Application monitoring in a stream database environment

1. A method for managing a stream application, the stream application composed from a plurality of processing elements executing on one or more compute nodes, the method comprising:

generating a graphical user interface display presenting at least a portion of an operator graph defining a structure of the stream application, wherein the operator graph represents the plurality of processing elements, and links between processing elements, corresponding to a flow of data tuples through the stream application, wherein the processing state includes a current tuple processing rate for at least one processing element;

monitoring, by operation of an application executed on a processor, user interactions with the presentation of the portion of the operator graph on the graphical user interface display;

identifying at least a first modification to the stream application based on a processing state of the stream application and the monitored user interactions, wherein the first modification comprises modifying a logging level of at least one of the processing elements; and

implementing the modification to the stream application.

2. The method of claim 1 , wherein the first modification to the stream application comprises adjusting the computing resources made available to one of the processing elements in the stream application.

3. The method of claim 1 , wherein the monitored user interactions include monitoring a log file associated with a processing element accessed through the graphical user interface.

4. The method of claim 1 , wherein the current processing rate is compared to a historical processing rate for the at least one processing element.

5. The method of claim 1 , wherein the first modification to the stream application comprises at least one of an adjustment to an operator in one of the processing elements, fusing two or more processing elements, separating a first processing element into to two or more processing elements, and cloning one of the processing elements; and wherein the method further comprises, updating the graphical user interface display presenting the portion of the operator graph to reflect the first modification.

6. The method of claim 1 , further comprising:

prior to implementing the first modification to the stream application, issuing a prompt to accept the first modification.

7. A non-transitory computer-readable storage medium containing a program which, when executed, performs an operation of monitoring a stream application, the stream application composed from a plurality of processing elements executing on one or more compute nodes, the operation comprising:

generating a graphical user interface display presenting a user with at least a portion of an operator graph defining a structure of the stream application, wherein the operator graph represents the plurality of processing elements, and links between processing elements, corresponding to a flow of data tuples through the stream application, wherein the processing state includes a current tuple processing rate for at least one processing element;

monitoring user interactions with the presentation of the portion of the operator graph on the graphical user interface display;

identifying at least a first modification to the stream application based on a processing state of the stream application and the monitored user interactions, wherein the first modification comprises modifying a logging level of at least one of the processing elements; and

implementing the modification to the stream application.

8. The computer-readable storage medium of claim 7 , wherein the first modification to the stream application further comprises adjusting the computing resources made available to one of the processing elements in the stream application.

9. The computer-readable storage medium of claim 7 , wherein the monitored user interactions include monitoring a log file associated with a processing element accessed through the graphical user interface.

10. The computer-readable storage medium of claim 7 , wherein the first modification to the stream application further comprises at least one of an adjustment to an operator in one of the processing elements, fusing two or more processing elements, separating a first processing element into to two or more processing elements, and cloning one of the processing elements; and wherein the method further comprises, updating the graphical user interface display presenting the portion of the operator graph to reflect the first modification.

11. The computer readable storage medium of claim 7 , wherein the operation further comprises:

prior to implementing the first modification to the stream application, issuing a prompt to accept the first modification.

12. A system, comprising:

a plurality of compute nodes, each comprising a processor and a memory, wherein the compute nodes are configured to execute processing elements of a stream application; and

a management system comprising at least a processor and a memory, wherein the memory stores a monitoring application, which, when executed on the management system performs an operation for monitoring the stream application, the operation, comprising:

generating a graphical user interface display presenting a user with at least a portion of an operator graph defining a structure of the stream application, wherein the operator graph represents the plurality of processing elements, and links between processing elements, corresponding to a flow of data tuples through the stream application, wherein the processing state includes a current tuple processing rate for at least one processing element;

monitoring user interactions with the presentation of the portion of the operator graph on the graphical user interface display;

identifying at least a first modification to the stream application based on a processing state of the stream application and the monitored user interactions, wherein the first modification comprises modifying a logging level of at least one of the processing elements; and

implementing the modification to the stream application.

13. The system of claim 12 , wherein the first modification to the stream application further comprises adjusting the computing resources made available to one of the processing elements in the stream application.

14. The system of claim 12 , wherein the monitored user interactions include monitoring a log file associated with a processing element accessed through the graphical user interface.

15. The system of claim 12 , wherein the first modification to the stream application further comprises at least one of an adjustment to an operator in one of the processing elements, fusing two or more processing elements, separating a first processing element into to two or more processing elements, and cloning one of the processing elements; and wherein the method further comprises, updating the graphical user interface display presenting the portion of the operator graph to reflect the first modification.

16. The system of claim 12 , wherein the operation further comprises:

prior to implementing the first modification to the stream application, issuing a prompt to accept the first modification.