Oracle 5.0 Reference Manual page 1635

Command-Line Format
Option-File Format
This is a threshold on the percentage of free memory remaining before reporting binlog status. For
example, a value of
binlog data from the data nodes falls below 10%, a status message will be sent to the cluster log.
•
ndb_use_exact_count
Variable Name
Variable Scope
Dynamic Variable
Forces
NDB
type of query. The default value is ON. For faster queries overall, disable this feature by setting the
value of
ndb_use_exact_count
•
ndb_use_transactions
Command-Line Format
Option-File Format
Variable Name
Variable Scope
Dynamic Variable
You can disable
The default is ON.
17.3.4.4. MySQL Cluster Status Variables
This section provides detailed information about MySQL server status variables that relate to MySQL
Cluster and the
general information on using status variables, see
•
Handler_discover
The MySQL server can ask the
name. This is called discovery.
tables have been discovered using this mechanism.
•
Ndb_cluster_node_id
MySQL Server Options and Variables for MySQL Cluster
--ndb_report_thresh_binlog_mem_usage
ndb_report_thresh_binlog_mem_usage
Permitted Values
Type
Default
Range
(the default) means that if the amount of available memory for receiving
10
[1615]
ndb_use_exact_count
Global, Session
Yes
Permitted Values
Type
Default
to use a count of records during
[1615]
--ndb_use_transactions
ndb_use_transactions
ndb_use_transactions
Global, Session
Yes
Permitted Values
Type
Default
transaction support by setting this variable's values to
NDB
storage engine. For status variables not specific to MySQL Cluster, and for
NDB
[1615]
NDBCLUSTER
Handler_discover
[1615]
numeric
10
0 .. 10
boolean
ON
SELECT COUNT(*)
[1615] to OFF.
boolean
ON
Section 5.1.6, "Server Status
storage engine if it knows about a table with a given
[1615]
1615
query planning to speed up this
(not recommended).
OFF
Variables".
indicates the number of times that