On Tue, 2005-08-23 at 19:58 -0700, Chris wrote:
> Is there a way to globally force a lower priority ('nice' level) on a
> specific binary executable, that technically can be called from any cgi-bin
> directory on a single server, where each copy is owned by a different
> hosting user? The filename is unique so we can assume any requests to this
> same filename are for the same binary file. I'd like to experiment with
> re-nicing a particular hosted application that at times creates such
> incredibly high CPU loads that everything else stops responding (httpd,
> sshd, etc) and you can't even log on to kill these processes. This
> typically requires a hard reboot to get things working again. Because of
> that I implemented scripts that monitor server load and when things get
> hairy (server loads exceeding 100+) they stop certain services to give this
> particular app a chance to exit gracefully, which works for the most part.
> But it can still take 60-120+ seconds at this type of loads to do anything.
> Would be nice to run this particular app, many copies of it that is, at
> lower nice level so we can at least SSH to the server when the load gets
> this high. I'd rather have my scripts send me an SMS message when things
> get hairy but be able to log on via SSH and at least manually control this
> app at that point, rather than mucking with other services to free up
> resources.
How about renaming the binary to something else and putting in place a
wrapper script calling nice and the re-named binary?
This way it always runs at some nice value.
--
Karl Latiss <karl.latiss@xxxxxxxxxxxxx>
Atvert Systems
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