Description: The ‘gtid_purged’ is a variable in the context of database replication that indicates the GTIDs (Global Transaction Identifiers) that have been purged from the server. This variable is crucial for managing replication in database environments, as it allows replica servers to know which transactions have been purged and therefore should not be replicated. GTIDs are a mechanism that facilitates replication by providing a unique identifier for each transaction, helping to maintain the integrity and order of transactions in a distributed environment. The ‘gtid_purged’ variable is automatically updated when transactions are deleted, and its value is essential for synchronization between the master and replicas, especially in recovery situations or when reconfiguring replication. In summary, ‘gtid_purged’ is a key tool to ensure that database servers operate consistently and efficiently in a replication environment, preventing transaction duplication and ensuring data consistency.
