For Version 11.2+ there is a new VM variable:
pf.controller.threadpool.min.size=3
Minimum number of workers in thread pool for scheduled tasks. The thread pool automatically extends if more workers are required to complete all tasks in a timely manner. The number of expected threads (active+idle) should average at 20 with peaks up to 1000 (e.g. during start).
For Version 10.6. there is a new VM variable:
pf.controller.threadpool.size=10
Fixed number of workers in thread pool for scheduled tasks (client)
pf.controller.threadpool.server.size=100
Fixed number of workers in thread pool for scheduled tasks (server)
To be used as command line option, e.g. -Dpf.controller.threadpool.server.size=50 in PowerFolder-Server.sh start script.
Scheduled threadpool status: Currently active threads 850/850