Debian 11 Bullseye
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SysStat : How to use2021/09/16

 
How to use SysStat.
To input [sar] command with specifying options like follows, it's possible to display logs.
(refer to [man sar] for more details)
Option Description
-u CPU utilization statistics
-r Memory utilization statistics
-b I/O and transfer rate statistics
-B Paging statistics
-d Activity for each block device
-n [keyword] Network statistics
-q Queue length and load averages
-A Display All

[1] Display today's statics reports.
# CPU

root@dlp:~#
sar -u

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:00:04 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle
12:05:08 AM     all      0.67      0.01      0.22      2.99      0.00     96.11
12:10:08 AM     all      0.18      0.00      0.19      2.09      0.00     97.54
Average:        all      0.43      0.00      0.21      2.54      0.00     96.82

# memory

root@dlp:~#
sar -r

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:00:04 AM kbmemfree   kbavail kbmemused  %memused kbbuffers  kbcached  kbcommit   %commit  kbactive   kbinact   kbdirty
12:05:08 AM   2689020   3320692    411716     10.23     95484    736388   1432732     28.49    318984    880416       104
12:10:08 AM   2687988   3320388    412060     10.24     95836    736736   1432732     28.49    319424    881044       200
Average:      2688504   3320540    411888     10.23     95660    736562   1432732     28.49    319204    880730       152

# I/O

root@dlp:~#
sar -b

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:00:04 AM       tps      rtps      wtps      dtps   bread/s   bwrtn/s   bdscd/s
12:05:08 AM      6.80      0.28      6.52      0.00      2.79     54.85      0.00
12:10:08 AM      4.99      0.00      4.99      0.00      0.00     33.97      0.00
Average:         5.90      0.14      5.76      0.00      1.41     44.47      0.00

# network

root@dlp:~#
sar -n DEV

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:00:04 AM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil
12:05:08 AM        lo      7.38      7.38      0.44      0.44      0.00      0.00      0.00      0.00
12:05:08 AM    enp1s0      5.64      5.45      0.74      4.03      0.00      0.00      0.00      0.00
12:10:08 AM        lo      7.14      7.14      0.44      0.44      0.00      0.00      0.00      0.00
12:10:08 AM    enp1s0      4.79      4.28      0.59      0.37      0.00      0.00      0.00      0.00
Average:           lo      7.26      7.26      0.44      0.44      0.00      0.00      0.00      0.00
Average:       enp1s0      5.22      4.86      0.67      2.21      0.00      0.00      0.00      0.00

# load avarage

root@dlp:~#
sar -q

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:00:04 AM   runq-sz  plist-sz   ldavg-1   ldavg-5  ldavg-15   blocked
12:05:08 AM         0       219      0.14      0.07      0.07         1
12:10:08 AM         0       219      0.08      0.09      0.08         0
Average:            0       219      0.11      0.08      0.07         0
[2] Display past statics with specifying a log file.
Log files are stored under the [/var/log/sa] directory by default.
# display all statics by a log file

root@dlp:~#
sar -A -f /var/log/sysstat/sa15

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/15/2021      _x86_64_        (2 CPU)

06:37:57 PM  LINUX RESTART      (2 CPU)

06:40:04 PM     CPU      %usr     %nice      %sys   %iowait    %steal      %irq     %soft    %guest    %gnice     %idle
06:50:23 PM     all      0.09      0.00      0.02      0.05      0.00      0.00      0.00      0.00      0.00     99.84
06:50:23 PM       0      0.01      0.00      0.02      0.03      0.00      0.00      0.00      0.00      0.00     99.94
06:50:23 PM       1      0.17      0.00      0.02      0.07      0.00      0.00      0.00      0.00      0.00     99.74
07:00:24 PM     all      0.00      0.00      0.01      0.07      0.00      0.00      0.00      0.00      0.00     99.92
07:00:24 PM       0      0.00      0.00      0.01      0.13      0.00      0.00      0.00      0.00      0.00     99.85

.....
.....

11:35:08 PM      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
11:40:08 PM      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
11:45:01 PM      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
11:50:08 PM      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
11:55:08 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 22:00:00 -e 23:00:00 -f /var/log/sysstat/sa15

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/15/2021      _x86_64_        (2 CPU)

10:00:04 PM   runq-sz  plist-sz   ldavg-1   ldavg-5  ldavg-15   blocked
10:05:07 PM         0       217      0.06      0.07      0.08         0
10:10:07 PM         0       220      0.01      0.04      0.07         1
10:15:01 PM         0       220      0.03      0.06      0.07         0
10:20:07 PM         0       218      0.07      0.07      0.07         1
10:25:07 PM         0       220      0.01      0.04      0.06         0
10:30:07 PM         0       218      0.06      0.03      0.04         1
10:35:07 PM         0       219      0.27      0.14      0.07         0
10:40:07 PM         0       220      0.04      0.08      0.07         0
10:45:01 PM         0       220      0.01      0.05      0.06         0
10:50:07 PM         0       213      0.08      0.06      0.05         0
10:55:08 PM         3       214      0.36      0.17      0.09         0
Average:            0       218      0.09      0.07      0.07         0
[3] Display current statics.
# display CPU utilization per a second 3 times

root@dlp:~#
sar -u 1 3

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:13:22 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle
12:13:23 AM     all      0.00      0.00      0.50      3.50      0.00     96.00
12:13:24 AM     all      0.50      0.00      0.50      1.00      0.00     98.00
12:13:25 AM     all      0.00      0.00      0.00      1.52      0.00     98.48
Average:        all      0.17      0.00      0.33      2.01      0.00     97.49

