The Term Lexicon Manager settings are loaded through the TermLexiconModule.default.xml configuration file. Table 3-8 shows the parameters for the Term Lexicon Manager.
Parameter |
Default |
Description |
|---|---|---|
term.length.max |
20 |
The maximum term length considered valid for indexing. This value must match the Text Manager parameter max.term.length. See “Setting Text Manager parameters”. |
cache.capacity |
131,072 |
The number of terms stored in memory to improve indexing and querying performance. |
cache.useRootChildrenCache |
true |
If set to true, the underlying term lexicon data structures cache some of their structure in memory to improve indexing and querying performance. |
unify.size.threshold |
10,000 |
Determines how many terms in each term lexicon segment are stored in memory before being written to disk. |
unify.idle.threshold |
120,000 |
The time, in milliseconds, that the Term Lexicon Manager remains idle before unifying the pending terms. The idle time is restarted when a new term is added, or when an existing term is looked up. |
number.of.segments |
20 |
The number of term lexicon segments. For maximum efficiency, the value should be equal to the term.length.max. |
minimization.factor |
50 |
The branching factor of the underlying term lexicon segments. WARNING! This parameter affects the lookup performance of the Term Lexicon Manager. Do not change this value without consulting Sybase Technical Support. |
