Hello
Does anybody seen memory problems on idle cluster?
I have 8-node ring with cassandra 1.2.3 which never been used and stay
idle for several weeks. Yesterday when I decided to upgrade it to 1.2.4
I found lot of messages like
INFO 11:10:56,273 GC for ParNew: 1039 ms for 1 collections, 6631277912
used; max is 10630070272
INFO 11:10:56,273 Pool Name Active Pending Blocked
INFO 11:10:56,275 ReadStage 0 0 0
INFO 11:10:56,276 RequestResponseStage 0 0 0
INFO 11:10:56,276 ReadRepairStage 0 0 0
INFO 11:10:56,277 MutationStage 0 0 0
INFO 11:10:56,277 ReplicateOnWriteStage 0 0 0
INFO 11:10:56,278 GossipStage 0 0 0
INFO 11:10:56,278 AntiEntropyStage 0 0 0
INFO 11:10:56,278 MigrationStage 0 0 0
INFO 11:10:56,279 MemtablePostFlusher 0 0 0
INFO 11:10:56,279 FlushWriter 0 0 0
INFO 11:10:56,280 MiscStage 0 0 0
INFO 11:10:56,280 commitlog_archiver 0 0 0
INFO 11:10:56,280 InternalResponseStage 0 0 0
INFO 11:10:56,281 HintedHandoff 0 0 0
INFO 11:10:56,281 CompactionManager 0 0
INFO 11:10:56,281 MessagingService n/a 0,0
INFO 11:10:56,281 Cache Type Size
Capacity KeysToSave
Provider
INFO 11:10:56,281 KeyCache 7368
104857600 all
INFO 11:10:56,281 RowCache 0
0 all
org.apache.cassandra.cache.SerializingCacheProvider
INFO 11:10:56,281 ColumnFamily Memtable ops,data
INFO 11:10:56,281 system.local 4,52
INFO 11:10:56,281 system.peers 30,6093
INFO 11:10:56,282 system.batchlog 0,0
INFO 11:10:56,282 system.NodeIdInfo 0,0
INFO 11:10:56,282 system.LocationInfo 0,0
INFO 11:10:56,282 system.Schema 0,0
INFO 11:10:56,282 system.Migrations 0,0
INFO 11:10:56,282 system.schema_keyspaces 0,0
INFO 11:10:56,282 system.schema_columns 0,0
INFO 11:10:56,282 system.schema_columnfamilies 0,0
INFO 11:10:56,282 system.IndexInfo 0,0
INFO 11:10:56,282 system.range_xfers 0,0
INFO 11:10:56,282 system.peer_events 0,0
INFO 11:10:56,283 system.hints 0,0
INFO 11:10:56,283 system.HintsColumnFamily 0,0
INFO 11:10:56,283 system_auth.users 0,0
INFO 11:10:56,283 system_traces.sessions 0,0
INFO 11:10:56,283 system_traces.events 0,0
INFO 11:11:21,205 GC for ParNew: 1035 ms for 1 collections, 6633037168
used; max is 10630070272
So you can see - there is no any activity. And what I can see from the
java heap graph - it constantly grow. I plan to use this ring in prod,
but this strange behaviour confuses me.
