Using ionice on Amazon Linux

Question

My cronjob consumes 100% cpu even using ionice. Did I do something wrong?

for db in ${databases}; do
  ionice -c 3 nice -19 mysqldump -h localhost...
  wait
done

PS. Amazon Linux

Is anything else vying for CPU during that time? Is this causing any performance problems? — EEAA, May 31 '13 at 05:16

score 2 · Accepted Answer · answered Jun 04 '13 at 14:20

You are setting nice and ionice priorities for mysqldump process which does not really consumes much, it only sends commands to mysqld process. You should lower priorities for mysqld or (much harder but much better way) setup a Mysql-slave server and make backups from it.

Using ionice on Amazon Linux

1 Answers1