Database monitoring system
作者： Vivek Narasayya , Arnd Christian Konig , Surajit Chaudhuri
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摘要: A framework is provided within a database system for specifying monitoring rules that will be evaluated as part of the execution code path events being monitored. The occurrence selected event triggers rule evaluates some parameter an object related to against condition in rule. If met, specified action taken can alter or performance. Lightweight aggregation tables are utilized enable values so presently occurring compared summary from previously events. Signatures assigned queries based on structure query plan information lightweight grouped according signature.
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