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Old 11-03-2010, 01:11 AM   #1
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Registered: Nov 2010
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Question ASM will not start automoatically after a reboot

Anyone have the problem below and have a solution for it? Running close to a go live date of 11/10/10 and need to have this fixed. DBA is pointing to the OS which is RedHat Enterprise Release 5.3. with Oracle RAC 10G

Oracle works fine it just wonít start up automatically after a reboot. After a reboot a person with root access has to increase the number of semaphores and then oracle will start and function. The next time the machine is bounced the same issue will arise and the semaphores need to be increased again by hand. Every time the machine is bounces the semaphores need to be increased by hand. This is not normal for a Unix machine. Semaphores are not part of the oracle install, it is a kernel parameter on Unix machines. Eventually after several reboots the semaphore parameter will be too high for the box to function. Once the semaphores have hit their peak, we reset them back to the original value and the whole process starts over again. This is a Unix build issue that has only surfaced on the production machines. The DAS development machines have the exact same oracle build and do not have this issue.
Old 11-03-2010, 08:58 AM   #2
Registered: Nov 2008
Location: Lower Saxony, Germany
Distribution: CentOS, RHEL, Solaris 10, AIX, HP-UX
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it seems you defined a to small amount of semaphores in your /etc/sysctl.conf. Did you really make your settings permanent?

Re-check Oracle installation documentation there is a brief description how to do this. And yes, setting up Shared memory and semaphores is a part of the Oracle installation.

Take a look at the Oracle documentation here.

If you are unsure or you are expecting a fault in Oracle software open a service request at Metalink, also you can consult RedHat support because of you are using RHEL.


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