SA(8) BSD System Manager's Manual SA(8)
sa -- print system accounting statistics
sa [-abcdDfijkKlmnqrstu] [-v cutoff] [file ...]
The sa utility reports on, cleans up, and generally maintains system accounting files.
sa is able to condense the information in /var/account/acct into the summary files /var/account/savacct and /var/account/usracct, which con-
tain system statistics according to command name and login id, respectively. This condensation is desirable because on a large system,
/var/account/acct can grow by hundreds of blocks per day. The summary files are normally read before the accounting file, so that reports
include all available information.
If file names are supplied, they are read instead of /var/account/acct. After each file is read, if the summary files are being updated, an
updated summary will be saved to disk. Only one report is printed, after the last file is processed.
The labels used in the output indicate the following, except where otherwise specified by individual options:
avio Average number of I/O operations per execution
cp Sum of user and system time, in minutes
cpu Same as cp
k CPU-time averaged core usage, in 1k units
k*sec CPU storage integral, in 1k-core seconds
re Real time, in minutes
s System time, in minutes
tio Total number of I/O operations
u User time, in minutes
The options to sa are:
-a List all command names, including those containing unprintable characters and those used only once. By default, sa places all names
containing unprintable characters and those used only once under the name ``***other''.
-b If printing command statistics, sort output by the sum of user and system time divided by number of calls.
-c In addition to the number of calls and the user, system and real times for each command, print their percentage of the total over all
-d If printing command statistics, sort by the average number of disk I/O operations. If printing user statistics, print the average
number of disk I/O operations per user.
-D If printing command statistics, sort and print by the total number of disk I/O operations.
-f Force no interactive threshold comparison with the -v option.
-i Do not read in the summary files.
-j Instead of the total minutes per category, give seconds per call.
-k If printing command statistics, sort by the CPU-time average memory usage. If printing user statistics, print the CPU-time average
-K If printing command statistics, print and sort by the CPU-storage integral.
-l Separate system and user time; normally they are combined.
-m Print per-user statistics rather than per-command statistics.
-n Sort by number of calls.
-q Create no output other than error messages.
-r Reverse order of sort.
-s Truncate the accounting files when done and merge their data into the summary files.
-t For each command, report the ratio of real time to the sum of user and system CPU times. If the CPU time is too small to report,
``*ignore*'' appears in this field.
-u Superseding all other flags, for each entry in the accounting file, print the user ID, total seconds of CPU usage, total memory
usage, number of I/O operations performed, and command name.
For each command used cutoff times or fewer, print the command name and await a reply from the terminal. If the reply begins with
``y'', add the command to the category ``**junk**''. This flag is used to strip garbage from the report.
By default, per-command statistics will be printed. The number of calls, the total elapsed time in minutes, total CPU and user time in min-
utes, average number of I/O operations, and CPU-time averaged core usage will be printed. If the -m option is specified, per-user statistics
will be printed, including the user name, the number of commands invoked, total CPU time used (in minutes), total number of I/O operations,
and CPU storage integral for each user. If the -u option is specified, the uid, user and system time (in seconds), CPU storage integral, I/O
usage, and command name will be printed for each entry in the accounting data file.
If the -u flag is specified, all flags other than -q are ignored. If the -m flag is specified, only the -b, -d, -i, -k, -q, and -s flags are
The sa utility exits 0 on success, and >0 if an error occurs.
/var/account/acct raw accounting data file
/var/account/savacct per-command accounting summary database
/var/account/usracct per-user accounting summary database
lastcomm(1), acct(5), ac(8), accton(8)
sa was written for NetBSD 1.0 from the specification provided by various systems' manual pages. Its date of origin is unknown to the author.
Chris G. Demetriou <email@example.com>.
The number of options to this program is absurd, especially considering that there's not much logic behind their lettering.
The field labels should be more consistent.
NetBSD's VM system does not record the CPU storage integral.
While the behavior of the options in this version of sa was modeled after the original version, there are some intentional differences and
undoubtedly some unintentional ones as well. In particular, the -q option has been added, and the -m option now understands more options
than it used to.
The formats of the summary files created by this version of sa are very different than the those used by the original version. This is not
considered a problem, however, because the accounting record format has changed as well (since user ids are now 32 bits).
February 25, 1994 BSD