Installed the control-flow extension and configured it in data_dir/controlflow.properties:
# Don't allow the execution of more than 50 requests total in parallel
ows.global=50
# Don't allow more than 10 GetMap in parallel
ows.wms.getmap=10
# Don't allow a single user to perform more than 10 requests in parallel
user=10
# Don't allow the execution of more than 8 tile requests in parallel
# (recommended 4 x cores)
ows.gwc=8
Installed the control-flow extension and configured it in
data_dir/controlflow.properties: