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ORA_o00n Process High CPU Usage in 11.2.0.2 (Doc ID 1459376.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 to 11.2.0.2.0 [Release 11.2]
Information in this document applies to any platform.

Symptoms

11.2.0.2 database on ASM, the ora_o00n process consumes high CPU: 

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND         
 
 2921 oracle    25   0 1715m  17m  15m R 99.5  0.1 658:32.91 ora_o001_trng

 

Call stack:  .. dbgtTrc_int ksvreceive kfncPoolCb ksvrdp opirip ..
 
Current Wait Stack:

     0: waiting for 'class slave wait'
        slave id=0x0, =0x0, =0x0
        wait_id=139 seq_num=140 snap_id=1
        wait times: snap=358705 min 17 sec, exc=358705 min 17 sec, total=358705 min 17 sec

 

Cause

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