Home > ORA-XXX, Uncategorized > ORA-00603: ORACLE server session terminated by fatal error

ORA-00603: ORACLE server session terminated by fatal error

Symptoms

  1. JDBC Client reported connection failure happened
  2. DB alert showed below errors at time the connection failure happened

mtype: 61 process 14042 failed because of a resource problem in the OS. The OS has most likely run out of buffers (rval: 4)
Errors in file /u02/oradiag/diag/rdbms/roamprd/roamprd1/trace/roamprd1_ora_14042.trc  (incident=29338):
ORA-00603: ORACLE server session terminated by fatal error
ORA-27504: IPC error creating OSD context
ORA-27300: OS system dependent operation:sendmsg failed with status: 105
ORA-27301: OS failure message: No buffer space available
ORA-27302: failure occurred at: sskgxpsnd2
opiodr aborting process unknown ospid (14042) as a result of ORA-603
2017-03-12 05:34:31.770000 +08:00
Sweep [inc][29338]: completed

Cause

High value of MTU for loop back adapter  on UEK3 causes the issue.

Fix

  1. Change loop back adapter MTU size

ifconfig lo mtu 16436

  1. Add MTU=16436 to /etc/sysconfig/network-scripts/ifcfg-lo
  2. Set vm.min_free_kbytes=32768 (32M)

 

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Categories: ORA-XXX, Uncategorized
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