Hi all, We have 5 nodes cluster(0.8.6), but the performance from one node is way behind others, I checked tpstats, It always show non-zero pending ReadStage, I don't see this problem on other nodes.
What caused the problem? I/O? Memory? Cpu usage is still low. How to fix this problem? ~/bin/nodetool -h localhost tpstats Pool Name Active Pending Completed Blocked All time blocked ReadStage 11 15 56960 0 0 RequestResponseStage 0 0 606695 0 0 MutationStage 0 0 538634 0 0 ReadRepairStage 0 0 199997 0 0 ReplicateOnWriteStage 0 0 0 0 0 GossipStage 0 0 5734 0 0 AntiEntropyStage 0 0 0 0 0 MigrationStage 0 0 0 0 0 MemtablePostFlusher 0 0 7 0 0 StreamStage 0 0 0 0 0 FlushWriter 0 0 8 0 0 MiscStage 0 0 0 0 0 FlushSorter 0 0 0 0 0 InternalResponseStage 0 0 0 0 0 HintedHandoff 1 4 0 0 0 Message type Dropped RANGE_SLICE 0 READ_REPAIR 0 BINARY 0 READ 9082 MUTATION 0 REQUEST_RESPONSE 0 Thanks you in advance. Daning
