Provided by: dstat_0.7.3-1.1_all bug

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

  0.7.3                                    August 2014                                   DSTAT(1)