The Term Lexicon Manager settings are loaded through the TermLexiconModule.default.xml configuration file. Table 4-8 shows the parameters for the Term Lexicon Manager.
Parameter |
Default |
Description |
|---|---|---|
term.length.max |
20 |
The maximum term length deemed 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. This parameter affects the lookup performance of the Term Lexicon Manager. Do not change this value without consulting Sybase Technical Support. |
