Title : Manage ”nice” priority of daemons on OpenBSD Author: Solène Date : 11 September 2018 Tags : openbsd66 openbsd highlight Following a discussion on the OpenBSD mailing list *misc*, today I will write about how to manage the priority (as in nice priority) of your daemons or services. In man page [rc(8)](http://man.openbsd.org/rc), one can read: Before init(8) starts rc, it sets the process priority, umask, and resource limits according to the “daemon” login class as described in login.conf(5). It then starts rc and attempts to execute the sequence of commands therein. Using **/etc/login.conf** we can manage some limits for services and daemon, using their rc script name. For example, to make **jenkins** at lowest priority (so it doesn't make troubles if it builds), using this line will set it to nice 20. jenkins:priority=20 If you have a file **/etc/login.conf.db** you have to update it from **/etc/login.conf** using the software `cap_mkdb`. This creates a hashed database for faster information retrieval when this file is big. By default, that file doesn't exist and you don't have to run `cap_mkdb`. See [login.conf(5)](http://man.openbsd.org/login.conf) for more informations.