The error message “Error locking mutex 22” in PostgreSQL is typically caused by a problem with the system’s memory management or by a misconfiguration in the database. This error message usually occurs when PostgreSQL is unable to lock a shared resource, such as a table or index, due to a problem with the system’s memory management or with the configuration of the database.
There are several potential causes of this error message, including:
- Insufficient memory: If the system does not have enough available memory to run PostgreSQL, it may cause the database to crash or produce the “Error locking mutex 22” error message.
- Misconfigured parameters: If the parameters in the PostgreSQL configuration file are set incorrectly, it may cause the database to behave abnormally and produce the “Error locking mutex 22” error message.
- Concurrent access: If multiple threads or processes are attempting to access the same resource simultaneously, it may cause the database to produce the “Error locking mutex 22” error message.
- Corrupted data: If the data in the database is corrupted, it may cause the database to produce the “Error locking mutex 22” error message.
To resolve the “Error locking mutex 22” error message in PostgreSQL, you should first check the system’s memory usage and make sure that there is enough available memory to run the database. You should also check the configuration parameters in the PostgreSQL configuration file and make sure that they are set correctly. If the error message persists, you may need to backup and restore the database or repair any corrupted data.
In conclusion, the “Error locking mutex 22” error message in PostgreSQL is typically caused by a problem with the system’s memory management or by a misconfiguration in the database. To resolve this error, you should check the system’s memory usage, the configuration parameters in the PostgreSQL configuration file, and the data in the database.