SysStat : How to use2025/09/18 |
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How to use SysStat.
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| [1] | Display today's statistics reports. |
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# CPU root@dlp:~# sar -u Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM CPU %user %nice %system %iowait %steal %idle 11:30:07 AM all 0.00 0.00 0.00 0.01 0.00 99.99 11:40:07 AM all 0.00 0.00 0.01 0.02 0.00 99.97 11:50:01 AM all 0.00 0.00 0.00 0.01 0.00 99.99 12:00:07 PM all 0.00 0.00 0.00 0.01 0.00 99.99 ..... ..... # memory root@dlp:~# sar -r Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM kbmemfree kbavail kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty 11:30:07 AM 3557940 3667504 100780 2.51 17040 292612 35344 0.63 88472 234204 140 11:40:07 AM 3557940 3667716 100520 2.50 17156 292712 35344 0.63 88468 234356 84 11:50:01 AM 3557940 3667828 100408 2.50 17268 292712 35344 0.63 88468 234468 84 12:00:07 PM 3557940 3667948 100288 2.50 17396 292704 38352 0.68 89308 234588 92 ..... ..... # I/O root@dlp:~# sar -b Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM tps rtps wtps dtps bread/s bwrtn/s bdscd/s 11:30:07 AM 0.37 0.00 0.37 0.00 0.03 4.32 0.00 11:40:07 AM 5.12 0.01 0.30 4.81 0.31 3.01 92805.52 11:50:01 AM 0.21 0.00 0.21 0.00 0.00 2.04 0.00 12:00:07 PM 0.22 0.00 0.22 0.00 0.00 2.11 0.00 ..... ..... # network root@dlp:~# sar -n DEV Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 11:30:07 AM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11:30:07 AM enp1s0 0.63 0.01 0.03 0.00 0.00 0.00 0.00 0.00 11:40:07 AM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11:40:07 AM enp1s0 0.59 0.00 0.03 0.00 0.00 0.00 0.00 0.00 ..... ..... # load avarage root@dlp:~# sar -q Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 blocked 11:30:07 AM 0 114 0.00 0.00 0.00 0 11:40:07 AM 0 114 0.00 0.00 0.00 0 11:50:01 AM 0 113 0.00 0.00 0.00 0 12:00:07 PM 2 114 0.00 0.00 0.00 0 ..... ..... |
| [2] | Display past statistics with specifying a log file. Log files are stored under the [/var/log/sa] directory by default. |
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# display all statistics by a log file root@dlp:~# sar -A -f /var/log/sysstat/sa18 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM CPU %usr %nice %sys %iowait %steal %irq %soft %guest %gnice %idle 11:30:07 AM all 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 99.99 11:30:07 AM 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 11:30:07 AM 1 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 99.98 11:40:07 AM all 0.00 0.00 0.01 0.02 0.00 0.00 0.00 0.00 0.00 99.97 ..... ..... 11:20:07 AM %smem-10 %smem-60 %smem-300 %smem %fmem-10 %fmem-60 %fmem-300 %fmem 11:30:07 AM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11:40:07 AM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11:50:01 AM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:00:07 PM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:10:06 PM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:20:07 PM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Average: 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 # display the load average with specifying times by a log file root@dlp:~# sar -q -s 11:00:00 -e 12:00:00 -f /var/log/sysstat/sa18 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 11:14:08 AM LINUX RESTART (2 CPU) 11:20:07 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 blocked 11:30:07 AM 0 114 0.00 0.00 0.00 0 11:40:07 AM 0 114 0.00 0.00 0.00 0 11:50:01 AM 0 113 0.00 0.00 0.00 0 Average: 0 114 0.00 0.00 0.00 0 |
| [3] | Display current statistics. |
