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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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PCP-DSTAT(1) General Commands Manual PCP-DSTAT(1)
pcp-dstat - versatile tool for generating system resource
statistics
pcp [pcp options] dstat [-acdfghilmnpqrstvVy?] [-C cpus] [-D
disks] [-L DM devices] [-M MD devices] [-P partitions] [-I
interrupts] [-N interfaces] [-o output-file] [-S swap-devices]
[--bits] [--bw] [--color] [--float] [--integer] [--nocolor]
[--noheaders] [--nomissed] [--noupdate] [--list] [--pidfile pid-
file] [--plugin] [--all-plugins] [delay [count]]
pcp-dstat is a general performance analysis tool allowing you to
view multiple system resources instantly, for example you can
compare disk usage in combination with interrupts from a disk
controller, or compare the network bandwidth numbers directly
with the disk throughput (in the same interval).
It also cleverly gives you the most detailed information in
columns and clearly indicates in what magnitude and unit the
output is being displayed. Less confusion, fewer mistakes, more
efficient.
The delay is the delay in seconds between each update, and the
count is the number of updates to display before exiting. The
default delay is 1 second and count is unspecified (run until
interrupted or end of archive is reached).
This latest generation of Dstat, pcp-dstat, allows for analysis
of historical performance data (in the PCP archive format created
by pmlogger(1)), as well as distributed systems analysis of live
performance data from remote hosts running the pmcd(1) process.
The original Dstat notion of ``plugins'' is replaced by use of
named metrics in a Performance Metric Name Space (PMNS(5))
supplied by Performance Metric Domain Agents (PMDAs). Metrics
and other formatting information is now specified as plugin
configuration files in pcp-dstat(5) format. This new style of
plugin is either built-in (time-related reporting only), or
sourced from the system-wide location ($PCP_SYSCONF_DIR/dstat)
and/or sourced from an individual users set of personal plugins
($HOME/.pcp/dstat).
The list of all available plugins can be seen using the --list
dstat command line option.
When invoked via the pcp(1) command, the -h/--host, -a/--archive,
-O/--origin, -Z/--timezone and several other pcp options become
indirectly available; refer to PCPIntro(1) for a complete
description of these options.
The additional command line options available for pcp-dstat are:
--list list all available plugin names
--plugin-name
enable any plugin by name
-a, --all
equals -cdngy (default plugin set)
-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 or --disk-tps
plugin)
--dm, --device-mapper
enable device mapper stats (read, write); for more device-
mapper related stats look into the other --dm plugins
--L total,root,home
include total, root and home (when using --dm/--device-
mapper or --dm-tps plugin)
--md, --multi-device
enable multi-device driver stats (read, write); for more
multi-device driver related stats look into the other --md
plugins
--M total,md-0
include total and md-0 (when using --md/--multi-device or
--md-tps plugin)
--part, --partition
enable disk partition stats (read, write); for more
partition related stats look into the other --part plugins
--P total,sda2
include total and sda2 (when using --part/--partition or
--part-tps plugin)
-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, 15 mins)
-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)
--net-packets
show the number of packets received and transmitted
-p, --proc
enable process stats (runnable, uninterruptible, new)
--proc-count
show total number of processes
-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)
--snooze show time spent between updates in seconds
-t, --time
enable time/date output (try --time-adv for millisecond
precision)
-T, --epoch
enable time counter (seconds since epoch, or millisecond
precision from the --epoch-adv plugin)
-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
--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
--fs, --filesystem
enable filesystem stats (open files, inodes)
--freespace
per filesystem used and available space
--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)
--utmp shows login information from utmp(5)
--vm enable virtual memory stats (hard pagefaults, soft
pagefaults, allocated, free)
--vm-adv
enable advance virtual memory stats (steal, scanK, scanD,
pgoru, astll)
--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
--rpc show remote procedure call (RPC) client calls stats
--rpcd show remote procedure call (RPC) server calls stats
--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 milliseconds)
--top-cputime-avg
show process with the highest average timeslice (in
milliseconds)
--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 milliseconds)
--top-latency-avg
show process with the highest average latency (in
milliseconds)
--top-mem
show process using the most memory
--top-oom
show process that will be killed by the out-of-memory
(OOM) killer the first
-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 (mutually exclusive with
--integer)
--integer
force integer values on screen (mutually exclusive with
--float)
--bw, --blackonwhite
change colors for white background terminal
--nocolor
disable colors
--noheaders
disable repetitive headers
--nomissed
disable missed ticks warnings for intermediate samples.
--noupdate
disable intermediate updates when delay greater than 1.
-o file, --output=file
write CSV (Comma-Separated Value) format output to a file.
-p file, --pidfile=file
write the process identifier to a given file.
Some pcp-dstat configuration files require the installation of
optional Performance Metric Domain Agents, above and beyond the
default installed set.
