Suse Linux UserTasksMax setting may need tuning

By means of the system setting UserTasksMax, Suse Linux limits the number of concurrent processes/threads per operating system user. In highly scaled up deployments, the server manager may encroach on the default value UserTasksMax=12,288. For example, a single TcServer process launched by the server manager can use up to six concurrent threads, and thus an installation configuration where PROCESS_MAX=2000 can consume up to 12,000 threads. In this case, if UserTasksMax is set to the default value 12,288, few threads are available for other processes started using the same user account that launched the server manager, resulting in abnormal behavior for processes that cannot acquire threads. In addition to the operating system limitation per user, several Linux distributions such as Suse Linux Enterprise Server use the systemd service, which has parameters to limit the concurrent number of processes and tasks. If the server manager is running in a systemd service, the default systemd configuration limits the amount of tcserver processes that can be started. To resolve this issue, update the following systemd settings: TasksMax The maximum number of tasks that can be created in the service. DefaultTasksMax The default tasks maximum set by the operating system.