Collect and report system activity information using sysstat a system performance tools for the Linux operating system.
Installation
Install sysstat package.
$ sudo apt install sysstat
Enable collecting activity reports.
$ sudo sed -i -e "/^ENABLED/{s/false/true/}" /etc/default/sysstat
Default settings will look like this.
$ cat /etc/default/sysstat # # Default settings for /etc/init.d/sysstat, /etc/cron.d/sysstat # and /etc/cron.daily/sysstat files # # Should sadc collect system activity information? Valid values # are "true" and "false". Please do not put other values, they # will be overwritten by debconf! ENABLED="true"
By default activity reports are collected every 10 minutes.
$ cat /etc/cron.d/sysstat
# The first element of the path is a directory where the debian-sa1 # script is located PATH=/usr/lib/sysstat:/usr/sbin:/usr/sbin:/usr/bin:/sbin:/bin # Activity reports every 10 minutes everyday 5-55/10 * * * * root command -v debian-sa1 > /dev/null && debian-sa1 1 1 # Additional run at 23:59 to rotate the statistics file 59 23 * * * root command -v debian-sa1 > /dev/null && debian-sa1 60 2
This is the place to look when you want to change how often activity reports are collected.
Basic configuration
You can create /etc/sysstat/sysstat configuration file to define additional settings.
| Variable | Default value | Description |
|---|---|---|
SA_DIR | /var/log/sysstat | Directory used to store collected system activity data |
HISTORY | 7 | Keep collected system activity for defined number of days |
COMPRESSAFTER | 10 | Compress collected system activity after defined number of days |
ZIP | xz | Application used to compress data |
YESTERDAY | Provides possibility to generate current report instead of yesterday’s summary | |
REPORTS | Provides possibility to disable daily reports | |
SADC_OPTIONS | -S DISK | Additional options for system activity data collector |
Data collector configuration
Storing HISTORY for more than 28 days will automatically use file names like saYYYYMMDD instead of saDD.
Exclusive lock on the system activity file is not used by default, but you can add -L option apply this behavior.
To store more detailed system activity define -S ALL option (all activities including disk activities) or -S XALL (all activities including disk and partition/filesystem activities).
Final configuration
My personal configuration looks like this.
$ cat /etc/sysstat/sysstat
# sysstat configuration file. See sysstat(5) manual page. # How long to keep log files (in days). # Used by sa2(8) script # If value is greater than 28, then use sadc's option -D to prevent older # data files from being overwritten. See sadc(8) and sysstat(5) manual pages. HISTORY=90 # Compress (using xz, gzip or bzip2) sa and sar files older than (in days): COMPRESSAFTER=14 # Parameters for the system activity data collector (see sadc(8) manual page) # which are used for the generation of log files. # By default contains the `-S DISK' option responsible for generating disk # statisitcs. Use `-S XALL' to collect all available statistics. SADC_OPTIONS="-S XALL" # Directory where sa and sar files are saved. The directory must exist. SA_DIR=/var/log/sysstat # Compression program to use. ZIP="xz" # By default sa2 script generates yesterday's summary, since the cron job # usually runs right after midnight. If you want sa2 to generate the summary # of the same day (for example when cron job runs at 23:53) set this variable. #YESTERDAY=no # By default sa2 script generates reports files (the so called sarDD files). # Set this variable to false to disable reports generation. REPORTS=false
Basic usage
Report CPU utilization.
