Yes, It seems like that CMS is better. I have tried G1 as databricks' blog recommended, but it's too slow.

------------------ 原始邮件 ------------------
发件人: "condor join";<>;
发送时间: 2016年5月30日(星期一) 上午10:17
收件人: "Ted Yu"<>;
抄送: ""<>;
主题: 答复: G1 GC takes too much time

The follwing are the parameters:

发件人: Ted Yu <>
发送时间: 2016年5月30日 9:47:05
收件人: condor join
主题: Re: G1 GC takes too much time
bq. It happens during the Reduce majority.

Did the above refer to reduce operation ?

Can you share your G1GC parameters (and heap size for workers) ?


On Sun, May 29, 2016 at 6:15 PM, condor join <> wrote:
my spark application failed due to take too much time during GC. Looking at the logs I found these things:
1.there are Young GC takes too much time,and not found Full GC happen this;
2.The time takes too much during the object copy;
3.It happened  more easily when there were not enough resources;
4.It happens during the Reduce majority.

have anyone met the same question?

To unsubscribe, e-mail:
For additional commands, e-mail: