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From Dave Gardner <dave.gard...@imagini.net>
Subject Re: Dazed and confused with Cassandra on EC2 ...
Date Mon, 20 Sep 2010 16:55:45 GMT
Nope - no swap enabled.


top - 16:53:14 up 12 days,  6:11,  3 users,  load average: 1.99, 2.63, 5.03
Tasks: 133 total,   1 running, 132 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
0.0%st
Mem:  35840228k total, 33077580k used,  2762648k free,   263388k buffers
Swap:        0k total,        0k used,        0k free, 29156108k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  SWAP
COMMAND

 3398 root      20   0  203g 1.2g 186m S    0  3.5  5124095h 202g
jsvc

 4162 hadoop    20   0 9095m  84m 9544 S    0  0.2  5124095h 8.8g
java

32153 hadoop    20   0 9057m 154m 9416 S    0  0.4  5124095h 8.7g
java

18091 hadoop    20   0 9257m 561m 9460 S    0  1.6 17232821w 8.5g
java

 4267 hadoop    20   0 2400m  85m 9404 S    0  0.2  5124095h 2.3g
java

 4289 hadoop    20   0 2337m  78m 9348 S    0  0.2   0:01.44 2.2g
java






On 20 September 2010 17:48, Peter Schuller <peter.schuller@infidyne.com>wrote:

> > Can anyone help shed any light on why this might be happening? We've
> tried a
> > variety of JVM settings to alleviate this; currently with no luck.
>
> Extremely long ParNew (young generations) pause times are almost
> always due to swapping. Are you swapping?
>
> --
> / Peter Schuller
>

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