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# display CPU utilization per a second 3 times root@dlp:~# sar -u 1 3 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 12:26:51 PM CPU %user %nice %system %iowait %steal %idle 12:26:52 PM all 0.00 0.00 0.00 0.50 0.00 99.50 12:26:53 PM all 0.00 0.00 0.00 0.00 0.00 100.00 12:26:54 PM all 0.00 0.00 0.00 0.00 0.00 100.00 Average: all 0.00 0.00 0.00 0.17 0.00 99.83 # display I/O and network per 2 seconds 5 times root@dlp:~# sar -b -n DEV 2 5 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 12:27:14 PM tps rtps wtps dtps bread/s bwrtn/s bdscd/s 12:27:16 PM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:27:14 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 12:27:16 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:27:16 PM enp1s0 0.50 0.00 0.03 0.00 0.00 0.00 0.00 0.00 ..... ..... 12:27:22 PM tps rtps wtps dtps bread/s bwrtn/s bdscd/s 12:27:24 PM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:27:22 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 12:27:24 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:27:24 PM enp1s0 1.50 0.00 0.72 0.00 0.00 0.00 0.00 0.00 Average: tps rtps wtps dtps bread/s bwrtn/s bdscd/s Average: 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Average: IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil Average: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Average: enp1s0 1.90 0.00 0.99 0.00 0.00 0.00 0.00 0.00 |
| [4] | SysStat packages includes other commands not only [Sar] command, so it's possible to display current statistics with them like follows. |
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# display I/O with Mega bytes per 2 seconds root@dlp:~# iostat -mx -d 2 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) Device r/s rMB/s rrqm/s %rrqm r_await rareq-sz w/s wMB/s wrqm/s %wrqm w_await wareq-sz d/s dMB/s drqm/s %drqm d_await dareq-sz f/s f_await aqu-sz %util dm-0 1.93 0.05 0.00 0.00 0.21 24.53 1.54 0.03 0.00 0.00 0.49 19.32 0.62 5.81 0.00 0.00 0.04 9543.00 0.00 0.00 0.00 0.06 dm-1 0.02 0.00 0.00 0.00 0.00 15.75 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 vda 1.61 0.05 0.41 20.24 0.14 30.27 0.79 0.03 0.77 49.32 0.86 37.58 0.64 5.99 0.00 0.00 0.04 9640.30 0.21 2.00 0.00 0.06 Device r/s rMB/s rrqm/s %rrqm r_await rareq-sz w/s wMB/s wrqm/s %wrqm w_await wareq-sz d/s dMB/s drqm/s %drqm d_await dareq-sz f/s f_await aqu-sz %util dm-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 vda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ..... ..... # display all CPU utilization per 2 seconds 3 times root@dlp:~# mpstat -P ALL 2 3 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 12:28:32 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 12:28:34 PM all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 12:28:34 PM 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 12:28:34 PM 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 12:28:34 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 12:28:36 PM all 0.00 0.00 0.25 0.00 0.00 0.00 0.00 0.00 0.00 99.75 12:28:36 PM 0 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 0.00 99.50 12:28:36 PM 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 12:28:36 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 12:28:38 PM all 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.00 0.00 99.75 12:28:38 PM 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 12:28:38 PM 1 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50 Average: CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle Average: all 0.00 0.00 0.08 0.08 0.00 0.00 0.00 0.00 0.00 99.83 Average: 0 0.00 0.00 0.17 0.00 0.00 0.00 0.00 0.00 0.00 99.83 Average: 1 0.00 0.00 0.00 0.17 0.00 0.00 0.00 0.00 0.00 99.83 # display memory utilization of specific process per a second 3 times root@dlp:~# pidstat -r -p 713 1 3 Linux 6.12.43+deb13-amd64 (dlp.srv.world) 09/18/2025 _x86_64_ (2 CPU) 12:29:16 PM UID PID minflt/s majflt/s VSZ RSS %MEM Command 12:29:17 PM 0 713 0.00 0.00 11768 7896 0.20 sshd 12:29:18 PM 0 713 0.00 0.00 11768 7896 0.20 sshd 12:29:19 PM 0 713 0.00 0.00 11768 7896 0.20 sshd Average: 0 713 0.00 0.00 11768 7896 0.20 sshd # display CIFS statistics with Mega bytes per a 1 second 3 times root@dlp:~# cifsiostat -m 1 3 Filesystem: rB/s wB/s rops/s wops/s fo/s fc/s fd/s \\10.0.0.100\tmp 0.00 20.93 0.00 0.00 0.00 0.00 0.00 ..... ..... |
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