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From Mark Thomas <ma...@apache.org>
Subject Re: cpu spike after upgrade from tomcat 6.0.36 to tomcat 7.0.57
Date Tue, 18 Aug 2015 15:57:09 GMT
On 18/08/2015 16:50, musafir wrote:
> Hello, ugraded tomcat from 6.0.36(jdk 6) to tomcat7.0.57  (jdk7)..
> os:centos 6.6 ...seeing high cpu spike after upgrade.... doing top
> and  thread dump shows  only thread that is always using cpu is:

How have you matched the thread using CPU in top with the thread in the
thread dump?

Mark


>  "ContainerBackgroundProcessor[StandardEngine[Catalina]]" daemon
> prio=10 tid=0x00007ff8fc599800 nid=0xc1d2e waiting on condition
> [0x00007ff803ffe000]
>    java.lang.Thread.State: TIMED_WAITING (sleeping)
>         at java.lang.Thread.sleep(Native Method)
>         at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1513)
>         at java.lang.Thread.run(Thread.java:745)
> 
> disabled  backgroundProcessorDelay (backgroundProcessorDelay=-1)
> ..don't see any thread that is always using cpu..
> 
> Q: why backgroundProcessorDelay will cause cpu spike. Is this disabled
> in tomcat6 by default?
> Q: will  disabling backgroundProcessorDelay cause any other
> performance issues with tomcat7.
> 
> 
> Thanks for Help!!
> 
> Regards
> 


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