Runbook

Data Corruption in PostgreSQL Database.

Overview

Data corruption in a PostgreSQL database refers to the loss, alteration, or invalidation of data stored in the database. This can occur due to various reasons like hardware or software failures, human errors, network issues, or malicious attacks. When data corruption occurs, it can cause several problems like data inconsistency, incorrect or incomplete data retrieval, system crashes, and even data loss. Recovering data from a corrupted PostgreSQL database requires specialized skills and tools. Preventing data corruption involves implementing measures like regular database backups, monitoring for system errors, and using robust data validation techniques.

Parameters

Debug

Check the PostgreSQL database for any corruption

Check the status of PostgreSQL database

Check the PostgreSQL logs for any error messages

Check the integrity of the PostgreSQL database cluster

Check the memory usage on the server

Check the CPU usage on the server

Check the Disk Usage on the server

Check the network connectivity to the server

Check the PostgreSQL configuration settings

Repair

Restore data from a backup: If you have a recent backup of the database, you can restore the data from it. However, this may cause some data loss if the backup was not taken right before the corruption occurred.

Repair corrupted tables: If only a few tables in the database are corrupted, you can try to repair them using the PostgreSQL tool called pg_resetxlog or pg_resetwal.

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