add –single-transaction –quick to mysqldump line

mysqldump -u USER -p  --single-transaction --quick --lock-tables=false DATABASE | gzip > OUTPUT.gz

http://stackoverflow.com/questions/5666784/how-can-i-slow-down-a-mysql-dump-as-to-not-affect-current-load-on-the-server

http://dev.mysql.com/doc/refman/5.6/en/mysqldump.html