Slow down IO heavy process

slow () { [ -n $1 ] && while ps -p $1 >/dev/null ; do kill -STOP $1; sleep 1; kill -CONT $1; sleep 1; done & }
Some IO intensive process make the system unresponsive. This function periodically starts/stops a process, which hopefully releases some resources for other activities. This function is useful when ionice is not available
Sample Output
bash> cp /tmp/BIG /tmp/2 & slow $!
[1] 26494
[2] 26495

1
By: igorfu
2012-05-16 12:13:30

1 Alternatives + Submit Alt

  • compare to alternative : - directly tests the -STOP of the process to continue or stop loop, - background operator should be set (or not) at the call of the function For extension i suggest a slowPID() based on kill like above and a slowCMD based on killall.


    -1
    slow () { [ -n $1 ] && while kill -STOP $1; do sleep 1; kill -CONT $1; sleep 1; done }
    makidoko · 2012-05-16 19:16:50 0

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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