Oracle 5.0 Reference Manual page 1634

MySQL Server Options and Variables for MySQL Cluster
Use index statistics in query optimization. Defaults to ON.
NDB
•
ndb_index_stat_update_freq
Command-Line Format
Option-File Format
How often to query data nodes instead of the statistics cache. For example, a value of
default) means to direct every 20
•
ndb_optimized_node_selection
Command-Line Format
Option-File Format
Causes an SQL node to use the "closest" data node as transaction coordinator. For this purpose,
a data node having a shared memory connection with the SQL node is considered to be "closest"
to the SQL node; the next closest (in order of decreasing proximity) are: TCP connection to
localhost; SCI connection; TCP connection from a host other than localhost.
This option is enabled by default. Set to
each data node in the cluster in succession. When this option is disabled each SQL thread attempts
to use a given data node 8 times before proceeding to the next one.
•
ndb_report_thresh_binlog_epoch_slip
Command-Line Format
Option-File Format
This is a threshold on the number of epochs to be behind before reporting binlog status. For
example, a value of
received from the storage nodes and which epoch has been applied to the binlog is 3 or more, a
status message will be sent to the cluster log.
•
ndb_report_thresh_binlog_mem_usage
Default
ON
[1614]
--ndb_index_stat_update_freq
ndb_index_stat_update_freq
Permitted Values
Type
numeric
Default
20
Range
0 .. 4294967295
th
query to the data nodes.
[1614]
--ndb-optimized-node-selection=#
ndb_optimized_node_selection
Permitted Values
Type
boolean
Default
ON
Permitted Values
Type
numeric
Default
3
Range
0 .. 3
or
0
--ndb_report_thresh_binlog_epoch_slip
ndb_report_thresh_binlog_epoch_slip
Permitted Values
Type
numeric
Default
3
Range
0 .. 256
(the default) means that if the difference between which epoch has been
3
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to disable it, in which case the SQL node uses
OFF
[1614]
[1614]
(the
20