48 G of Ram on that machine, swap is not used. I will disable swap at all just in case I have 4 cassandra processes (parts of 4 different clusters), each allocated 8 GB and using 4 of them
>java -version java version "1.7.0" Java(TM) SE Runtime Environment (build 1.7.0-b147) Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode) 23.07.2012, 20:12, "Joost van de Wijgerd" <jwijg...@gmail.com>: > Howmuch memory do you have on the machine. Seems like you have 8G > reserved for the Cassandra java process, If this is all the memory on > the machine you might be swapping. Also which jvm do you use? > > kind regards > > Joost > > On Mon, Jul 23, 2012 at 10:07 AM, Nikolay Kоvshov <nkovs...@yandex.ru> wrote: > >> 21th I have mirgated to cassandra 1.1.2 but see no improvement >> >> cat /var/log/cassandra/Earth1.log | grep "GC for" >> INFO [ScheduledTasks:1] 2012-05-22 17:42:48,445 GCInspector.java (line 123) >> GC for ParNew: 345 ms for 1 collections, 82451888 used; max is 8464105472 >> INFO [ScheduledTasks:1] 2012-05-23 02:47:13,911 GCInspector.java (line 123) >> GC for ParNew: 312 ms for 1 collections, 110617416 used; max is 8464105472 >> INFO [ScheduledTasks:1] 2012-05-23 11:57:54,317 GCInspector.java (line 123) >> GC for ParNew: 298 ms for 1 collections, 98161920 used; max is 8464105472 >> INFO [ScheduledTasks:1] 2012-07-02 08:52:37,019 GCInspector.java (line 123) >> GC for ParNew: 196886 ms for 1 collections, 2310058496 used; max is >> 8464105472 >> INFO [ScheduledTasks:1] 2012-07-16 17:41:25,940 GCInspector.java (line 123) >> GC for ParNew: 200146 ms for 1 collections, 2345987088 used; max is >> 8464105472 >> === Migrated from 1.0.0 to 1.1.2 >> INFO [ScheduledTasks:1] 2012-07-21 09:05:08,280 GCInspector.java (line 122) >> GC for ParNew: 282 ms for 1 collections, 466406864 used; max is 8464105472 >> INFO [ScheduledTasks:1] 2012-07-21 12:38:43,132 GCInspector.java (line 122) >> GC for ParNew: 233 ms for 1 collections, 405269504 used; max is 8464105472 >> INFO [ScheduledTasks:1] 2012-07-22 02:29:09,596 GCInspector.java (line 122) >> GC for ParNew: 253 ms for 1 collections, 389700768 used; max is 8464105472 >> INFO [ScheduledTasks:1] 2012-07-22 17:45:46,357 GCInspector.java (line 122) >> GC for ParNew: 57391 ms for 1 collections, 400083984 used; max is 8464105472 >> >> Memory and yaml memory-related settings are default >> I do not do deletes >> I have 2 CF's and no secondary indexes >> >> LiveRatio's: >> INFO [pool-1-thread-1] 2012-06-09 02:36:07,759 Memtable.java (line 177) >> CFS(Keyspace='Keyspace1', ColumnFamily='PSS') liveRatio is 1.0 (just-counted >> was 1.0). calculation took 85ms for 6236 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:47,614 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='Standard1') liveRatio is 1.0 >> (just-counted was 1.0). calculation took 8ms for 1 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:51,012 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='PSS') liveRatio is 1.0 (just-counted >> was 1.0). calculation took 99ms for 1094 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:51,331 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='Standard1') liveRatio is 1.0 >> (just-counted was 1.0). calculation took 80ms for 242 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:51,856 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='PSS') liveRatio is 1.0 (just-counted >> was 1.0). calculation took 505ms for 2678 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:52,881 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='PSS') liveRatio is 1.0 (just-counted >> was 1.0). calculation took 776ms for 5236 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:52,945 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='Standard1') liveRatio is 1.0 >> (just-counted was 1.0). calculation took 64ms for 389 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:55,162 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='PSS') liveRatio is 1.0 (just-counted >> was 1.0). calculation took 1378ms for 8948 columns >> INFO [MemoryMeter:1] 2012-07-21 09:04:55,304 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='Standard1') liveRatio is 1.0 >> (just-counted was 1.0). calculation took 140ms for 1082 columns >> INFO [MemoryMeter:1] 2012-07-21 09:05:08,439 Memtable.java (line 213) >> CFS(Keyspace='Keyspace1', ColumnFamily='Standard1') liveRatio is >> 2.5763038186160894 (just-counted was 2.5763038186160894). calculation took >> 8796ms for 102193 columns >> >> 18.07.2012, 07:51, "aaron morton" <aa...