“Sar (Unix)”的意思、由来-开放百科全书

词条 Sar (Unix)

释义

Platform support
Syntax
Example
Sysstat package
See also
References
Footnotes

{{lowercase}}{{Infobox Software
|name = sar
|logo =
|caption =
|screenshot =
|screenshot size =
|developer =
|latest_release_version = sysstat 12.1.1^[1]
|latest_release_date = {{Release date and age|2018|10|13}}
| latest preview version = sysstat 11.7.4
| latest preview date = {{Start date and age|2018|06|01}} ^[2]
|operating_system = AIX, Linux, Solaris, HP-UX
|genre = System reporting
|license =
|programming_language= C
|repo = {{URL|https://github.com/sysstat/sysstat/}}
|website = {{URL|http://sebastien.godard.pagesperso-orange.fr//}}
}}System Activity Report (sar) is a Unix System V-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, interrupts, device load, network and swap space utilization. Sar uses /procfilesystem for gathering information ^[3]

Platform support

Sar was originally developed for Solaris operating system^[4] and it is available in Linux, Solaris, AIX, HP-UX, but it is not available for MacOS or FreeBSD, until 2013 there was a bsdsar tool actually deprecated ^[5].

Linux distributions, such as Red Hat Enterprise Linux and SuSe^[6] provide sar utility through the sysstat package.

Syntax

{{mono|-f}}: filename Uses filename as the data source for sar. The default is the current daily data file /var/adm/sa/sadd.

{{mono|-e}}: time Selects data up to time. The default is 18:00.

{{mono|-i}}: sec Selects data at intervals as close as possible to sec seconds.

Example

[user@localhost]$ sar # Displays current CPU activity.

Sysstat package

Additional to sar command, Linux sysstat package in Debian^[7], RedHat Enterprise Linux and SuSE provides additional reporting tools:

{{man|1|sar |die.net| Collect, report, or save system activity information.}}
{{man|8|sa1 |die.net| Collect and store binary data in the system activity daily data file.}}
{{man|8|sa2 |die.net| shell variant of sar, supporting the same flags as sar command which write a daily report in the /var/log/sa directory.}}
{{man/format|1|sadf|http://sebastien.godard.pagesperso-orange.fr/man_sadf.html|, similar to sar but can write its data in different formats (CSV, XML, etc.). This is useful to load performance data into a database, or import them in a spreadsheet to make graphs.}}
{{man|1|iostat|die.net|reports basic CPU statistics and input/output statistics for devices, partitions and network filesystems.}}
{{man|1|mpstat|die.net|reports individual or combined processor related statistics.}}
{{man|1|pidstat|die.net|reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc.}}
{{man|1|nfsiostat|die.net|reports input/output statistics for network filesystems (NFS).}}
{{man|1|cifsiostat|die.net| reports I/O statistics for CIFS resources.}}

References

{{man|1|sar|Solaris}}
Easy system monitoring with SAR (IBM developerWorks)
System Activity Reporter (Softpanorama)
Article on sar at Computerhope

Footnotes

1. ^https://github.com/sysstat/sysstat/releases/tag/v12.1.1
2. ^http://sebastien.godard.pagesperso-orange.fr/
3. ^http://sebastien.godard.pagesperso-orange.fr/man_sar.html
4. ^https://www.itworld.com/article/2786092/open-source-tools/unix-tip--using-sar-for-long-term-performance-analysis.html
5. ^https://www.freshports.org/sysutils/bsdsar
6. ^http://www.softpanorama.org/Admin/Monitoring/sar.shtml
7. ^https://packages.debian.org/sid/sysstat
8. ^{{cite web| url = https://www.filibeto.org/sun/lib/solaris2.5-docs/40.3/802-1930-01.pdf| title = sag(1)| date = 1993-02-24| work = SUNOS Reference Manual| publisher = Sun Microsystems| location = Mountain View, California| pages = 1–895| format = PDF| accessdate = 2010-05-04| quote = sag - system activity graph [...] DESCRIPTION sag graphically displays the system activity data stored in a binary data file by a previous sar(1) run.}}

3 : Job scheduling|Computer performance|System administration

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