Oracle 5.0 Reference Manual page 1633

MySQL Server Options and Variables for MySQL Cluster
Option Sets Variable
Variable Name
Variable Scope
Dynamic Variable
The number of milliseconds that elapse between checks of MySQL Cluster SQL nodes by the
MySQL query cache. Setting this to 0 (the default and minimum value) means that the query cache
checks for validation on every query.
The recommended maximum value for this variable is 1000, which means that the check is
performed once per second. A larger value means that the check is performed and possibly
invalidated due to updates on different SQL nodes less often. It is generally not desirable to set this
to a value greater than 2000.
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ndb_force_send
Command-Line Format
Option-File Format
Option Sets Variable
Variable Name
Variable Scope
Dynamic Variable
Forces sending of buffers to
•
ndb_index_stat_cache_entries
Command-Line Format
Option-File Format
Sets the granularity of the statistics by determining the number of starting and ending keys to store
in the statistics memory cache. Zero means no caching takes place; in this case, the data nodes are
always queried directly. Default value: 32.
•
ndb_index_stat_enable
Command-Line Format
Option-File Format
Yes,
ndb_cache_check_time
ndb_cache_check_time
Global
Yes
Permitted Values
Type
numeric
Default
0
--ndb-force-send
ndb_force_send
Yes,
ndb_force_send
ndb_force_send
Global, Session
Yes
Permitted Values
Type
boolean
Default
TRUE
immediately, without waiting for other threads. Defaults to ON.
NDB
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--ndb_index_stat_cache_entries
ndb_index_stat_cache_entries
Permitted Values
Type
numeric
Default
32
Range
0 .. 4294967295
[1613]
--ndb_index_stat_enable
ndb_index_stat_enable
Permitted Values
Type
boolean
1613
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