139 lines
6.2 KiB
Markdown
139 lines
6.2 KiB
Markdown
|
### sysstat - System performance tools for the Linux operating system
|
||
|
|
|
||
|
|
### Introduction
|
||
|
|
|
||
|
|
The sysstat package contains various utilities, common to many commercial Unixes, to monitor system performance and usage activity:
|
||
|
|
|
||
|
|
- iostat reports CPU statistics and input/output statistics for block devices and partitions.
|
||
|
|
- mpstat reports individual or combined processor related statistics.
|
||
|
|
- pidstat reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc.
|
||
|
|
- tapestat reports statistics for tape drives connected to the system.
|
||
|
|
- cifsiostat reports CIFS statistics.
|
||
|
|
|
||
|
|
Sysstat also contains tools you can schedule via cron or systemd to collect and historize performance and activity data:
|
||
|
|
|
||
|
|
- sar collects, reports and saves system activity information (see below a list of metrics collected by sar).
|
||
|
|
- sadc is the system activity data collector, used as a backend for sar.
|
||
|
|
- sa1 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 or systemd.
|
||
|
|
- sa2 writes a summarized daily activity report. It is a front end to sar designed to be run from cron or systemd.
|
||
|
|
- sadf displays data collected by sar in multiple formats (CSV, XML, JSON, etc.) and can be used for data exchange with other programs. This command can
|
||
|
|
also be used to draw graphs for the various activities collected by sar using SVG (Scalable Vector Graphics) format.
|
||
|
|
|
||
|
|
Default sampling interval is 10 minutes but this can be changed of course (it can be as small as 1 second).
|
||
|
|
|
||
|
|
### System statistics collected by sar:
|
||
|
|
|
||
|
|
- Input / Output and transfer rate statistics (global, per device, per partition and per network filesystem)
|
||
|
|
- CPU statistics (global and per CPU), including support for virtualization architectures
|
||
|
|
- Memory, hugepages and swap space utilization statistics
|
||
|
|
- Virtual memory, paging and fault statistics
|
||
|
|
- Process creation activity
|
||
|
|
- Interrupt statistics (global, per CPU and per interrupt, including potential APIC interrupt sources, hardware and software interrupts)
|
||
|
|
- Extensive network statistics: network interface activity (number of packets and kB received and transmitted per second, etc.) including failures
|
||
|
|
from network devices; network traffic statistics for IP, TCP, ICMP and UDP protocols based on SNMPv2 standards; support for IPv6-related protocols
|
||
|
|
- Fibre Channel traffic statistics
|
||
|
|
- Software-based network processing (softnet) statistics
|
||
|
|
- NFS server and client activity
|
||
|
|
- Sockets statistics
|
||
|
|
- Run queue and system load statistics
|
||
|
|
- Kernel internal tables utilization statistics
|
||
|
|
- Swapping statistics
|
||
|
|
- TTY devices activity
|
||
|
|
- Power management statistics (instantaneous and average CPU clock frequency, fans speed, devices temperature, voltage inputs)
|
||
|
|
- USB devices plugged into the system
|
||
|
|
- Filesystems utilization (inodes and blocks)
|
||
|
|
- Pressure-Stall Information statistics
|
||
|
|
|
||
|
|
### Sysstat key features:
|
||
|
|
|
||
|
|
|
||
|
|
- Display average statistics values at the end of the reports.
|
||
|
|
- On-the-fly detection of new devices (disks, network interfaces, etc.) that are created or registered dynamically.
|
||
|
|
- Support for UP and SMP machines, including machines with hyperthreaded or multi-core processors.
|
||
|
|
- Support for hotplug CPUs (it detects automagically processors that are disabled or enabled on the fly) and tickless CPUs.
|
||
|
|
- Works on many different architectures, whether 32- or 64-bit.
|
||
|
|
- Needs very little CPU time to run (written in C).
|
||
|
|
- System statistics collected by sar/sadc can be saved in a file for future inspection. You can configure the length of data history to keep.
