Troubleshooting ORA-27154 ORA-27300 ORA-27301 ORA-27302

Troubleshooting ORA-27154 ORA-27300 ORA-27301 ORA-27302
这个错误是操作系统设置的问题，测试过程如下。
[oracle@gtlions ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.5.0 - Production on Sat Feb 4 23:47:02 2012

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.

Connected to an idle instance.

SQL> startup
ORA-27154: post/wait create failed
ORA-27300: OS system dependent operation:semget failed with status: 28
ORA-27301: OS failure message: No space left on device
ORA-27302: failure occurred at: sskgpsemsper
SQL> !oerr ora 27154
27154, 0000, "post/wait create failed"
// *Cause:  internal error, multiple post/wait creates attempted simultaneously
// *Action: check errno and contact Oracle Support

SQL>

[root@gtlions ~]# /sbin/sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 4294967295
kernel.shmall = 268435456
fs.aio-max-nr = 1048576
fs.file-max = 6815744
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
kernel.sem = 250  100

注意上面的最后一个参数kernel.sem = 250  100这个不正常的值，现在把这个参数该成正常值。

[root@gtlions ~]# vi /etc/sysctl.conf
[root@gtlions ~]# /sbin/sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 4294967295
kernel.shmall = 268435456
fs.aio-max-nr = 1048576
fs.file-max = 6815744
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
kernel.sem = 250 32000 100 128
[root@gtlions ~]#

来看下是否可以正常启动数据库了。
[oracle@gtlions ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.5.0 - Production on Sun Feb 5 00:00:39 2012

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area  167772160 bytes
Fixed Size            1272600 bytes
Variable Size           62915816 bytes
Database Buffers      100663296 bytes
Redo Buffers            2920448 bytes
Database mounted.
Database opened.
SQL>
吼吼，起来了！
-The End-