ndbinfo: The NDB Cluster Information Database Node ID Thread ID Block name Block instance number 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. The  threads  table provides information about threads running in the  NDB  kernel. The  threads  table contains the following columns: ID of the node where the thread is running Thread ID (specific to this node) Thread name (type of thread) Thread (type) description Sample output from a 2-node example cluster, including thread descriptions, is shown here: 4589 Notes • thread_description • thread_name • thr_no • node_id • block_instance • block_name • thr_no Notes 23.5.14.53 The ndbinfo threads Table mysql>  SELECT * FROM threads; +---------+--------+-------------+------------------------------------------------------------------+ | node_id | thr_no | thread_name | thread_description | +---------+--------+-------------+------------------------------------------------------------------+ | 5 | 0 | main | main thread, schema and distribution handling | | 5 | 1 | rep | rep thread, asynch replication and proxy block handling | | 5 | 2 | ldm | ldm thread, handling a set of data partitions | | 5 | 3 | recv | receive thread, performing receive and polling for new receives | | 6 | 0 | main | main thread, schema and distribution handling | | 6 | 1 | rep | rep thread, asynch replication and proxy block handling | | 6 | 2 | ldm | ldm thread, handling a set of data partitions |