The following polling properties are in oware\lib\owmediation.properties. Increase them if you manage a network with more than 1000 printers. As with all properties, best practice is to override them (see Overriding Properties).
# Polling Engine Properties
# The properties below should be used for controlling the network bandwidth
# and managing the number of network entities.
# The property specifies a threshold limit, which if crossed will put the
# pending subscriptions on hold till the threshold is recovered.
# This property defines the max number of subscriptions in a time slot.
# This property defines the timeslot bandwidth.
# This property defines the thread pool size used for executing subscriptions.
# This property should be changed depending on the network entities to be polled.
These properties are relevant only if you have a printer driver installed.