02-08-2012
This entirely depends on the perspective the program is looking from. Not only free top, people found discrepancies among the outputs of sar -r, vmstat, ps aux.
But, as far as my knowledge goes, free command shows output using /proc/meminfo file. That's a direct output from kernel and ought to be more correct one.
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LEARN ABOUT REDHAT
safe_mysqld
SAFE_MYSQLD (1) mysql.com SAFE_MYSQLD (1)
NAME
safe_mysqld - start the mysqld daemon on Unix.
SYNOPSIS
safe_mysqld [--basedir=path] [--core-file-size=#] [--defaults-extra-file=path] [--defaults-file=path] [--open-files=#] [--datadir=path]
[--err-log=path] [--ledir=path] [--log=path] [--no-defaults] [--open-files=#] [--pid-file=path] [--port=#] [--socket=path] [--timezone=#]
[--user=#]
DESCRIPTION
safe_mysqld adds some safety features such as restarting the server when an error occurs and logging run-time information to a log file.
--basedir=path
--core-file-size=#
--defaults-extra-file=path
--defaults-file=path
--open-files=#
Size of the core file mysqld should be able to create. Passed to ulimit -c.
--datadir=path
--err-log=path
--ledir=path
Path to mysqld
--log=path
--no-defaults
--open-files=#
Number of files mysqld should be able to open. Passed to ulimit -n.
--pid-file=path
--port=#
--socket=path
--timezone=#
Set the timezone (the TZ) variable to the value of this parameter.
--user=#
NOTE
Note that all options on the command line to safe_mysqld are passed to mysqld. If you wants to use any options in safe_mysqld that mysqld
doesn't support, you must specify these in the option file.
SEE ALSO
isamchk (1), isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror
(1), replace (1), safe_mysqld (1), which1 (1), zap (1),
AUTHOR
Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se). This software comes with
no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer-
curmedia.com)
safe_mysqld (mysql) 19 December 2000 SAFE_MYSQLD (1)