On 18/08/2015 17:10, musafir wrote: > On Tue, Aug 18, 2015 at 11:57 AM, Mark Thomas <ma...@apache.org> wrote: > >> 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 >>> >> >> Hi Mark >> pid java >> >> top -H -p pid for thread id cpu eating thread >> >> kill -3 pid for thread dump >> >> and hexa nid for thread id
Then it looks like you did something wrong because the thread you identified is sleeping. It won't be using any CPU. Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
