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我正在使用cassandra 1.2.5，羣集中有4個節點。每個節點都是m1.large，系統內存爲8GB。對我們來說閱讀會更多。我的專欄中有5萬行。當我嘗試從該列系列讀取數據時，每次node3或node4 cpu使用率都很高。我爲此給出了下面的日誌。閱讀時CPU使用率變高
對於這個問題，我們可以將壓實策略設置爲LeveledCompactionStrategy，將sstable_size_in_mb設置爲10。這會有幫助嗎？
有沒有其他解決方案呢？
日誌：
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,660 StatusLogger.java (line 95) Cache Type Size Capacity KeysToSave Provider
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,660 StatusLogger.java (line 96) KeyCache 18523284 52428800 all
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,661 StatusLogger.java (line 102) RowCache 0 1073741824 all org.apache.cassandra.cache.SerializingCacheProvider
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,661 StatusLogger.java (line 109) ColumnFamily Memtable ops,data
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,661 StatusLogger.java (line 112) system.local 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,661 StatusLogger.java (line 112) system.peers 60,8040
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,662 StatusLogger.java (line 112) system.batchlog 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,671 StatusLogger.java (line 112) system.NodeIdInfo 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,671 StatusLogger.java (line 112) system.LocationInfo 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,671 StatusLogger.java (line 112) system.Schema 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,671 StatusLogger.java (line 112) system.Migrations 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,672 StatusLogger.java (line 112) system.schema_keyspaces 8,251
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,672 StatusLogger.java (line 112) system.schema_columns 332,21903
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,672 StatusLogger.java (line 112) system.schema_columnfamilies 352,21775
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,672 StatusLogger.java (line 112) system.IndexInfo 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,672 StatusLogger.java (line 112) system.range_xfers 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,673 StatusLogger.java (line 112) system.peer_events 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,673 StatusLogger.java (line 112) system.hints 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,673 StatusLogger.java (line 112) system.HintsColumnFamily 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,673 StatusLogger.java (line 112) GEN_GEN.feedserver_dependentFeeds 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,673 StatusLogger.java (line 112) GEN_GEN.feedserver_componentName 18648,1048576
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,674 StatusLogger.java (line 112) GEN_GEN.feedserver_FeedScheduler 128952,2097152
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,739 StatusLogger.java (line 112) GEN_GEN.feedserver_feedType 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,739 StatusLogger.java (line 112) GEN_GEN.feedserver_itemDef 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,739 StatusLogger.java (line 112) GEN_GEN.feedserver_Feed 66629,2097152
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,740 StatusLogger.java (line 112) system_auth.users 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,740 StatusLogger.java (line 112) OpsCenter.events 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,740 StatusLogger.java (line 112) OpsCenter.rollups60 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,740 StatusLogger.java (line 112) OpsCenter.settings 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,740 StatusLogger.java (line 112) OpsCenter.pdps 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,741 StatusLogger.java (line 112) OpsCenter.rollups86400 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,741 StatusLogger.java (line 112) OpsCenter.events_timeline 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,741 StatusLogger.java (line 112) OpsCenter.rollups300 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,741 StatusLogger.java (line 112) OpsCenter.rollups7200 0,0
INFO [ScheduledTasks:1] 2013-07-25 12:59:04,741 StatusLogger.java (line 112) system_traces.sessions 0,0