How To use sar tool to monitor system performance in ParrotOs 3.9
To use sar tool in ParrotOs 3.9
sar is part of sysstat package. sar tool is used to monitor the performance of various Linux subsystems. It collects performance data and stores them. This tutorial explains how to monitor the Linux system performance using sar tool.
Using sar tool
First, you need to install sysstat which is essential for this installation process.
┌─[root@linuxhelp]─[~]
└──╼ #apt-get install sysstat
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
isag
The following packages will be upgraded:
sysstat
1 upgraded, 0 newly installed, 0 to remove and 1332 not upgraded.
Need to get 390 kB of archives.
After this operation, 15.4 kB of additional disk space will be used.
Get:1 http://parrot.asis.io stable/main amd64 sysstat amd64 11.6.1-1 [390 kB]
Fetched 390 kB in 4s (83.7 kB/s)
Preconfiguring packages ...
(Reading database ... 419795 files and directories currently installed.)
Preparing to unpack .../sysstat_11.6.1-1_amd64.deb ...
Unpacking sysstat (11.6.1-1) over (11.6.0-1) ...
Setting up sysstat (11.6.1-1) ...
Installing new version of config file /etc/sysstat/sysstat ...
Processing triggers for doc-base (0.10.7) ...
Processing 1 changed doc-base file...
Registering documents with scrollkeeper...
Processing triggers for systemd (235-2) ...
Processing triggers for man-db (2.7.6.1-2) ...
Configuring sandbox profiles....
Sandbox profile
To check the version of sar, you need to run the sar command with -v option.
┌──[root@linuxhelp]─[~]
└──╼ #sar -V
sysstat version 11.6.0
(C) Sebastien Godard (sysstat < at> orange.fr)
Option -q is used with sar to display the total no of processes, queue length and load average of your system, with some time interval.
┌─[root@linuxhelp]─[~]
└──╼ #sar -q 2 5
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
03:43:06 IST runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 blocked
03:43:08 IST 1 272 0.01 0.02 0.02 0
03:43:10 IST 0 272 0.01 0.02 0.02 0
03:43:12 IST 0 272 0.01 0.02 0.02 0
03:43:14 IST 0 272 0.01 0.02 0.02 0
03:43:16 IST 0 272 0.01 0.02 0.02 0
Average: 0 272 0.01 0.02 0.02 0
In order to view the network statistics, you need to run the following command.
┌─[root@linuxhelp]─[~]
└──╼ #sar -n DEV 1 1
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
03:51:04 IST IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil
03:51:05 IST lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:51:05 IST eth0 10.00 0.00 0.59 0.00 0.00 0.00 0.00 0.05
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: eth0 10.00 0.00 0.59 0.00 0.00 0.00 0.00 0.05
In order to exclude any particular network device, make sure you run the following command.
┌─[root@linuxhelp]─[~]
└──╼ #sar -n DEV 1 1 | egrep -v eth0
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
03:44:00 IST IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil
03:44:01 IST lo 0.00 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
To know the disk statics of your system with some time delay and line counts, then use option &ndash d with sar command.
┌─[root@linuxhelp]─[~]
└──╼ #sar -d 1 2
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
03:55:33 IST DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util
03:55:34 IST dev8-0 2.00 0.00 12.00 6.00 0.00 0.00 0.00 0.00
03:55:34 IST DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util
03:55:35 IST dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util
Average: dev8-0 1.00 0.00 6.00 6.00 0.00 0.00 0.00 0.00
To view the memory statics of your system with some delay and line counts, run the following command.
┌─[root@linuxhelp]─[~]
└──╼ #sar -r 1 3
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
03:57:35 IST kbmemfree kbavail kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty
03:57:36 IST 81392 220316 852152 91.28 35480 215688 2335840 80.93 370684 300868 0
03:57:37 IST 81360 220284 852184 91.28 35480 215688 2335840 80.93 370684 300868 0
03:57:38 IST 81416 220340 852128 91.28 35480 215688 2335840 80.93 370684 300868 0
Average: 81389 220313 852155 91.28 35480 215688 2335840 80.93 370684 300868 0
To display only CPU statistic of your system
If you want to display only CPU statistic of your system with some time delay and line counts use option &ndash u with sar command.
┌─[root@linuxhelp]─[~]
└──╼ #sar -u 1 3
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
03:58:45 IST CPU %user %nice %system %iowait %steal %idle
03:58:46 IST all 1.52 0.00 0.51 0.00 0.00 97.98
03:58:47 IST all 2.53 0.00 1.01 0.00 0.00 96.46
03:58:48 IST all 2.02 0.00 1.52 0.00 0.00 96.46
Average: all 2.02 0.00 1.01 0.00 0.00 96.97
If you want to check the specific CPU usage of your system, use &ndash P with your processor name. In the below command, ALL option will list all CPU statistic of your system. Suppose in your machine, if you have three CPU core by default then your first system number starts with 0 and 2nd CPU number is 1 and remaining CPU number followed by the series.
┌─[root@linuxhelp]─[~]
└──╼ #sar -P ALL 1 1
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
04:00:38 IST CPU %user %nice %system %iowait %steal %idle
04:00:39 IST all 0.00 0.00 1.01 0.00 0.00 98.99
04:00:39 IST 0 0.00 0.00 1.01 0.00 0.00 98.99
04:00:39 IST 1 0.00 0.00 1.00 0.00 0.00 99.00
Average: CPU %user %nice %system %iowait %steal %idle
Average: all 0.00 0.00 1.01 0.00 0.00 98.99
Average: 0 0.00 0.00 1.01 0.00 0.00 98.99
Average: 1 0.00 0.00 1.00 0.00 0.00 99.00
If you want to know your swap memory statistic report then use option -S it swap memory statistic, suppose in your output “ kbswpfree” and “ swpused” in 0 state means your system is not booting.
┌─[root@linuxhelp]─[~]
└──╼ #sar -S 1 1
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
04:02:17 IST kbswpfree kbswpused %swpused kbswpcad %swpcad
04:02:18 IST 1945584 7180 0.37 1708 23.79
Average: 1945584 7180 0.37 1708 23.79
If you want to know the input and output statistic of your CPU with some time delay and no of counts, then use option &ndash b.
┌─[root@linuxhelp]─[~]
└──╼ #sar -b 1 3
Linux 4.13.0-parrot4-amd64 (www.linuxhelp1.com) Friday 12 January 2018 _x86_64_ (2 CPU)
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
09:54:58 PM tps rtps wtps bread/s bwrtn/s
09:54:59 PM 2.04 0.00 2.04 0.00 89.80
09:55:00 PM 0.00 0.00 0.00 0.00 0.00
Average: 1.02 0.00 1.02 0.00 44.90
tps &ndash Transactions per second (this includes both read and write)
rtps &ndash Read transactions per second
wtps &ndash Write transactions per second
bread/s &ndash Bytes read per second
bwrtn/s &ndash Bytes written per second
Using -w, the total number of processes created per second, and total number of context switches per second, with some time delay and line counts, can be checked.
┌─[root@linuxhelp]─[~]
└──╼ #sar -w 1 3
Linux 4.13.0-parrot4-amd64 (linuxhelp) Friday 12 January 2018 _x86_64_ (2 CPU)
04:05:15 IST proc/s cswch/s
04:05:16 IST 0.00 276.00
04:05:17 IST 0.00 191.00
04:05:18 IST 0.00 212.00
Average: 0.00 226.33
Collect, report, or save system activity information.
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