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(2007 6月26日)解決:ORA-27102: out of memory

    在一台dell 2950 ,cpu 2.66 4核 × 2, 記憶體16G 上, RHEL 4.4 64位,oracle 10.2.0.3 64bit, 設定 sga_target > 6G 出錯。   SQL> startup ORA-27102: out of memory Linux-x86_64 Error: 12: Cannot allocate memory        檢查有幾個可能出現問題的地方:  

  1. sga_max_size
  2. Set shmall equal to shmmax divided by the page size.

    FYI: The page size can be seen using the following command:

    $ getconf PAGE_SIZE

  3. The "ulimit -l" parameter is not set to allow the amount of memory (sga size) being requested to be locked.

    oracle user execute: ulimit -l unlimited

    Refer to the "man" page for ulimit –l

       max locked memory       (kbytes, -l) unlimited

也可以修改 vi /etc/security/limits.conf 增加: *               soft    memlock         unlimited

*               hard    memlock         unlimited   * 也可修改為對應的安裝oracle 使用者   另外,需要檢查: cat /etc/sysctl.conf kernel.core_uses_pid = 1

kernel.shmmax=10737418240

kernel.sem=250 32000 100 128

# kernel.shmall=2500000

kernel.shmall=4194304