DSTAT(1)

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), for more CPU related stats also see --cpu-adv and --cpu-use

-C 0,3,total
    include cpu0, cpu3 and total (when using -c/--cpu); use all to show all CPUs

-d, --disk
    enable disk stats (read, write), for more disk related stats look into the other --disk plugins

-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); for more memory related stats also try --mem-adv and --swap

-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)

--cpu-adv
    enable advanced cpu stats

--cpu-use
    enable only cpu usage stats

--fs, --filesystem
    enable filesystem stats (open files, inodes)

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

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

--mem-adv
    enable advanced memory stats

--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)

--vm-adv
    enable advance vm stats (steal, scanK, scanD, pgoru, astll)

--zones
    enable zoneinfo stats (d32F, d32H, normF, normH)

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

Possible internal stats are
    aio, cpu, cpu24, cpu-adv, cpu-use, disk, disk24, disk24-old, epoch, fs, int, int24, io, ipc, load, lock, mem, mem-adv, net, page, page24, proc, raw, socket, swap, swap-old, sys, tcp, time, udp, unix, vm, vm-adv, zones

--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

--bits
    force bits for values expressed in bytes

--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

--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-avgqu
    average queue length of the requests that were issued to the device

--disk-avgrq
    average size (in sectors) of the requests that were issued to the device

--disk-svctm
    average service time (in milliseconds) for I/O requests that were issued to the device

--disk-tps
    number of transfers per second that were issued to the device

--disk-util
    percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device)

--disk-wait
    average time (in milliseconds) for I/O requests issued to the device to be served

--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

--md-status
    show software raid (md) progress and speed

--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-innodb
    show the MySQL5 innodb 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

--nfsd4-ops
    show extended NFS v4 server operations

--nfsstat4
    show NFS v4 stats

--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)

--redis: show redis stats

--rpc
    show RPC client calls stats

--rpcd
    show RPC server calls stats

--sendmail
    show sendmail queue size (needs sendmail)

--snmp-cpu
    show CPU stats using SNMP from DSTAT_SNMPSERVER

--snmp-load
    show load stats using SNMP from DSTAT_SNMPSERVER

--snmp-mem
    show memory stats using SNMP from DSTAT_SNMPSERVER

--snmp-net
    show network stats using SNMP from DSTAT_SNMPSERVER

--snmp-net-err: show network errors using SNMP from DSTAT_SNMPSERVER

--snmp-sys
    show system stats (interrupts and context switches) using SNMP from DSTAT_SNMPSERVER

--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)

--vm-cpu
    show VMware CPU stats from hypervisor

--vm-mem
    show VMware memory stats from hypervisor

--vm-mem-adv
    show advanced VMware memory stats from hypervisor

--vmk-hba
    show VMware ESX kernel vmhba stats

--vmk-int
    show VMware ESX kernel interrupt stats

--vmk-nic
    show VMware ESX kernel port stats

--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

--zfs-arc
    show ZFS arc stats

--zfs-l2arc
    show ZFS l2arc stats

--zfs-zil
    show ZFS zil stats

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 advanced cpu stats with interrupts per device:

    dstat -t --cpu-adv -yif

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: dag@wieers.com[1]

    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/

ENVIRONMENT VARIABLES

Dstat will read additional command line arguments from the environment variable DSTAT_OPTS. You can use this to configure Dstat’s default behavior, e.g. if you have a black-on-white terminal:

    export DSTAT_OPTS="--bw --noupdate"

Other internal or external plugins have their own environment variables to influence their behavior, e.g.

    DSTAT_NTPSERVER

    DSTAT_MYSQL
    DSTAT_MYSQL_HOST
    DSTAT_MYSQL_PORT
    DSTAT_MYSQL_SOCKET
    DSTAT_MYSQL_USER
    DSTAT_MYSQL_PWD

    DSTAT_SNMPSERVER
    DSTAT_SNMPCOMMUNITY

    DSTAT_SQUID_OPTS

    DSTAT_TIMEFMT

SEE ALSO

  Performance tools

    htop(1), ifstat(1), iftop(8), iostat(1), mpstat(1), netstat(8), nfsstat(8), perf(1), powertop(1), rtacct(8), top(1), vmstat(8), xosview(1)

  Process tracing

    lslk(8), lsof(8), 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, ps_mem(1), slabtop(1), smem(8)

  Accounting tools

    acct(2), dump-acct(8), dump-utmp(8), lastcomm(1), sa(8)

  Hardware debugging tools

    dmidecode(8), ifinfo(1), lsdev(1), lshal(1), lshw(1), lsmod(8), lspci(8), lsusb(8), numactl(8), smartctl(8), turbostat(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 dag@wieers.com[1]

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

This manpage was initially written by Andrew Pollock apollock@debian.org[2] for the Debian GNU/Linux system.

AUTHOR

Dag Wieers <dag@wieers.com>
    Author.

NOTES

1.  dag@wieers.com
    mailto:dag@wieers.com

2.  apollock@debian.org
    mailto:apollock@debian.org