The present invention concerns a system (1) for handling performance issues of a production Complex Event Processing, CEP, system (2) during runtime, wherein the production CEP system (2) comprises at least one event source, at least one continuous query and at least one event sink, wherein the system (1) comprises: a. at least one monitoring sensor adapted for producing a stream of status events relating to the production CEP system (2); and b. a monitoring CEP system (10) adapted for executing at least one continuous analysis query on the stream of status events to produce a stream of monitoring events, wherein the stream of monitoring events indicates performance issues of the production CEP system (2) relating to the throughput, the latency, and/or the memory consumption of the production CEP system (2).
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