--battery
remaining battery charge in percentage (needs the Denki
PMDA)
--gpfs
GPFS read/write I/O (needs the GPFS PMDA)
--gpfs-ops
GPFS filesystem operations (needs the GPFS PMDA)
--innodb-buffer
show innodb buffer stats (needs the MySQL PMDA)
--innodb-io
show innodb I/O stats (needs the MySQL PMDA)
--innodb-ops
show innodb operations counters (needs the MySQL PMDA)
--lustre
show lustre I/O throughput (needs the Lustre PMDA)
--memcache-hits
show the number of hits and misses from memcache (needs the
Memcached PMDA)
--mysql5-cmds
show the MySQL5 command stats (needs the MySQL PMDA)
--mysql5-conn
show the MySQL5 connection stats (needs the MySQL PMDA)
--mysql5-innodb
show the MySQL5 innodb stats (needs the MySQL PMDA)
--mysql5-io
show the MySQL5 I/O stats (needs the MySQL PMDA)
--mysql5-keys
show the MySQL5 keys stats (needs the MySQL PMDA)
--mysql-io
show the MySQL I/O stats (needs the MySQL PMDA)
--mysql-keys
show the MySQL keys stats (needs the MySQL PMDA)
--postfix
show postfix queue sizes (needs the Postfix PMDA)
--redis
show Redis stats (needs the Redis PMDA)
--sendmail
show sendmail queue size (needs the Sendmail PMDA)
--zfs-arc
show ZFS arc stats (needs the ZFS PMDA)
--zfs-l2arc
show ZFS l2arc stats (needs the ZFS PMDA)
--zfs-zil
show ZFS zil stats (needs the ZFS PMDA)
Anyone can create additional, custom pcp-dstat plugin
configuration files, for any metrics - the list of available
metrics can be produced by either the pminfo(1) or pmprobe(1)
command.
The following do not yet have metrics backing them, but have been
included from the original Dstat utility. Please contact
<[email protected]> if you need or implement any of these, and we'll
work with you to get them included.
--battery-remain
battery remaining in hours, minutes (needs an ACPI PMDA)
--cpufreq
CPU frequency in percentage (needs an ACPI PMDA)
--dbus number of dbus connections (needs a python-dbus PMDA)
--fan fan speed (needs an ACPI PMDA)
--md-status
show software raid (MD driver) progress and speed (needs
new disk.md metrics)
--power
show power usage (needs an ACPI PMDA)
--qmail
show qmail queue sizes (needs qmail)
--squid
show squid usage statistics (needs a Squid PMDA)
--thermal
system temperature sensors (needs an ACPI PMDA)
--vm-cpu
show VMware CPU stats from hypervisor (needs a VMware
PMDA)
--vm-mem
show VMware memory stats from hypervisor (needs a VMware
PMDA)
--vm-mem-adv
show advanced VMware memory stats from hypervisor (needs a
VMware PMDA)
--vmk-hba
show VMware ESX kernel vmhba stats (needs a VMware PMDA)
--vmk-int
show VMware ESX kernel interrupt stats (needs a VMware
PMDA)
--vmk-nic
show VMware ESX kernel port stats (needs a VMware PMDA)
--vz-cpu
show CPU usage per OpenVZ guest (needs an OpenVZ PMDA)
--vz-io
show I/O usage per OpenVZ guest (needs an OpenVZ PMDA)
--vz-ubc
show OpenVZ user beancounters (needs an OpenVZ PMDA)
--wifi wireless link quality and signal to noise ratio (needs
Linux PMDA metrics)
When invoking pcp-dstat with a delay greater than 1 second and
without the --noupdate option, it will show intermediate updates,
i.e., the first time a 1 second 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(1).
Using pcp-dstat to relate disk-throughput with network-usage
(eth0), total CPU-usage and system counters:
$ pcp dstat -dnyc -N eth0 -C total -f 5
Using the time plugin together with cpu, net, disk, system, load
and proc plugins:
$ pcp dstat -tcndylp
This is identical to:
$ pcp dstat --time --cpu --net --disk --sys --load --proc
Using pcp-dstat to report 10 samples from metrics recorded in a
PCP archive 20180729 from 2:30 AM:
$ pcp --origin '@02:30' -a 20180729 dstat --time --cpu-adv --sys 1 10
Examine the same metrics live from a remote host:
$ pcp --host www.acme.com dstat --time --cpu-adv --sys 1 10
$HOME/.pcp/dstat/
private per-user configuration files
$PCP_SYSCONF_DIR/dstat/
system-wide configuration files
Internal plugins behaviour can be changed through environment
variables.
DSTAT_TIMEFMT
strftime(3) format string for reporting time (see --time)
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values
for these variables. The $PCP_CONF variable may be used to
specify an alternative configuration file, as described in
pcp.conf(5).
For environment variables affecting PCP tools, see
pmGetOptions(3).
The Dstat utility was initially written by Dag Wieers
<[email protected]>.
The Dstat homepage is at http://dag.wieers.com/home-made/dstat/ .
This manpage was initially written by Andrew Pollock
<[email protected]> for the Debian GNU/Linux system.
The pcp-dstat utility is written and maintained by the PCP
developers <[email protected]>.
The PCP homepage is at https://pcp.io/ .
PCPIntro(1), pcp(1), pmcd(1), pminfo(1), pmlogger(1), pmprobe(1),
vmstat(1), pmGetOptions(3), strftime(3), PMNS(5), pcp.conf(5),
pcp-dstat(5) and utmp(5).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to [email protected]. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-14.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
Performance Co-Pilot PCP PCP-DSTAT(1)
Pages that refer to this page: pcp-dstat(5)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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