# display I/O and network per 2 seconds 5 times

root@dlp:~#
sar -b -n DEV 2 5

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:13:37 AM       tps      rtps      wtps      dtps   bread/s   bwrtn/s   bdscd/s
12:13:39 AM      4.00      0.00      4.00      0.00      0.00     16.00      0.00

12:13:37 AM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil
12:13:39 AM        lo     10.00     10.00      0.58      0.58      0.00      0.00      0.00      0.00
12:13:39 AM    enp1s0      0.50      0.00      0.03      0.00      0.00      0.00      0.00      0.00

.....
.....

12:13:45 AM       tps      rtps      wtps      dtps   bread/s   bwrtn/s   bdscd/s
12:13:47 AM      5.00      0.00      5.00      0.00      0.00     36.00      0.00

12:13:45 AM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil
12:13:47 AM        lo     10.00     10.00      0.59      0.59      0.00      0.00      0.00      0.00
12:13:47 AM    enp1s0      0.50      0.00      0.03      0.00      0.00      0.00      0.00      0.00

Average:          tps      rtps      wtps      dtps   bread/s   bwrtn/s   bdscd/s
Average:         4.50      0.00      4.50      0.00      0.00     22.40      0.00

Average:        IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil
Average:           lo     10.00     10.00      0.58      0.58      0.00      0.00      0.00      0.00
Average:       enp1s0      0.50      0.00      0.03      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 statics with them like follows.
# display I/O with Mega bytes per 2 seconds

root@dlp:~#
iostat -mx -d 2

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _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             0.31      0.01     0.00   0.00    0.22    31.64   10.40      0.08     0.00   0.00    6.35     7.96    0.14      1.36     0.00   0.00    0.03 10160.94    0.00    0.00    0.07   6.11
dm-1             0.01      0.00     0.00   0.00    0.07    21.26    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              0.24      0.01     0.09  27.71    0.27    42.90    6.74      0.08     3.69  35.36    9.28    11.93    0.15      1.38     0.00   0.00    0.03  9656.21    3.18   17.19    0.12   6.11


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    7.50      0.03     0.00   0.00    8.00     3.47    0.00      0.00     0.00   0.00    0.00     0.00    0.00    0.00    0.06   6.60
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    5.00      0.02     2.50  33.33   12.00     4.80    0.00      0.00     0.00   0.00    0.00     0.00    2.50   23.60    0.12   6.60

.....
.....

# display all CPU utilization per 2 seconds 3 times

root@dlp:~#
mpstat -P ALL 2 3

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:15:15 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
12:15:17 AM  all    0.25    0.00    0.00    2.00    0.00    0.00    0.00    0.00    0.00   97.75
12:15:17 AM    0    0.50    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00   99.50
12:15:17 AM    1    0.00    0.00    0.00    4.02    0.00    0.00    0.00    0.00    0.00   95.98

12:15:17 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
12:15:19 AM  all    0.00    0.00    0.25    2.02    0.00    0.00    0.00    0.00    0.00   97.73
12:15:19 AM    0    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
12:15:19 AM    1    0.00    0.00    0.50    4.02    0.00    0.00    0.00    0.00    0.00   95.48

12:15:19 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
12:15:21 AM  all    0.00    0.00    0.50    3.50    0.00    0.00    0.00    0.00    0.00   96.00
12:15:21 AM    0    0.00    0.00    0.50    1.49    0.00    0.00    0.00    0.00    0.00   98.01
12:15:21 AM    1    0.00    0.00    0.50    5.53    0.00    0.00    0.00    0.00    0.00   93.97

Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:     all    0.08    0.00    0.25    2.51    0.00    0.00    0.00    0.00    0.00   97.16
Average:       0    0.17    0.00    0.17    0.50    0.00    0.00    0.00    0.00    0.00   99.17
Average:       1    0.00    0.00    0.34    4.52    0.00    0.00    0.00    0.00    0.00   95.14

# display memory utilization of specific process per a second 3 times

root@dlp:~#
pidstat -r -p 21090 1 3

Linux 5.10.0-8-amd64 (dlp.srv.world)    09/16/2021      _x86_64_        (2 CPU)

12:16:34 AM   UID       PID  minflt/s  majflt/s     VSZ     RSS   %MEM  Command
12:16:35 AM    33     21090      0.00      0.00  218328   15192   0.38  apache2
12:16:36 AM    33     21090      0.00      0.00  218328   15192   0.38  apache2
12:16:37 AM    33     21090      0.00      0.00  218328   15192   0.38  apache2
Average:       33     21090      0.00      0.00  218328   15192   0.38  apache2

# display CIFS statics 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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