ORA-27300, ORA-27301, ORA-27302 on AIX
(Doc ID 1541121.1)
Last updated on MARCH 16, 2020
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
IBM AIX on POWER Systems (64-bit)
***Checked for relevance on 03-July-2017***
Received following errors in alert log:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
- AIX server became unusable.
- OS commands such as ps returns malloc or fork errors.
- Can not connect to the database
- Command line hangs
- There are many defunct kernel processes. Following OS command list any defunct processes:
# ps -ef | grep defunct
username 12610 1 0 - ? 0:00 <defunct>
- No Oracle or user process is using abnormal amount of memory.
Check if the biggest user of PGA memory is showing PGA_ALLOC_MEM in the 100s MBytes or higher and keep growing by running following query:
SET LINESIZE 120
SET PAGESIZE 120
COLUMN spid HEADING 'OSpid' FORMAT a8
COLUMN pid HEADING 'Orapid' FORMAT 999999
COLUMN sid HEADING 'Sess id' FORMAT 99999
COLUMN serial# HEADING 'Serial#' FORMAT 999999
COLUMN status HEADING 'Status' FORMAT a8
COLUMN pga_alloc_mem HEADING 'PGA alloc' FORMAT 99,999,999,999
COLUMN pga_used_mem HEADING 'PGA used' FORMAT 99,999,999,999
COLUMN username HEADING 'Oracle user' FORMAT a12
COLUMN osuser HEADING 'OS user' FORMAT a12
COLUMN program HEADING 'Program' FORMAT a20
FROM v$process p, v$session s
WHERE s.paddr( + ) = p.addr
ORDER BY p.pga_alloc_mem DESC;
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