Event Monitor (EMON) Slave Process Constantly Consuming CPU (Doc ID 1603844.1)

Last updated on SEPTEMBER 29, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 12.1.0.2 [Release 11.2 to 12.1]
Information in this document applies to any platform.

Symptoms

Event Monitor (EMON) slave process is consuming CPU.

Multiple stacks from the process obtained via 

connect / as sysdba

oradebug setospid 1379

or use  the following to find EMON process

In 11g ps -ef | grep EMON

In 12c ps-ef |grep ennn


oradebug SHORT_STACK

have the form

Oracle pid: 43, Unix process pid: 1379, image: oracle@feltux3154 (E000)

_write()+10<-nttwr()+275<-nsntwrn()+111<-nspsend()+935<-nsdo()+4694<-nsfull_sd()+46<-kpcesend()+952<-kponsnd()+392<-kponepms()+1729<-kponprmsg()+405<-kponemn0()+597<-kponemn()+1152<-ksvrdp()+3653<-opirip()+901<-opidrv()+684<-sou2o()+87<-opimai_real()+280<-ssthrdmain()+295<-main()+203<-_start()+108

which indicates it is stuck in a network write.

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms