Giuseppe’s Weblog

Sintomo: allo startup del database errore out of memory

SQL> startup
ORA-27102: out of memory
SVR4 Error: 22: Invalid argument
SQL> Disconnected

una volta verificato che oracle_home, oracle_sid etc … siano settati in modo corretto verificare che non si siano raggiunti i limiti di memoria massima concessi all’utente oracle.

Con la procedura seguente e’ possibile modificare provvisoriamente i parametri di sistema:

$ id -p
uid=60003(oracle) gid=203(oinstall) projid=100(user.oracle)
$ prctl -n project.max-shm-memory -i project user.oracle
project: 100: user.oracle
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
project.max-shm-memory
privileged      4.00GB      -   deny                                 -
system          16.0EB    max   deny                                 -

$ su -

# prctl -n project.max-shm-memory -v 6gb -r -i project user.oracle

# exit

$ prctl -n project.max-shm-memory -i project user.oracle      project: 100: user.oracle
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
project.max-shm-memory
privileged      6.00GB      -   deny                                 -
system          16.0EB    max   deny                                 -

$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.2.0 – Production on Mon Sep 15 08:43:06 2008

Copyright (c) 1982, 2005, Oracle.  All Rights Reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 1073741824 bytes
Fixed Size                  2132680 bytes
Variable Size             266171704 bytes
Database Buffers          801112064 bytes
Redo Buffers                4325376 bytes
Database mounted.
Database opened.
SQL>

Per modificare permanentemente tali parametri occorre aggiungere un nuovo progetto nel project file:

# cat /etc/project
system:0::::
user.root:1::::
noproject:2::::
default:3::::
group.staff:10::::


Per aggiungere un progetto usare il comando projadd, per modificarlo usare projmod:

# projadd -U oracle -K "project.max-shm-memory=(priv,6144MB,deny)" user.oracle
# projmod -s -K "project.max-sem-ids=(priv,256,deny)" user.oracle


Il project file dovrebbe apparire cosi’:

# cat /etc/project
system:0::::
user.root:1::::
noproject:2::::
default:3::::
group.staff:10::::
user.oracle:100::oracle::project.max-sem-ids=(priv,256,deny);project.max-shm-memory=(priv,6442450944,deny)