sa summarizes information about previously executed commands as
recorded in the
acct file. In addition, it condenses this data
savacct summary file, which contains the
number of times the command was called and the system resources used.
The information can also be summarized on a per-user basis;
will save this information into
If no arguments are specified,
sa will print information about
all of the commands in the
acct file. If command
names have unprintable characters, or are only called once,
will sort them into a group called
***other. Overall totals for
each field are gathered and printed with a blank command name.
If called with a file name as the last argument,
sa will use that
file instead of
sa will sort the output by sum of user and system
The output fields are labeled as follows:
Note that these column titles do not appear in the first row of the
table, but after each numeric entry (as units of measurement) in every
row. For example, you might see
79.29re, meaning 79.29 cpu
seconds of “real time.”
An asterisk will appear after the name of commands that forked but
The availability of these program options depends on your operating
system. In specific, the members that appear in the
of your system's process accounting header file (usually
determine which flags will be present. For example, if your system's
struct acct doesn't have the
ac_mem field, the installed
sa will not support the
In short, all of these flags may not be available on your machine.
sanot to sort those command names with unprintable characters and those used only once into the `
--thresholdoption, assume that all answers to interactive queries will be affirmative.
*ignore*will appear in this field.
y, add the command to the
saseparates statistics for a particular executable depending on whether or not that command forked. Therefore, GNU
salumps this information together unless this option is specified.
AHZshould be (in hertz). This option is useful if you are trying to view an
acctfile created on another machine which has the same byte order and file format as your current machine, but has a different value for
sa's version number.
sa's usage string and default locations of system files to standard output.
Note: if more than one sorting option is specified, the list will be sorted by the one specified last on the command line.
I haven't been able to test this on many different machines because the data files grow so big in a short time; our sysadmin would rather save the disk space.
Most versions of
sa that I've tested don't pay attention to flags
--sort-num-calls when printing
out commands when combined with the
--print-users flags. GNU
sa pays attention to these flags
if they are applicable.
The average memory use is stored as a short rather than a double, so we
suffer from round-off errors. GNU
sa uses double the whole way