MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
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The Performance Schema exposes lock information through these tables:
data_locks: Data locks held and requesteddata_lock_waits: Relationships between data lock owners and data lock requestors blocked by those ownersmetadata_locks: Metadata locks held and requestedtable_handles: Table locks held and requested
The following sections describe these tables in more detail.