|
||
|
|
There is no limit for this history length but the available space on your storage device.
|
||
|
|
- System statistics collected by sar/sadc can be exported in various different formats (CSV, XML, JSON, SVG, etc.). DTD and XML Schema documents
|
||
|
|
are included in sysstat package. JSON output format is also available for mpstat and iostat commands.
|
||
|
|
- iostat can display statistics for devices managed by drivers in userspace like spdk.
|
||
|
|
- Smart color output for easier statistics reading.
|
||
|
|
|
||
|
|
|
||
|
|
Sysstat is Open Source / Free Software, and is freely available under the GNU General Public License, version 2. The latest version of sysstat
|
||
|
|
can always be found on the web site at:
|
||
|
|
http://pagesperso-orange.fr/sebastien.godard/
|
||
|
|
|
||
|
|
See the CHANGES file to know the new features/improvements/bug fixes added in this release of sysstat. Sysstat development can be tracked on the
|
||
|
|
web site at: https://github.com/sysstat/sysstat
|
||
|
|
|
||
|
|
### Installation
|
||
|
|
|
||
|
|
### Install from openEuler
|
||
|
|
|
||
|
|
Enter:
|
||
|
|
|
||
|
|
$ sudo yum install sysstat
|
||
|
|
|
||
|
|
openEuler is a newer system. You may need to enable and start the sysstat service:
|
||
|
|
|
||
|
|
$ sudo systemctl enable sysstat
|
||
|
|
|
||
|
|
$ sudo systemctl start sysstat
|
||
|
|
|
||
|
|
### Install from Ubuntu
|
||
|
|
|
||
|
|
Enter:
|
||
|
|
|
||
|
|
$ sudo apt-get install sysstat
|
||
|
|
|
||
|
|
Then enable data collecting:
|
||
|
|
|
||
|
|
$ sudo vi /etc/default/sysstat
|
||
|
|
|
||
|
|
change ENABLED="false" to ENABLED="true"
|
||
|
|
|
||
|
|
save the file
|
||
|
|
|
||
|
|
Last, restart the sysstat service:
|
||
|
|
|
||
|
|
$ sudo service sysstat restart
|
||
|
|
|
||
|
|
### Install from sources
|
||
|
|
|
||
|
|
Clone sysstat public repository with:
|
||
|
|
|
||
|
|
$ git clone git://github.com/sysstat/sysstat
|
||
|
|
|
||
|
|
Then configure sysstat for your system:
|
||
|
|
|
||
|
|
$ cd sysstat
|
||
|
|
|
||
|
|
$ ./configure
|
||
|
|
|
||
|
|
You can set several variables and parameters on the command line. For example you can enter the following option to activate data
|
||
|
|
collecting (either using cron or systemd):
|
||
|
|
|
||
|
|
$ ./configure --enable-install-cron
|
||
|
|
|
||
|
|
Enter:
|
||
|
|
|
||
|
|
./configure --help to display all possible options.
|
||
|
|
|
||
|
|
Note: There is another way to configure sysstat instead of entering ./configure: This is the Interactive Configuration script (iconfig) which will
|
||
|
|
ask you for the value of the main sysstat variables and parameters. Enter ./iconfig then answer the questions or enter Return to accept the (sane)
|
||
|
|
default values. For yes/no questions, answer 'y' or 'n' (without the quotes): It is case sensitive! You can also enter '?' to get a help message
|
||
|
|
that will explain the meaning of each variable or parameter.
|
||
|
|
|
||
|
|
Compile and install:
|
||
|
|
|
||
|
|
$ make
|
||
|
|
|
||
|
|
$ sudo make install
|
||
|
|
|
||
|
|
### Support sysstat!
|
||
|
|
|
||
|
|
If you are reading this README file then you are probably about to use the sysstat tools to help you monitor your system and maybe troubleshoot
|
||
|
|
some performance issues. Good choice. Sysstat is made for you. Moreover sysstat is free software and always will be.
|