$ sar -u ALL
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 CPU %usr %nice %sys %iowait %steal %irq %soft %guest %gnice %idle 00:05:01 all 1.19 0.00 0.70 0.32 0.00 0.00 0.18 0.00 0.00 97.61 00:15:01 all 1.20 0.00 0.67 0.27 0.00 0.00 0.16 0.00 0.00 97.71 00:25:01 all 1.20 0.00 0.69 0.26 0.00 0.00 0.15 0.00 0.00 97.70 00:35:01 all 1.18 0.00 0.69 0.27 0.00 0.00 0.16 0.00 0.00 97.70 00:45:01 all 1.18 0.00 0.70 0.28 0.00 0.00 0.14 0.00 0.00 97.70 00:55:01 all 1.19 0.00 0.69 0.25 0.00 0.00 0.16 0.00 0.00 97.71 01:05:01 all 1.21 0.00 0.71 0.26 0.00 0.00 0.15 0.00 0.00 97.67 [...] 17:15:01 all 1.26 0.00 0.74 0.29 0.00 0.00 0.16 0.00 0.00 97.55 17:25:01 all 1.27 0.00 0.78 0.27 0.00 0.00 0.17 0.00 0.00 97.52 17:35:01 all 1.31 0.00 0.79 0.29 0.00 0.00 0.16 0.00 0.00 97.45 17:45:01 all 1.23 0.00 0.73 0.29 0.00 0.00 0.17 0.00 0.00 97.58 17:55:01 all 1.25 0.00 0.75 0.25 0.00 0.00 0.16 0.00 0.00 97.60 18:05:01 all 1.29 0.00 0.77 0.28 0.00 0.00 0.17 0.00 0.00 97.50 18:15:01 all 1.26 0.00 0.74 0.27 0.00 0.00 0.17 0.00 0.00 97.56 18:25:01 all 1.27 0.00 0.76 0.27 0.00 0.00 0.16 0.00 0.00 97.54 18:35:01 all 1.28 0.00 0.77 0.27 0.00 0.00 0.17 0.00 0.00 97.50 Average: all 1.22 0.00 0.71 0.27 0.00 0.00 0.16 0.00 0.00 97.64
Report per-processor CPU utilization.
$ sar -P ALL
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 CPU %user %nice %system %iowait %steal %idle 00:05:01 all 1.19 0.00 0.88 0.32 0.00 97.61 00:05:01 0 1.40 0.00 1.36 0.23 0.00 97.01 00:05:01 1 1.30 0.01 1.24 0.54 0.00 96.92 00:05:01 2 1.68 0.00 1.15 0.40 0.00 96.77 00:05:01 3 1.24 0.00 1.03 0.22 0.00 97.51 00:05:01 4 1.23 0.00 0.78 0.25 0.00 97.75 00:05:01 5 1.09 0.00 0.56 0.31 0.00 98.04 [...] 18:25:01 7 1.24 0.00 0.62 0.23 0.00 97.92 Average: all 1.22 0.00 0.87 0.27 0.00 97.64 Average: 0 1.28 0.00 1.39 0.25 0.00 97.09 Average: 1 1.37 0.00 1.10 0.25 0.00 97.27 Average: 2 1.31 0.00 1.13 0.25 0.00 97.31 Average: 3 1.22 0.00 0.90 0.24 0.00 97.63 Average: 4 1.15 0.00 0.65 0.28 0.00 97.92 Average: 5 1.17 0.00 0.61 0.30 0.00 97.91 Average: 6 1.14 0.00 0.59 0.29 0.00 97.97 Average: 7 1.10 0.00 0.57 0.28 0.00 98.04
Report memory utilization.
