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The occurrence of transaction failures is often unavoidable in most database processing environments and such failures can have a particularly detrimental effect on long-duration transactions. In this paper, the impact of failures on the performance of long-duration database transactions is studied, and results for the transaction response time and failure overhead are presented for general failure patterns, which include Poisson failures as a special case. It is found that the failure overheaddoi:10.1093/comjnl/38.6.471 fatcat:6afqlic2zncxznmt5xeqorigcm