Automatically kill process that consume too much memory or stall on linux

For the first requirement, you might want to look into either using ulimit, or tweaking the kernel OOM-killer settings on your system.

Monitoring daemons exist for this sort of thing as well. God is a recent example.

I wrote a script that runs as a cron job and can be customized to kill problem processes:

#!/usr/local/bin/perluse strict;use warnings;use Proc::ProcessTable;my $table = Proc::ProcessTable->new;for my $process (@{$table->table}) {    # skip root processes    next if $process->uid == 0 or $process->gid == 0;    # skip anything other than Passenger application processes    #next unless $process->fname eq 'ruby' and $process->cmndline =~ /\bRails\b/;    # skip any using less than 1 GiB    next if $process->rss < 1_073_741_824;    # document the slaughter    (my $cmd = $process->cmndline) =~ s/\s+\z//;    print "Killing process: pid=", $process->pid, " uid=", $process->uid, " rss=", $process->rss, " fname=", $process->fname, " cmndline=", $cmd, "\n";    # try first to terminate process politely    kill 15, $process->pid;    # wait a little, then kill ruthlessly if it's still around    sleep 5;    kill 9, $process->pid;}

https://www.endpointdev.com/blog/2012/08/automatically-kill-process-using-too/

To limit memory usage of processes, check /etc/security/limits.conf