$ sar -r ALL
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 kbmemfree kbavail kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty kbanonpg kbslab kbkstack kbpgtbl kbvmused 00:05:01 32777820 32851276 47492 0.14 0 73456 13793352 26.32 62448 21220 12 4768392 0 14512 52200 0 00:15:01 32777588 32851044 47724 0.15 0 73456 13789980 26.31 62416 21220 8 4769624 0 14448 52204 0 00:25:01 32777680 32851136 47632 0.14 0 73456 13846336 26.42 62404 21220 20 4779044 0 14464 52196 0 00:35:01 32777756 32851212 47556 0.14 0 73456 13802616 26.33 62424 21220 4 4785720 0 14512 52332 0 00:45:01 32778032 32851488 47280 0.14 0 73456 13814180 26.36 62432 21220 8 4785704 0 14496 52200 0 00:55:01 32777904 32851360 47408 0.14 0 73456 13812644 26.35 62440 21220 8 4786292 0 14432 52132 0 01:05:01 32777980 32851436 47332 0.14 0 73456 13820720 26.37 62404 21220 160 4816384 0 14448 52376 0 [...] 17:35:01 32746380 32850064 48704 0.15 0 103684 14110332 26.92 94636 19616 4 5233252 0 15120 53100 0 17:45:01 32746840 32850524 48244 0.15 0 103684 14122524 26.94 94632 19612 4 5232584 0 15312 53320 0 17:55:01 32745460 32849144 49624 0.15 0 103684 14135848 26.97 95496 19612 0 5228068 0 15152 53176 0 18:05:01 32743352 32847168 51600 0.16 0 103816 14115440 26.93 97720 19620 8 5245400 0 15200 53316 0 18:15:01 32746428 32850244 48524 0.15 0 103816 14126236 26.95 94752 19628 0 5241028 0 15152 53416 0 18:25:01 32746304 32850120 48648 0.15 0 103816 14114288 26.93 94936 19640 4 5216108 0 15136 53236 0 18:35:01 32775564 32849800 48968 0.15 0 74236 14127384 26.95 65196 19748 8 5220928 0 15840 53284 0 18:45:01 32774080 32848316 50452 0.15 0 74236 14130340 26.96 66312 19628 8 5221756 0 15184 53300 0 18:55:01 32774280 32848516 50252 0.15 0 74236 14127640 26.95 66324 19628 0 5208968 0 15136 53300 0 Average: 32758329 32851164 47604 0.14 0 92835 13723997 26.18 81214 21617 53 4993330 0 14316 51488 0
Report swap space utilization.
$ sar -S
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 kbswpfree kbswpused %swpused kbswpcad %swpcad 00:05:01 19514236 0 0.00 0 0.00 00:15:01 19514236 0 0.00 0 0.00 00:25:01 19514236 0 0.00 0 0.00 00:35:01 19514236 0 0.00 0 0.00 00:45:01 19514236 0 0.00 0 0.00 00:55:01 19514236 0 0.00 0 0.00 01:05:01 19514236 0 0.00 0 0.00 [...] 17:05:01 19514236 0 0.00 0 0.00 17:15:01 19514236 0 0.00 0 0.00 17:25:01 19514236 0 0.00 0 0.00 17:35:01 19514236 0 0.00 0 0.00 17:45:01 19514236 0 0.00 0 0.00 17:55:01 19514236 0 0.00 0 0.00 18:05:01 19514236 0 0.00 0 0.00 18:15:01 19514236 0 0.00 0 0.00 18:25:01 19514236 0 0.00 0 0.00 Average: 19514236 0 0.00 0 0.00
Report hugepages utilization.
$ sar -H
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 kbhugfree kbhugused %hugused 00:05:01 0 0 0.00 00:15:01 0 0 0.00 00:25:01 0 0 0.00 00:35:01 0 0 0.00 00:45:01 0 0 0.00 00:55:01 0 0 0.00 01:05:01 0 0 0.00 [...] 17:05:01 0 0 0.00 17:15:01 0 0 0.00 17:25:01 0 0 0.00 17:35:01 0 0 0.00 17:45:01 0 0 0.00 17:55:01 0 0 0.00 18:05:01 0 0 0.00 18:15:01 0 0 0.00 18:25:01 0 0 0.00 Average: 0 0 0.00
Report paging statistics.
