Systemd version 227 introduced a new unit file option, TasksMax, to limit the number of processes that a service can spawn at one time. Depending on the version, the default is either 512 or 4,915.
It is conceivable in a large cluster that Pacemaker could exceed this limit, so we are now recommending that users set TasksMax=infinity in the Pacemaker unit file if building from scratch, or in a local override if already deployed, to disable the limit. We are not setting TasksMax=infinity in the shipped unit file in the soon-to-be-released version 1.1.18 because older versions of systemd will log a warning about an "Unknown lvalue". However, we will set it in the 2.0.0 release, when we'll be making a number of behavioral changes. Particular OS distributions may have backported the TasksMax feature to an older version of systemd, and/or changed its default value. For example, in RHEL, TasksMax was backported as of RHEL 7.3, but the default was changed to infinity. -- Ken Gaillot <kgail...@redhat.com> _______________________________________________ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
