), lslk(1), lsof(8), top(1)

 

Process tracing

ltrace(1), pmap(1), ps(1), pstack(1), strace(1)

 

Binary debugging

ldd(1), file(1), nm(1), objdump(1), readelf(1)

 

Memory usage tools

free(1), memusage, memusagestat, slabtop(1)

 

Accounting tools

dump-acct, dump-utmp, sa(8)

 

Hardware debugging tools

dmidecode, ifinfo(1), lsdev(1), lshal(1), lshw(1), lsmod(8), lspci(8), lsusb(8), smartctl(8), x86info(1)

 

Application debugging

mailstats(8), qshape(1)

 

Xorg related tools

xdpyinfo(1), xrestop(1)

 

Other useful info

collectl(1), proc(5), procinfo(8)

 

AUTHOR

Written by Dag Wieers [1][email protected]

Homepage at [2]http://dag.wieers.com/home-made/dstat/

This manpage was initially written by Andrew Pollock [3][email protected] for the Debian GNU/Linux system.