DSTAT(1)							      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, 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]dag@wieers.com


       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]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.


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



  0.7.0				  06/15/2010			      DSTAT(1)