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25.11.11.4 The replication_applier_status Table

This table shows the current general transaction execution status on the slave server. The table provides information about general aspects of transaction applier status that are not specific to any thread involved. Thread-specific status information is available in the replication_applier_status_by_coordinator table (and replication_applier_status_by_worker if the slave is multi-threaded).

The replication_applier_status table has these columns:

  • CHANNEL_NAME

    The replication channel which this row is displaying. There is always a default replication channel, and more replication channels can be added. See Section 16.2.3, “Replication Channels” for more information.

  • SERVICE_STATE

    Shows ON when the replication channel's applier threads are active or idle, OFF means that the applier threads are not active.

  • REMAINING_DELAY

    If the slave is waiting for DESIRED_DELAY seconds to pass since the master applied an event, this field contains the number of delay seconds remaining. At other times, this field is NULL. (The DESIRED_DELAY value is stored in the replication_applier_configuration table.)

  • COUNT_TRANSACTIONS_RETRIES

    Shows the number of retries that were made because the slave SQL thread failed to apply a transaction.

TRUNCATE TABLE is not permitted for the replication_applier_status table.

The following table shows the correspondence between replication_applier_status columns and SHOW SLAVE STATUS columns.

replication_applier_status ColumnSHOW SLAVE STATUS Column
SERVICE_STATENone
REMAINING_DELAYSQL_Remaining_Delay

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