Abstract: A stream of tuples is processed by a stream application. The stream application includes a plurality of processing elements that operate on one or more compute nodes, each processing element includes one or more stream operators. One or more databases that are capable of communicating with the stream application are monitored during the processing of the stream of tuples. A potential performance condition of a first database of the one or more databases is detected based on the monitoring. An output adjustment is performed, in response to the potential performance condition.

Abstract: A two-for-one twisting spindle has a protective pot with an upper edge and a bobbin carrier positioned in the protective pot for receiving two bobbins to be placed atop one another. A thread inlet tube extends axially through the bobbin carrier for receiving a first and a second thread withdrawn overhead from the bobbins. A thread guide ring is rotatable about the axis of the spindle. The thread guide ring has an eye for guiding one of the first and second threads withdrawn from the bobbins to the thread inlet tube, wherein the other of the first and second threads is guided about the periphery of the thread guide ring. A bristle ring is connected to the upper edge of the protective pot, the bristle ring having radially inwardly oriented, elastic bristles along which bristles the threads pass before entering the thread inlet tube.