ORA-27302: failure occurred at: skgpspawn3

: Doc ID:Note:560309.1
Applies to:
OracleServer- Enterprise Edition - Version: 10.2.0.1 to 10.2.0.3
This problem can occur on any platform.

Symptoms
The database can not start up due to the following errors:

Errors in file…….trc:
……

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

……

Cause
This issue is mainly caused by lack of memory / swap. Checking the memory configuration on the server, we have found the following:

Total Physical Memory 38912 MB
Swap: Max Size 17664 MiB
So, RAM is 38 GB, SWAP space is only 17 GB

Solution
-We should increase the server swap space (paging space) . The general rule of thumb is that swap space should be:
RAM SWAP
1GB to 2GB 1.5 times RAM
> 2GB and <= 8GB 1 times RAM
> 8GB .75 times RAM

So in our case, the recommended swap space is @28 GB .

We can also try to increase physical memory, if possible.

We should also check the ulimits for Oracle user.:
memory - unlimited
data - unlimited
cpu - unlimited
stack - at least 32768
nofile - OS dependent

We should also check memory parameters in the pfile/spfile that add more load to the memory consumption on the server.In our issue, we found these settings which added more pressure to the memory:
-lock_sga=true
-large db_keep_cache_size=14000m.

f,检查服务器10.10.10.100上的物理内存

Total Physical Memory 8GB
Swap: 8GB
应该正常

g,检查交换空间

lsps –a

size 8GBused% 69%

h，使用smitty chps命令添加4GB交换空间，至此，客户端可以正常连接数据库