In this post i will show how to install sysstat on Linux CentOS 5.7 server. Sysstat package is on of the method to monitor the linux server. sysstat package contains the sar, iostat and mpstat which are the system performance tools for Linux operating system. The sar command collects and reports system activity information. The iostat command reports CPU utilization and I/O statistics for disks. The mpstat command reports global and per-processor statistics. The statistics reported by sar concern I/O transfer rates, paging activity, process-related activities, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities and TTY statistics. All these tools can be schedule via cron to collect and historize performance and activity data. These are the list of sysstat’s available packages :
a) iostat(1) reports CPU statistics and input/output statistics for devices, partitions and network filesystems.
b) mpstat(1) reports individual or combined processor related statistics.
c) pidstat(1) reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc.
d) sar(1) collects, reports and saves system activity information (CPU, memory, disks, interrupts, network interfaces, TTY, kernel tables,etc.)
e) sadc(8) is the system activity data collector, used as a backend for sar.
f) sa1(8) collects and stores binary data in the system activity daily data file. It is a front end to sadc designed to be run from cron.
g) sa2(8) writes a summarized daily activity report. It is a front end to sar designed to be run from cron.
h) sadf(1) displays data collected by sar in multiple formats (CSV, XML, etc.) This is useful to load performance data into a database, or import them in a spreadsheet to make graphs.
i) nfsiostat(1) reports input/output statistics for network filesystems (NFS).
j) cifsiostat(1) reports CIFS statistics.
To install sysstat, simply run the following command :
[root@CentOS57 ~]# yum install sysstat -y Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.oscc.org.my * extras: mirror.oscc.org.my * rpmforge: fr2.rpmfind.net * updates: mirror.oscc.org.my Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package sysstat.i386 0:7.0.2-11.el5 set to be updated --> Finished Dependency Resolution Dependencies Resolved ==================================================================================================== Package Arch Version Repository Size ==================================================================================================== Installing: sysstat i386 7.0.2-11.el5 base 182 k Transaction Summary ==================================================================================================== Install 1 Package(s) Upgrade 0 Package(s) Total download size: 182 k Downloading Packages: sysstat-7.0.2-11.el5.i386.rpm | 182 kB 00:00 Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Installing : sysstat 1/1 Installed: sysstat.i386 0:7.0.2-11.el5 Complete!
To check the installed sysstat’s package using rpm command :
[root@CentOS57 ~]# rpm -qa sysstat sysstat-7.0.2-11.el5
To see sysstat manual simply run any of the sisgle package command. As an example sa1 :
[root@CentOS57 ~]# man sa1
SA1(8) Linux Userâs Manual SA1(8)
NAME
sa1 - Collect and store binary data in the system activity daily data file.
SYNOPSIS
/usr/lib/sa/sa1 [ interval count ]
DESCRIPTION
The sa1 command is a shell procedure variant of the sadc command and handles all of
the flags and parameters of that command. The sa1 command collects and store binary
data in the /var/log/sa/sadd file, where the dd parameter indicates the current
day. The interval and count parameters specify that the record should be written
count times at interval seconds. If you do not specify these parameters, a single
record is written.
The sa1 command is designed to be started automatically by the cron command.
EXAMPLES
To create a daily record of sar activities, place the following entry in your root
or adm crontab file:
0 8-18 * * 1-5 /usr/lib/sa/sa1 1200 3 &
FILES
/var/log/sa/sadd
Indicate the daily data file, where the dd parameter is a number represent-
ing the day of the month.
AUTHOR
Sebastien Godard (sysstat wanadoo.fr)
SEE ALSO
sar(1), sadc(8), sa2(8), sadf(1), mpstat(1), iostat(1), vmstat(8)
http://perso.orange.fr/sebastien.godard/
Linux JUNE 2006 SA1(8)