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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

-C 0,3,total

include cpu0, cpu3 and total

-d, --disk

enable disk stats

-D total,hda

include hda and total

-g, --page

enable page stats

-i, --int

enable interrupt stats

-I 5,10

include interrupt 5 and 10

-l, --load

enable load stats

-m, --mem

enable memory stats

-n, --net

enable network stats

-N eth1,total

include eth1 and total

-p, --proc

enable process stats

-s, --swap

enable swap stats

-S swap1,total

include swap1 and total

-t, --time

enable time/date output

-T, --epoch

enable time counter (seconds since epoch)

-y, --sys

enable system stats

--ipc

enable ipc stats

--lock

enable lock stats

--raw

enable raw stats

--tcp

enable tcp stats

--udp

enable udp stats

--unix

enable unix stats

-M stat1,stat2

enable internal stats and external plugin stats

Possible internal stats are

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

Possible external plugin stats can be listed using

dstat -M list

-a, --all

equals -cdngy (default)

-f, --full

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

-v, --vmstat

equals -pmgdsc -D total

--integer

show integer values

--nocolor

disable colors (implies --noupdate)

--noheaders

disable repetitive headers

--noupdate

disable intermediate updates when delay > 1

--output file

write CSV output to file

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.

USAGE

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's impact on dstat:

 dstat -taf --debug
 

Using the external app plugin together with time and normal system resources:

 dstat -tcndylp -M app
 

This is identical to:

 dstat -M time,cpu,net,disk,sys,load,proc,app
 

BUGS

Since it's 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]dag@wieers.com

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

FILES

Paths that may contain external dstat_* 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, 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

 proc(5)
 

AUTHOR

Written by Dag Wieers [1]dag@wieers.com

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

This manpage was initially written by Andrew Pollock [3]apollock@debian.org for the Debian GNU/Linux system, and updated by Dag Wieers [1]dag@wieers.com

REFERENCES

1. dag@wieers.com

mailto:dag@wieers.com

2. http://dag.wieers.com/home-made/dstat/

http://dag.wieers.com/home-made/dstat/

3. apollock@debian.org

mailto:apollock@debian.org