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Full Discussion: Test command
Top Forums Shell Programming and Scripting Test command Post 302399076 by methyl on Friday 26th of February 2010 07:55:48 AM
Old 02-26-2010
The syntax for "ps" varies, as does the output. Please post which Operating System you have.

Btw. When you have multiple CPUs the percentage from "ps" is a percentage of one CPU. Thus a single process could run at 100% CPU without having any adverse effect. The more CPUs you fit to the computer the more likely you are to see processes with a very high CPU percentage.

Detecting a looping process is a fine art and I don't think that a single snapshot of the CPU percentage is useful for deciding whether to kill a process. It is unlikely that you would come up with a single command line which would be safe to run in a commerical environment.

A perfectly sized and perfectly tuned computer would have everything running at 100% with no wait states.
 

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LEARN ABOUT CENTOS

mysql_zap

MYSQL_ZAP(1)						       MySQL Database System						      MYSQL_ZAP(1)

NAME

       mysql_zap - kill processes that match a pattern

SYNOPSIS

       mysql_zap [-signal] [-?Ift] pattern

DESCRIPTION

       mysql_zap kills processes that match a pattern. It uses the ps command and Unix signals, so it runs on Unix and Unix-like systems.

       Invoke mysql_zap like this:

	   shell> mysql_zap [-signal] [-?Ift] pattern

       A process matches if its output line from the ps command contains the pattern. By default, mysql_zap asks for confirmation for each
       process. Respond y to kill the process, or q to exit mysql_zap. For any other response, mysql_zap does not attempt to kill the process.

       If the -signal option is given, it specifies the name or number of the signal to send to each process. Otherwise, mysql_zap tries first
       with TERM (signal 15) and then with KILL (signal 9).

       mysql_zap supports the following additional options:

       o   --help, -?, -I

	   Display a help message and exit.

       o   -f

	   Force mode.	mysql_zap attempts to kill each process without confirmation.

       o   -t

	   Test mode. Display information about each process but do not kill it.

COPYRIGHT

       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.

       This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
       published by the Free Software Foundation; version 2 of the License.

       This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO

       For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
       at http://dev.mysql.com/doc/.

AUTHOR

       Sun Microsystems, Inc. (http://www.mysql.com/).

MySQL 5.1							    04/06/2010							      MYSQL_ZAP(1)
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