$ sar -B
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 pgpgin/s pgpgout/s fault/s majflt/s pgfree/s pgscank/s pgscand/s pgsteal/s %vmeff 00:05:01 0.03 495.87 627.40 5.25 1033.93 0.00 0.00 0.00 0.00 00:15:01 0.12 547.95 492.40 0.00 905.45 0.00 0.00 0.00 0.00 00:25:01 0.03 465.46 490.89 0.00 900.52 0.00 0.00 0.00 0.00 00:35:01 0.17 444.77 498.67 0.01 913.55 0.00 0.00 0.00 0.00 00:45:01 0.00 491.91 494.49 0.00 915.29 0.00 0.00 0.00 0.00 00:55:01 3.24 532.03 501.46 0.00 926.38 0.00 0.00 0.00 0.00 01:05:01 0.80 620.96 496.81 0.07 1037.30 0.00 0.00 0.00 0.00 [...] 17:05:01 0.36 839.39 506.22 0.07 979.97 0.00 0.00 0.00 0.00 17:15:01 0.70 767.18 531.67 0.00 1003.84 0.00 0.00 0.00 0.00 17:25:01 0.12 801.29 536.39 0.03 1021.67 0.00 0.00 0.00 0.00 17:35:01 0.28 846.93 535.55 0.02 1021.78 0.00 0.00 0.00 0.00 17:45:01 0.38 859.77 517.30 0.00 998.41 0.00 0.00 0.00 0.00 17:55:01 3.91 562.38 502.70 0.00 959.94 0.00 0.00 0.00 0.00 18:05:01 0.27 808.23 519.15 0.05 993.07 0.00 0.00 0.00 0.00 18:15:01 0.03 683.87 517.77 0.01 979.05 0.00 0.00 0.00 0.00 18:25:01 0.30 737.74 514.47 0.07 987.79 0.00 0.00 0.00 0.00 Average: 1.02 664.22 537.04 0.55 1023.61 0.00 0.00 0.00 0.00
Report swapping statistics.
$ sar -W
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 pswpin/s pswpout/s 00:05:01 0.00 0.00 00:15:01 0.00 0.00 00:25:01 0.00 0.00 00:35:01 0.00 0.00 00:45:01 0.00 0.00 00:55:01 0.00 0.00 01:05:01 0.00 0.00 [...] 17:05:01 0.00 0.00 17:15:01 0.00 0.00 17:25:01 0.00 0.00 17:35:01 0.00 0.00 17:45:01 0.00 0.00 17:55:01 0.00 0.00 18:05:01 0.00 0.00 18:15:01 0.00 0.00 18:25:01 0.00 0.00 Average: 0.00 0.00
Report I/O and transfer rate statistics.
$ sar -b
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 tps rtps wtps bread/s bwrtn/s 00:05:01 0.63 0.63 0.00 0.01 0.00 00:15:01 0.00 0.00 0.00 0.00 0.00 00:25:01 0.00 0.00 0.00 0.00 0.00 00:35:01 0.00 0.00 0.00 0.00 0.00 00:45:01 0.00 0.00 0.00 0.00 0.00 00:55:01 0.00 0.00 0.00 0.00 0.00 01:05:01 0.00 0.00 0.00 0.00 0.00 [...] 17:05:01 0.01 0.01 0.00 0.34 0.00 17:15:01 0.01 0.01 0.00 0.99 0.00 17:25:01 0.01 0.01 0.00 0.20 0.00 17:35:01 0.00 0.00 0.00 0.56 0.00 17:45:01 0.00 0.00 0.00 0.00 0.00 17:55:01 0.00 0.00 0.00 0.00 0.00 18:05:01 0.01 0.01 0.00 0.48 0.00 18:15:01 0.00 0.00 0.00 0.00 0.00 18:25:01 0.01 0.01 0.00 0.40 0.00 Average: 0.01 0.01 0.00 0.12 0.00
Report block device activity.
