The threadblocks table associates data nodes,
        threads, and instances of NDB kernel blocks.
      
        The threadblocks table contains the following
        columns:
node_idNode ID
thr_noThread ID
block_nameBlock name
block_instanceBlock instance number
Notes
        The value of the block_name in this table is
        one of the values found in the block_name
        column when selecting from the
        ndbinfo.blocks table. Although
        the list of possible values is static for a given NDB Cluster
        release, the list may vary between releases.
      
        The block_instance column provides the kernel
        block instance number.