If you notice any one of these errors in Alert.log during startup then the issue is related to “aio-max-nr" kernel limit. You will see this error in 10.2.0.4
ORA-27090: Message 27090 not found; product=RDBMS; facility=ORA
ORA-27090: UNABLE TO RESERVE KERNEL RESOURCES FOR ASYNCHRONOUS DISK I/O
ORA-27090: Message 27090 not found; product=RDBMS; facility=ORA
Linux-x86_64 Error: 4: Interrupted system call
You will encounter this issue when the "aio-max-nr" kernel limit is too low.
Here is how you can check the value
#/sbin/sysctl -a |grep aio
Solution : Change the "aio-max-nr" kernel limit as per Oracle recommendation
fs.aio-max-nr= 3145728
Regards,
Satishbabu Gunukula
http://www.oracleracexpert.com
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