EHCache Retrieval slow during heavy load

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We are trying to improve the performance of our system and thought Cache will help us. We used EHCache 2.4 and tried load testing. We started with just 2 elements in memory and ran the test which retrieves the same element concurrently. The cache retrieval time in some cases where more than 200-300 ms. The cache configuration we have is

<cache name="TEST_CACHE" maxElementsInMemory="5000" eternal="false"
        diskExpiryThreadIntervalSeconds="3600" memoryStoreEvictionPolicy="LFU"
        timeToIdleSeconds="86400" timeToLiveSeconds="86400">

    </cache>

Are we missing anything? Is this the expected?

asked 56 secs ago

user548871

41