Incident (ORA-3137[12333]) detected. OR Async driver not configured : errno=13

Reasons:

Due to Async driver not configure, ORA-3137[12333] incident occur.  when incident occur Async driver permission like below: 

#ll  -l /dev/async

crw-r--r--   1 root       sys        101 0x000104 Aug  6  2015 /dev/async

Here:

Access permission(crw-r--r--): 644

user:  root

group: sys

Solution:

Step-1: Change Async driver permission like below:

Access Permission: 660

user:oracle

group: dba

# chown oracle:dba /dev/async

# ll /dev/async

crw-r--r--   1 oracle     dba        101 0x000104 Aug  6  2015 /dev/async

# chmod 660 /dev/async

#  ll /dev/async

crw-rw----   1 oracle     dba        101 0x000104 Aug  6  2015 /dev/async

Step-2: Change the value of max_async_ports. max_async_ports limits the maximum number of processes that can concurrently

use /dev/async. Set this parameter to the sum of  'processes' from init.ora + number of background processes. 

# kctune max_async_ports=5500

     ==> Update the automatic 'backup' configuration first? yes

       * The automatic 'backup' configuration has been updated.

       * Future operations will update the backup without prompting.

       * The requested changes have been applied to the currently

         running configuration.

Tunable                    Value  Expression  Changes

max_async_ports  (before)   4096  Default     Immed

                 (now)      5500  5500

# kctune max_async_ports

Tunable          Value  Expression  Changes

max_async_ports   5500  5500        Immed