SA1(8) Linux User's Manual SA1(8)
NAME
sa1 - Collect and store binary data in the system activity daily data
file.
SYNOPSIS
/usr/libexec/sysstat/sa1 [ --boot | --rotate [ iso ] | --sleep | inter-
val 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 stores binary data in the current standard system activity
daily data file.
The standard system activity daily data file is named saDD unless sadc's
option -D is used, in which case its name is saYYYYMMDD, where YYYY
stands for the current year, MM for the current month and DD for the
current day. By default it is located in the /var/log/sysstat directory.
The interval and count parameters specify that the record should be
written count times at interval seconds. If no arguments are given to
sa1 then a single record is written.
The sa1 command is designed to be started automatically by the cron com-
mand.
OPTIONS
--boot This option tells sa1 that the sadc command should be called
without specifying the interval and count parameters in order to
insert a dummy record, marking the time when the counters restart
from 0.
--rotate [ iso ]
Use this option to tell sa1 to insert a record of statistics to
the standard saDD system activity daily data file of the previous
day. This should be done shortly after midnight (on day DD+1) in
order to make sure that the data file covers the whole day, in-
cluding the last interval of time just before midnight. Adding
the iso keyword tells sa1 to use saYYYYMMDD instead of saDD as
the standard system activity daily data file name.
--sleep
This option tells sa1 that the sadc command should insert a com-
ment indicating that the system is entering or leaving sleep mode
(i.e. system suspend or hibernation).
EXAMPLE
To collect data (including those from disks) every 10 minutes, place the
following entry in your root crontab file:
0,10,20,30,40,50 * * * * /usr/libexec/sysstat/sa1 1 1 -S DISK
To rotate current system activity daily data file, ensuring it is com-
plete, place the following entry in your root crontab file:
0 0 * * * /usr/libexec/sysstat/sa1 --rotate
Debian note
The Debian sysstat package has already placed such an entry in your sys-
tem crontab. Please refer to the /usr/share/doc/sysstat/README.Debian
file for details.
FILES
/var/log/sysstat/saDD
/var/log/sysstat/saYYYYMMDD
The standard system activity daily data files and their default
location. YYYY stands for the current year, MM for the current
month and DD for the current day.
AUTHOR
Sebastien Godard (sysstat <at> orange.fr)
SEE ALSO
sar(1), sadc(8), sa2(8), sadf(1), sysstat(5)
https://github.com/sysstat/sysstat
https://sysstat.github.io/
Linux AUGUST 2023 SA1(8)
Generated by dwww version 1.16 on Sat Oct 3 05:39:16 CEST 2026.