ndb_top — View CPU usage information for NDB threads •Minimum values for the  DataMemory ,  IndexMemory ,  MaxNoOfTables ,  MaxNoOfAttributes , MaxNoOfOrderedIndexes , and  MaxNoOfTriggers  configuration parameters required to accommodate the tables analyzed. •Memory requirements for all of the tables, attributes, ordered indexes, and unique hash indexes defined in the database. •The  IndexMemory  and  DataMemory  required per table and table row. 23.4.29 ndb_top — View CPU usage information for NDB threads ndb_top  displays running information in the terminal about CPU usage by NDB threads on an NDB Cluster data node. Each thread is represented by two rows in the output, the first showing system statistics, the second showing the measured statistics for the thread. ndb_top  is available beginning with MySQL NDB Cluster 7.6.3. ndb_top  connects to a MySQL Server running as an SQL node of the cluster. By default, it attempts to connect to a  mysqld  running on  localhost  and port 3306, as the MySQL  root  user with no password specified. You can override the default host and port using, respectively,  --host  ( -h ) and  --port  ( -t ). To specify a MySQL user and password, use the  --user  ( -u ) and  --passwd  ( -p ) options. This user must be able to read tables in the  ndbinfo  database ( ndb_top  uses information from  ndbinfo.cpustat  and related tables). For more information about MySQL user accounts and passwords, see Section 6.2, “Access Control and Account Management” . Output is available as plain text or an ASCII graph; you can specify this using the  --text  ( -x ) and  -- graph  ( -g ) options, respectively. These two display modes provide the same information; they can be used concurrently. At least one display mode must be in use. Color display of the graph is supported and enabled by default ( --color  or  -c  option). With color support enabled, the graph display shows OS user time in blue, OS system time in green, and idle time as blank. For measured load, blue is used for execution time, yellow for send time, red for time spent in send buffer full waits, and blank spaces for idle time. The percentage shown in the graph display is the sum of percentages for all threads which are not idle. Colors are not currently configurable; you can use grayscale instead by using  --skip-color . The sorted view ( --sort ,  -r ) is based on the maximum of the measured load and the load reported by the OS. Display of these can be enabled and disabled using the  --measured-load  ( -m ) and  --os-load ( -o ) options. Display of at least one of these loads must be enabled. The program tries to obtain statistics from a data node having the node ID given by the  --node-id  ( -n ) option; if unspecified, this is 1.  ndb_top  cannot provide information about other types of nodes. The view adjusts itself to the height and width of the terminal window; the minimum supported width is 76 characters. Once started,  ndb_top  runs continuously until forced to exit; you can quit the program using  Ctrl-C . The display updates once per second; to set a different delay interval, use  --sleep-time  ( -s ). 4422 ndb_top [-h  hostname ] [-t  port ] [-u  user ] [-p  pass ] [-n  node_id ] Usage