How can I kill the processes matching a grep older than 30 minutes?

Question

I have a set of processes that run in parallel.

Occasionally some hang around longer than the script is supposed to allow:

$time_start = microtime(true)
         


        

Answer 1

To obtain the list of processes named PROCESS_NAME which are running longer than 30 minutes you can issue the following awkcommand:

ps ax -ocmd,pid,etime | awk '/PROCESS_NAME/{split($(NF),a,":");if(a[1]>30)print}'

To obtain only the pids run

ps ax -ocmd,pid,etime | awk '/PROCESS_NAME/{split($(NF),a,":");if(a[1]>30)print $(NF-1)}'

You can pipe this to xargs kill, like this:

ps ax -ocmd,pid,etime | awk '/PROCESS_NAME/{split($(NF),a,":");if(a[1]>30)print $(NF-1)}' \
| xargs kill