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= dstat(1)
Dag Wieers <>
v0.7.0, November 2009
dstat - versatile tool for generating system resource statistics
dstat [-afv] [options..] [delay [count]]
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.
Users of Sleuthkit might find Sleuthkit's dstat being renamed to
datastat to avoid a name conflict. See Debian bug #283709 for more
-c, --cpu::
enable cpu stats (system, user, idle, wait, hardware interrupt, software
-C 0,3,total::
include cpu0, cpu3 and total (when using -c/--cpu); use 'all' to show all
-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)
enable aio stats (asynchronous I/O)
enable filesystem stats (open files, inodes)
enable ipc stats (message queue, semaphores, shared memory)
enable file lock stats (posix, flock, read, write)
enable raw stats (raw sockets)
enable socket stats (total, tcp, udp, raw, ip-fragments)
enable tcp stats (listen, established, syn, time_wait, close)
enable udp stats (listen, active)
enable unix stats (datagram, stream, listen, active)
enable vm stats (hard pagefaults, soft pagefaults, allocated, free)
enable advance vm stats (steal, scanK, scanD, pgoru, astll)
enable zoneinfo stats (d32F, d32H, normF, normH)
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 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
force float values on screen (mutual exclusive with *--integer*)
force integer values on screen (mutual exclusive with *--float*)
--bw, --blackonwhite::
change colors for white background terminal
disable colors (implies *--noupdate*)
disable repetitive headers
disable intermediate updates when delay > 1
--output file::
write CSV output to file
show profiling statistics when exiting dstat
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 in percentage (needs ACPI)
battery remaining in hours, minutes (needs ACPI)
CPU frequency in percentage (needs ACPI)
number of dbus connections (needs python-dbus)
per disk transactions per second (tps) stats
per disk utilization in percentage
show dstat cputime consumption and latency
show dstat advanced cpu usage
show dstat context switches
show dstat advanced memory usage
fan speed (needs ACPI)
per filesystem disk usage
GPFS read/write I/O (needs mmpmon)
GPFS filesystem operations (needs mmpmon)
Hello world example dstat plugin
show innodb buffer stats
show innodb I/O stats
show innodb operations counters
show lustre I/O throughput
show software raid (md) progress and speed
show the number of hits and misses from memcache
show the MySQL5 command stats
show the MySQL5 connection stats
show the MySQL5 I/O stats
show the MySQL5 keys stats
show the MySQL I/O stats
show the MySQL keys stats
show the number of packets received and transmitted
show NFS v3 client operations
show extended NFS v3 client operations
show NFS v3 server operations
show extended NFS v3 server operations
show NTP time from an NTP server
show postfix queue sizes (needs postfix)
show power usage
show total number of processes
show qmail queue sizes (needs qmail)
show RPC client calls stats
show RPC server calls stats
show sendmail queue size (needs sendmail)
show number of ticks per second
show squid usage statistics
show test plugin output
system temperature sensors
show most expensive block I/O process
show most expensive block I/O process (incl. pid and other stats)
show process waiting for child the most
show most expensive CPU process
show most expensive CPU process (incl. pid and other stats)
show process using the most CPU time (in ms)
show process with the highest average timeslice (in ms)
show most frequent interrupt
show most expensive I/O process
show most expensive I/O process (incl. pid and other stats)
show process with highest total latency (in ms)
show process with the highest average latency (in ms)
show process using the most memory
show process that will be killed by OOM the first
show number of utmp connections (needs python-utmp)
show VMware ESX kernel vmhba stats
show VMware ESX kernel interrupt stats
show VMware ESX kernel port stats
show ballooning status inside VMware guests
show CPU usage per OpenVZ guest
show I/O usage per OpenVZ guest
show OpenVZ user beancounters
wireless link quality and signal to noise ratio
*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)
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.
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
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:[]
Please see the TODO file for known bugs and future plans.
Paths that may contain external dstat_*.py plugins:
(path of binary)/plugins/
=== Performance tools
ifstat(1), iftop(8), iostat(1), mpstat(1), netstat(1), nfsstat(1), nstat(8), powertop(1), vmstat(1), xosview(1)
=== Debugging tools
htop(1), lslk(1), lsof(8), top(1)
=== Process tracing
ltrace(1), pidstat(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
acct(2), dump-acct(8), dump-utmp(8), lastcomm(1), 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)
Written by Dag Wieers[]
Homepage at[]
This manpage was initially written by Andrew Pollock[] for the Debian GNU/Linux system.
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