Database Won’t Restart After Shutdown Immediate

If the database cannot be restarted after using “shutdown immediate,” it may be due to one of the following reasons:

1. During the closing process, the database encountered an error or abnormal situation, which might prevent it from closing properly and consequently, unable to restart. In such a scenario, one can attempt to forcefully close the database using the “shutdown abort” command and then try to restart it.
2. Some files or components of the database instance are damaged or missing, which may prevent the database from starting properly. You can try to restore from a database backup file or reinstall the database software to fix any potential damage or missing files.
3. There are restrictions on resources on the server where the database instance is located, such as insufficient memory or disk space. This may prevent the database from starting or shutting down. You can check the server’s resource usage and try to free up some resources so that the database can restart properly.

Please note that the above are some common reasons, and specific reasons may vary depending on factors like the database version and operating system. If you are unable to resolve the issue, it is recommended to seek help from a database administrator or technical support.