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Troubleshooting Database Server Startup
Solve problems with starting the database.
In this section:
Ensure That Your Transaction Log File Is Valid
The database server won't start if the existing transaction log file is invalid.
Ensure That You Have Enough Disk Space for Your Temporary File
If you do not have enough disk space available to the temporary directory, you will have problems starting the server.
Debugging Network Communications Startup Problems
If the server fails to start with a TCP/IP or communication-related error, you can use the -z debugging server option.