incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Nikolay Kоvshov <nkovs...@yandex.ru>
Subject Re: Cassandra 1.0 hangs during GC
Date Tue, 24 Jul 2012 08:04:07 GMT
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" <jwijgerd@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 <nkovshov@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" <aaron@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

Mime
View raw message