$ sar -d
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util 00:05:01 dev8-16 0.31 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:05:01 dev8-0 0.32 0.01 0.00 0.02 0.00 0.34 0.33 0.01 00:15:01 dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 dev8-0 0.00 0.00 0.00 0.50 0.00 11.00 11.00 0.00 00:35:01 dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 [...] 17:55:01 dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 17:55:01 dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 18:05:01 dev8-16 0.00 0.24 0.00 71.25 0.00 8.00 8.00 0.00 18:05:01 dev8-0 0.00 0.00 0.00 1.00 0.00 8.00 8.00 0.00 18:15:01 dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 18:15:01 dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 18:25:01 dev8-16 0.01 0.16 0.00 31.83 0.00 10.33 10.33 0.01 18:25:01 dev8-0 0.00 0.04 0.00 12.75 0.00 15.50 15.50 0.01 Average: dev8-16 0.00 0.04 0.00 12.47 0.00 2.16 2.07 0.00 Average: dev8-0 0.00 0.03 0.00 7.69 0.00 3.38 3.36 0.00
Report process creation and system switching activity.
$ sar -w
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 proc/s cswch/s 00:05:01 37.69 2005.97 00:15:01 35.54 1963.31 00:25:01 36.42 1972.02 00:35:01 36.57 1965.92 00:45:01 36.00 1957.36 00:55:01 35.84 1967.56 01:05:01 42.18 2080.09 [...] 17:05:01 38.20 2080.53 17:15:01 37.26 2270.71 17:25:01 40.89 2561.91 17:35:01 39.85 2776.74 17:45:01 38.69 2116.36 17:55:01 37.11 2020.83 18:05:01 38.25 2656.46 18:15:01 39.23 2363.74 18:25:01 38.40 2488.49 Average: 38.68 2058.42
Report queue length and load averages.
$ sar -q
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 blocked 00:05:01 0 901 0.04 0.22 0.26 0 00:15:01 2 898 0.18 0.26 0.26 0 00:25:01 1 899 0.02 0.08 0.17 0 00:35:01 0 901 0.25 0.16 0.14 0 00:45:01 0 901 0.01 0.05 0.08 0 00:55:01 0 899 0.25 0.26 0.16 0 01:05:01 0 901 0.12 0.19 0.17 0 [...] 17:05:01 0 935 0.38 0.21 0.13 0 17:15:01 0 936 0.70 0.57 0.35 0 17:25:01 0 945 0.08 0.28 0.31 0 17:35:01 0 941 0.37 0.31 0.29 0 17:45:01 0 952 0.06 0.14 0.21 0 17:55:01 0 942 0.48 0.18 0.17 0 18:05:01 0 942 0.12 0.15 0.16 0 18:15:01 0 938 0.10 0.07 0.09 0 18:25:01 0 940 0.57 0.30 0.19 0 Average: 0 888 0.20 0.20 0.18 0
Report network utilization.
$ sar -n ALL
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 00:00:01 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 00:05:01 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:05:01 eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 eth0 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 eth0 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 [...] 00:00:01 IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/s 00:05:01 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:05:01 eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 [...] 00:00:01 call/s retrans/s read/s write/s access/s getatt/s 00:05:01 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 0.00 0.00 0.00 0.00 0.00 0.00 [...] 00:00:01 scall/s badcall/s packet/s udp/s tcp/s hit/s miss/s sread/s swrite/s saccess/s sgetatt/s 00:05:01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:15:01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00:25:01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 [...] 00:00:01 totsck tcpsck udpsck rawsck ip-frag tcp-tw 00:05:01 39 1 1 0 0 0 00:15:01 37 1 1 0 0 0 00:25:01 39 1 1 0 0 0 [...] 00:00:01 CPU total/s dropd/s squeezd/s rx_rps/s flw_lim/s 00:05:01 all 104.11 0.00 0.41 0.00 0.00 00:15:01 all 105.80 0.00 0.31 0.00 0.00 00:25:01 all 107.91 0.00 0.42 0.00 0.00 [...] 17:55:01 all 111.76 0.00 0.41 0.00 0.00 18:05:01 all 113.60 0.00 0.47 0.00 0.00 18:15:01 all 107.98 0.00 0.45 0.00 0.00 18:25:01 all 109.00 0.00 0.41 0.00 0.00 Average: all 106.91 0.00 0.38 0.00 0.00
Advanced usage
Display data in human readable way.
