Re: computer freezes

One thing that helped us was going to the *_gif extension files which don't spawn the additional processes. Improved our workload significantly.


Mike Voss wrote:
I have had the same thing happen to me occasionally with a machine doing the same kind of processing. What ends up hanging up my machine is hung Gempak processes, which show up as a process "gf" . You can diagnose this by checking for hung processes after the machine has been up for awhile with "ps -ef | grep gf", or you can check for memory that is occupied by these processes with the "ipcs" command.

It may be necessary to use the "cleanup" script in Gempak...........maybe use it in cron or at the end of your scripts. These prevents these hung processes from eventually bringing your machine down.

Hope that helps some,


At 10:00 AM 4/25/2005, Gabe Langbauer wrote:

Hello All,

I'm running a Dell Xeon processor with RedHat enterprise linux v. 3
installed. This system is used only for retriving data from ldm (6.1.0),
creating images with gempak (5.7.3) and displaying these images over the
web via apache. (also 1 java script).  Recently, the computer has been
locking up.  The symptoms are simply the computer becomes unreachable.
Even locally, if I go to the computer, it does not respond.  I am forced
then to cycle the power in order to get the system to once again respond.
Checking the system log files hasn't shown anything (at least to me)
except that when this lockup occurs, the cron does not run (usually).  If
anyone has any ideas as to what may be occuring it would be GREATLY

--Gabe Langbauer

Mike Voss
Department of Meteorology
San Jose State University
One Washington Square
San Jose, CA 95192-0104

408.924.5204 voice
408.924.5191 fax

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