Error
Error Code:
58030
PostgreSQL Error 58030: Disk I/O Operation Failure
Description
This error indicates that PostgreSQL encountered a problem performing an input/output operation, typically involving disk access. It means the database system failed to read from or write to a file or device required for its operation, often due to issues external to PostgreSQL itself.
Error Message
io error
Known Causes
4 known causesInsufficient Disk Space or Permissions
The disk where PostgreSQL data resides may be full, or the PostgreSQL user lacks the necessary read/write permissions for its data directories.
Underlying Hardware Failure
Issues with the physical storage device (e.g., hard drive, SSD) or its controller can prevent successful I/O operations.
Network Storage Issues
If PostgreSQL data is stored on network-attached storage (NAS) or a shared filesystem, network connectivity problems or issues with the remote storage server can cause I/O failures.
Filesystem Corruption or OS Issues
Corruption of the underlying filesystem or operating system-level problems with I/O handling can lead to this error.
Solutions
3 solutions available1. Check Disk Space and Permissions easy
Verify that the PostgreSQL data directory has sufficient free space and that the PostgreSQL user has read/write permissions.
1
Determine the PostgreSQL data directory. You can find this by connecting to your PostgreSQL server and running the following SQL query:
SHOW data_directory;2
On the server hosting PostgreSQL, check the available disk space for the partition where the data directory resides.
df -h <data_directory_path>3
If disk space is low, free up space by deleting unnecessary files or expanding the storage. If permissions are an issue, ensure the PostgreSQL user (usually 'postgres') owns the data directory and has appropriate read/write permissions.
sudo chown -R postgres:postgres <data_directory_path>
sudo chmod -R 700 <data_directory_path>4
Restart the PostgreSQL service to apply any permission changes and to ensure it can access the data directory correctly.
sudo systemctl restart postgresql2. Inspect PostgreSQL Logs for Specific I/O Errors medium
Examine PostgreSQL's log files for more detailed I/O error messages that can pinpoint the exact cause.
1
Locate your PostgreSQL log files. The location varies by operating system and installation, but common paths include `/var/log/postgresql/postgresql-<version>-main.log` or within the `pg_log` subdirectory of your `data_directory`.
find /var/log/postgresql/ -name '*.log'
find <data_directory_path> -name 'pg_log'2
Open the most recent log file and search for entries around the time the 58030 error occurred. Look for specific OS-level I/O error messages (e.g., 'No space left on device', 'Input/output error', 'Permission denied').
tail -n 100 <log_file_path> | grep -i 'io error'3
Analyze the specific error message to understand the underlying problem. For example, 'No space left on device' points to disk space, while other messages might indicate hardware issues or file system corruption.
Example: If you see 'No space left on device', follow the steps in 'Check Disk Space and Permissions'. If you see 'Input/output error', it might indicate a hardware problem with the disk.3. Verify Underlying Storage Health advanced
Check the health of the physical or virtual storage device where PostgreSQL is storing its data.
1
If using physical disks, run diagnostic tools provided by your hardware vendor or use OS-level tools to check for disk errors. For example, on Linux:
sudo smartctl -a /dev/sdX (replace /dev/sdX with your disk device)2
If using cloud storage (e.g., AWS EBS, Azure Disk Storage), check the health status and metrics of the storage volume in your cloud provider's console. Look for any reported errors or performance degradation.
Consult your cloud provider's documentation for storage health checks.3
If storage health issues are detected, consider replacing the faulty hardware or reconfiguring your cloud storage. For critical data, ensure you have backups before making significant changes to storage.
This step is highly dependent on your infrastructure and may require vendor support or cloud provider assistance.