IBM AIX RISC System/6000 Error: 1: Not owner
SQL*Plus: Release 10.2.0.4.0 - Production on Mon Jun 9 14:32:37 2008
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
SQL> conn /as sysdba
Connected to an idle instance.
SQL> STARTUP
ORA-27126: unable to lock shared memory segment in core
IBM AIX RISC System/6000 Error: 1: Not owner
Changes
The Oracle Home binaries have been patched to 10.2.0.4.0.Cause
"oracle" user does not have the required OS capabilities. When
LOCK_SGA is set to TRUE in 10.2.0.4, "oracle" user must have OS large
pages capabilities.
Following command can be used to check "oracle" user capabilities
$ lsuser -a capabilities oracle
Solution
1. Add the CAP_BYPASS_RAC_VMM and CAP_PROPAGATE capabilities to "oracle" user
# chuser capabilities=CAP_BYPASS_RAC_VMM,CAP_PROPAGATE oracle
2. Configure the AIX large page pool by calculating the number of large pages required for the SGA:
num_of_large_pages = INT((total_SGA_size-1)/16MB)+1
3. Configure the number and size of large pages:
# vmo -p -o lgpg_regions=num_of_large_pages -o lgpg_size=16777216
這裡根據我設定SGA為4000M,進行
# vmo -p -o lgpg_regions=300 -o lgpg_size=16777216
調整後資料庫可以正常啟動
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