Provided by: dstat_0.7.4-6.1_all bug


       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 information.


       -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)

           enable aio stats (asynchronous I/O)

           enable advanced cpu stats

           enable only cpu usage stats

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

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

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

           enable advanced memory stats

           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, 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 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 bits for values expressed in bytes

           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

           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)

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

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

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

           number of transfers per second that were issued to the device

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

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

           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 innodb 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 extended NFS v4 server operations

           show NFS v4 stats

           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)

       --redis: show redis stats

           show RPC client calls stats

           show RPC server calls stats

           show sendmail queue size (needs sendmail)

           show CPU stats using SNMP from DSTAT_SNMPSERVER

           show load stats using SNMP from DSTAT_SNMPSERVER

           show memory stats using SNMP from DSTAT_SNMPSERVER

           show network stats using SNMP from DSTAT_SNMPSERVER

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

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

           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 CPU stats from hypervisor

           show VMware memory stats from hypervisor

           show advanced VMware memory stats from hypervisor

           show VMware ESX kernel vmhba stats

           show VMware ESX kernel interrupt stats

           show VMware ESX kernel port stats

           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

           show ZFS arc stats

           show ZFS l2arc stats

           show ZFS zil stats


       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

           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


       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]

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


       Paths that may contain external dstat_*.py plugins:

           (path of binary)/plugins/


       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.







   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)


       Written by Dag Wieers[1]

       Homepage at

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


       Dag Wieers <>




  0.7.3                                    August 2014                                   DSTAT(1)