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| From | Senthilvel Rangaswamy <senthil...@gmail.com> |
| Subject | one node with very high loads |
| Date | Mon, 27 Aug 2012 16:25:04 GMT |
We are running 1.1.2 on m1.xlarge with ephemeral store for data. We are
seeing very high loads on one
of the nodes in the ring, 30+.
The node is not doing any compaction, or streaming. Yet, there seems to be
lot of disk i/o activity. What
could be the reason ? If it is high reads, I expect it to be across the
cluster.
cassandra]$ nodetool tpstats
Pool Name Active Pending Completed Blocked All
time blocked
ReadStage 32 72 44327505
0 0
RequestResponseStage 0 0 168321146
0 0
MutationStage 32 588 109240939
0 0
ReadRepairStage 0 0 3264320
0 0
ReplicateOnWriteStage 8 8 20080122
0 0
GossipStage 0 0 1617877
0 0
AntiEntropyStage 0 0 14
0 0
MigrationStage 0 0 7
0 0
MemtablePostFlusher 0 0 1432
0 0
StreamStage 0 0 8
0 0
FlushWriter 0 0 1432
0 0
MiscStage 0 0 0
0 0
commitlog_archiver 0 0 0
0 0
AntiEntropySessions 0 0 0
0 0
InternalResponseStage 0 0 3
0 0
HintedHandoff 0 0 1169
0 0
Message type Dropped
RANGE_SLICE 0
READ_REPAIR 227246
BINARY 0
READ 6743268
MUTATION 10662391
REQUEST_RESPONSE 35
--
..Senthil
"If there's anything more important than my ego around, I want it
caught and shot now."
- Douglas Adams.
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