@thelastpickle.com>: >>> Assuming all the memory and yaml settings default that does not sound >>> right. The first thought would be the memory meter not counting correctly... >>> Do you do a lot of deletes ? >>> Do you have a lot of CF's and/or secondary indexes ? >>> Can you see log lines about the "liveRatio" for your cf's ? >>> I would upgrade to 1.0.10 before getting too carried away though. >>> Cheers >>> >>> ----------------- >>> Aaron Morton >>> Freelance Developer >>> @aaronmorton >>> http://www.thelastpickle.com >>> >>> On 17/07/2012, at 8:14 PM, Nikolay Kоvshov wrote: >>>> This is a cluster of 2 nodes, each having 8G of operating memory, >>>> replicationfactor=2 >>>> Write/read pressure is quite low and almost never exceeds 10/second >>>> >>>> From time to time (2-3 times in a month) I see GC activity in logs and >>>> for this time cassandra stops responding to requests which results in a >>>> timeout in upper-layer application. Total time of unavailability can be >>>> over 5 minues (like in the following case) >>>> >>>> What can I do with that? Wiil it become much worse when my cluster grows >>>> up? >>>> >>>> INFO [GossipTasks:1] 2012-07-16 13:10:50,055 Gossiper.java (line 736) >>>> InetAddress /10.220.50.9 is now dead. >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,056 GCInspector.java (line >>>> 123) GC for ParNew: 391383 ms for 1 collections, 2025808488 used; max is >>>> 8464105472 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,067 StatusLogger.java (line >>>> 50) Pool Name Active Pending Blocked >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,071 StatusLogger.java (line >>>> 65) ReadStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,071 StatusLogger.java (line >>>> 65) RequestResponseStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,072 StatusLogger.java (line >>>> 65) ReadRepairStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,072 StatusLogger.java (line >>>> 65) MutationStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,073 StatusLogger.java (line >>>> 65) ReplicateOnWriteStage 0 0 0 >>>> INFO [GossipStage:1] 2012-07-16 13:10:50,074 Gossiper.java (line 722) >>>> InetAddress /10.220.50.9 is now UP >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,075 StatusLogger.java (line >>>> 65) GossipStage 1 59 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,075 StatusLogger.java (line >>>> 65) AntiEntropyStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,076 StatusLogger.java (line >>>> 65) MigrationStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,076 StatusLogger.java (line >>>> 65) StreamStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,077 StatusLogger.java (line >>>> 65) MemtablePostFlusher 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,077 StatusLogger.java (line >>>> 65) FlushWriter 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,077 StatusLogger.java (line >>>> 65) MiscStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,078 StatusLogger.java (line >>>> 65) InternalResponseStage 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,078 StatusLogger.java (line >>>> 65) HintedHandoff 0 0 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,079 StatusLogger.java (line >>>> 69) CompactionManager n/a 0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,079 StatusLogger.java (line >>>> 81) MessagingService n/a 0,0 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,080 StatusLogger.java (line >>>> 85) ColumnFamily Memtable ops,data Row cache size/cap Key >>>> cache size/cap >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,080 StatusLogger.java (line >>>> 88) Keyspace1.PSS 36712,343842617 0/0 >>>> 97995/1000000 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,085 StatusLogger.java (line >>>> 88) Keyspace1.Standard1 128679,162567721 0/0 >>>> 0/1000000 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,085 StatusLogger.java (line >>>> 88) system.NodeIdInfo 0,0 0/0 >>>> 0/1 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,086 StatusLogger.java (line >>>> 88) system.IndexInfo 0,0 0/0 >>>> 0/1 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,086 StatusLogger.java (line >>>> 88) system.LocationInfo 0,0 0/0 >>>> 1/2 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,086 StatusLogger.java (line >>>> 88) system.Migrations 0,0 0/0 >>>> 3/3 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,087 StatusLogger.java (line >>>> 88) system.HintsColumnFamily 1,528 0/0 >>>> 0/1 >>>> INFO [ScheduledTasks:1] 2012-07-16 13:10:50,087 StatusLogger.java (line >>>> 88) system.Schema 0,0 0/0 >>>> 2/3 >>>> -------- Завершение пересылаемого сообщения -------- > -- > Joost van de Wijgerd > Visseringstraat 21B > 1051KH Amsterdam > +31624111401 > joost.van.de.wijgerd@Skype > http://www.linkedin.com/in/jwijgerd
