severity 484349 wishlist tag 484349 wontfix thanks Hi Folkert,
Folkert van Heusden wrote:
> cron: should have a load-limit making it not run when a certain load has
> reached
>
> e.g. when the load reaches 20, don't run anymore cron-jobs. this is
> helpfull if the system is already having a hard time due to a dos or so.
a general load limit is definitely out-of-the-question. To give you a
simple example why, suppose the administrator has a cron job that checks
the load every minute and sends out an alert if it reached 25. The
proposed solution would actually have become a problem.
Without going into any details, a "smarter" approach -- eg specifying
load limits per job -- would be too much of an effort.
A possible solution for the situation you describe would be to preceed
your commands with the following test (for a load of 20.00):
[ $(awk '{print $1}' /proc/loadavg | tr -d '.') -le 2000 ] || your-job
Christian
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