====== vmstat コマンド ======

===== インストール =====
<code>
# opkg update && opkg install procps-ng-vmstat
</code>
<WRAP prewrap 100% #result_long>
<code>
Downloading https://fw.gl-inet.com/releases/kmod-3.2/ar71xx/nand/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_core
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/sync_kmod-3.2/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_sync
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/base/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_base
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/gli_pub/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_gli_pub
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_packages
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_luci
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/routing/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_routing
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/telephony/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_telephony
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/glinet/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_glinet
ifstat - 1.1-1 - ifstat is a tool to report network interfaces bandwidth just like vmstat/iostat do for other system counters. It can monitor local interfaces by polling the kernel counters, or remote hosts interfaces using SNMP.
procps-ng-vmstat - 3.3.11-4 - Installs the applet vmstat.
root@TomoyanWRT-GL:~# opkg update && opkg install procps-ng-vmstat
Downloading https://fw.gl-inet.com/releases/kmod-3.2/ar71xx/nand/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_core
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/sync_kmod-3.2/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_sync
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/base/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_base
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/gli_pub/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_gli_pub
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_packages
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_luci
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/routing/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_routing
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/telephony/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_telephony
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/glinet/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_glinet
Installing procps-ng-vmstat (3.3.11-4) to root...
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/packages/procps-ng-vmstat_3.3.11-4_mips_24kc.ipk
Installing terminfo (6.1-1) to root...
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/base/terminfo_6.1-1_mips_24kc.ipk
Installing libncurses (6.1-1) to root...
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/base/libncurses_6.1-1_mips_24kc.ipk
Installing procps-ng (3.3.11-4) to root...
Downloading https://fw.gl-inet.com/releases/packages-3.x/ar71xx/packages/procps-ng_3.3.11-4_mips_24kc.ipk
Configuring terminfo.
Configuring libncurses.
Configuring procps-ng.
Configuring procps-ng-vmstat.
</code>
</WRAP>

===== 動作確認 =====
<code>
# vmstat --help
</code>
<WRAP prewrap 100% #result>
<code>
Usage:
 vmstat [options] [delay [count]]

Options:
 -a, --active           active/inactive memory
 -f, --forks            number of forks since boot
 -m, --slabs            slabinfo
 -n, --one-header       do not redisplay header
 -s, --stats            event counter statistics
 -d, --disk             disk statistics
 -D, --disk-sum         summarize disk statistics
 -p, --partition <dev>  partition specific statistics
 -S, --unit <char>      define display unit
 -w, --wide             wide output
 -t, --timestamp        show timestamp

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see vmstat(8).
</code>
</WRAP>

===== 実行例 =====
<code>
# vmstat 1
</code>
<WRAP prewrap 100% #result>
<code>
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 0  0      0  21728   5404  58020    0    0     0     0    7   21  9 20 70  1  0
 0  0      0  21476   5404  58276    0    0     0     0  589  431  3  7 90  0  0
 0  0      0  21188   5404  58468    0    0     0     0  494  402  3 13 83  1  0
</code>
</WRAP>

===== 参考文献 =====
[[https://qiita.com/kunihirotanaka/items/21194f77713aa0663e3b|LinuxのI/OやCPUの負荷とロードアベレージの関係を詳しく見てみる - Qiita]]\\