Abstract: Against the loosely coupled and dynamic configuration features of distributed systems,multi-objective monitoring resources allocation oriented at optimal monitoring interval selection was studied to achieve the balance between resources optimization and reliability maintenance．To propose the allocation model,first of all,the Markov chain theory was employed to analyze the reliability of systems under monitoring mechanism．Secondly,two different kinds of monitoring resources cost models were analyzed．On the top of that,a multi-objective monitoring resources allocation model was built under the system reliability constraint．This model chooses the appropriate monitoring rate for each component through minimizing the monitoring cost．Finally,a genetic algorithm was used to solve the allocation and optimization model．Experimental studies results prove the necessity and impact of monitoring resources allocation in reliability optimization．The results also show that monitoring resources allocation can help to achieve resources optimization and reliability maintenance．Comparing with single-objective resources allocation,multi-objective resources allocation approaches can get better optimization results．