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MySQL 5.7 Reference Manual  /  ...  /  MySQL Cluster Thread States

9.14.8 MySQL Cluster Thread States

  • Committing events to binlog

  • Opening mysql.ndb_apply_status

  • Processing events

    The thread is processing events for binary logging.

  • Processing events from schema table

    The thread is doing the work of schema replication.

  • Shutting down

  • Syncing ndb table schema operation and binlog

    This is used to have a correct binary log of schema operations for NDB.

  • Waiting for allowed to take ndbcluster global schema lock

    The thread is waiting for permission to take a global schema lock.

  • Waiting for event from ndbcluster

    The server is acting as an SQL node in a MySQL Cluster, and is connected to a cluster management node.

  • Waiting for first event from ndbcluster

  • Waiting for ndbcluster binlog update to reach current position

  • Waiting for ndbcluster global schema lock

    The thread is waiting for a global schema lock held by another thread to be released.

  • Waiting for ndbcluster to start

  • Waiting for schema epoch

    The thread is waiting for a schema epoch (that is, a global checkpoint).

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