Sun Java 6 didn't help it at all Sar shows no special activity on the long GC times
And I have remembered that I do a lot of get_range_slices requests, each time on a range of 100, if this could be important. Still my GC times are growing incredible INFO [ScheduledTasks:1] 2012-07-25 12:17:04,029 GCInspector.java (line 122) GC for ParNew: 497253 ms for 1 collections, 114036128 used; max is 8464105472 INFO [ScheduledTasks:1] 2012-07-25 13:26:21,282 GCInspector.java (line 122) GC for ParNew: 149508 ms for 1 collections, 87015440 used; max is 8464105472 INFO [ScheduledTasks:1] 2012-07-25 18:39:44,654 GCInspector.java (line 122) GC for ParNew: 83584 ms for 1 collections, 54368032 used; max is 8464105472 INFO [ScheduledTasks:1] 2012-07-25 22:45:42,448 GCInspector.java (line 122) GC for ParNew: 48454 ms for 1 collections, 44072488 used; max is 8464105472 24.07.2012, 13:07, "Joost van de Wijgerd" <jwijg...@gmail.com>: > You are better off using Sun Java 6 to run Cassandra. In the past > there were issues reported on 7. Can you try running it on Sun Java 6? > > kind regards > > Joost > > On Tue, Jul 24, 2012 at 10:04 AM, Nikolay Kоvshov <nkovs...@yandex.ru> wrote: >> 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 > -- > Joost van de Wijgerd > Visseringstraat 21B > 1051KH Amsterdam > +31624111401 > joost.van.de.wijgerd@Skype > http://www.linkedin.com/in/jwijgerd -------- Завершение пересылаемого сообщения --------
