dstat

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), 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