I'm running random scan and put performance test at the same time, found that put performance descend a lot. Don't know why. Looking into the logs, found that "Block cache LRU eviction" occured almost once per second. But it only last about 10 ms, so, will it bring so much influence to put performance? And how to improve it?
hbase-root-regionserver-c3s5.log.2011-04-19:2011-04-19 21:00:00,067 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 163.35 MB of total=1.36 GB hbase-root-regionserver-c3s5.log.2011-04-19:2011-04-19 21:00:00,081 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=163.39 MB, total=1.2 GB, single=973.98 MB, multi=400.97 MB, memory=0 KB Zhou Shuaifeng(Frank)