$ sar -r -h
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 19:55:01 kbmemfree kbavail kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty 20:05:01 31.3G 31.3G 48.1M 0.1% 0.0k 72.5M 13.4G 26.9% 63.6M 19.3M 8.0k 20:15:01 31.3G 31.3G 48.1M 0.1% 0.0k 72.5M 13.4G 26.9% 63.6M 19.3M 8.0k 20:25:01 31.3G 31.3G 51.0M 0.2% 0.0k 72.5M 13.4G 26.9% 66.5M 19.2M 24.0k 20:35:01 31.3G 31.3G 51.1M 0.2% 0.0k 72.5M 13.5G 27.0% 66.5M 19.2M 8.0k 20:45:01 31.3G 31.3G 51.0M 0.2% 0.0k 72.5M 13.4G 26.9% 66.5M 19.2M 12.0k 20:55:01 31.3G 31.3G 48.3M 0.2% 0.0k 72.5M 13.5G 26.9% 63.6M 19.2M 20.0k 21:05:01 31.3G 31.3G 48.3M 0.2% 0.0k 72.5M 13.4G 26.8% 63.7M 19.2M 16.0k 21:15:01 31.3G 31.3G 48.3M 0.2% 0.0k 72.5M 13.5G 26.9% 63.7M 19.2M 340.0k 21:25:01 31.3G 31.3G 48.4M 0.2% 0.0k 72.5M 13.5G 26.9% 63.7M 19.2M 8.0k 21:35:01 31.3G 31.3G 48.4M 0.2% 0.0k 72.5M 13.4G 26.9% 63.7M 19.2M 20.0k 21:45:01 31.3G 31.3G 48.3M 0.2% 0.0k 72.5M 13.4G 26.9% 63.6M 19.2M 4.0k Average: 31.3G 31.3G 49.0M 0.2% 0.0k 72.5M 13.4G 26.9% 64.4M 19.2M 42.5k
Display data from 20:00 to 21:00.
$ sar -s 20:00 -e 21:00 -r -h
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 20:05:01 kbmemfree kbavail kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty 20:15:01 31.3G 31.3G 48.1M 0.1% 0.0k 72.5M 13.4G 26.9% 63.6M 19.3M 8.0k 20:25:01 31.3G 31.3G 51.0M 0.2% 0.0k 72.5M 13.4G 26.9% 66.5M 19.2M 24.0k 20:35:01 31.3G 31.3G 51.1M 0.2% 0.0k 72.5M 13.5G 27.0% 66.5M 19.2M 8.0k 20:45:01 31.3G 31.3G 51.0M 0.2% 0.0k 72.5M 13.4G 26.9% 66.5M 19.2M 12.0k 20:55:01 31.3G 31.3G 48.3M 0.2% 0.0k 72.5M 13.5G 26.9% 63.6M 19.2M 20.0k Average: 31.3G 31.3G 49.9M 0.2% 0.0k 72.5M 13.4G 26.9% 65.4M 19.2M 14.4k
Display data from 04:00 to 05:00 stored in specified file.
$ sar -s 04:00 -e 05:00 -u -f /var/log/sysstat/sa20190328
Linux 4.18.0-15-generic (debian-test) 03/28/19 _x86_64_ (8 CPU) 04:05:01 CPU %user %nice %system %iowait %steal %idle 04:15:01 all 1.19 0.00 0.87 0.27 0.00 97.67 04:25:01 all 1.37 0.00 0.85 0.27 0.00 97.51 04:35:01 all 1.36 0.00 0.95 0.31 0.00 97.38 04:45:01 all 1.24 0.07 0.85 0.27 0.00 97.57 04:55:01 all 1.19 0.00 0.81 0.26 0.00 97.73 Average: all 1.27 0.01 0.87 0.28 0.00 97.57