10.14.8 NDB Cluster Thread States

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MySQL 8.4 Reference Manual Including MySQL NDB Cluster 8.4

10.14.8 NDB 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 an NDB 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).