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expansion_limit
The maximum number of expanded keywords for a single wildcard. Optional, default is 0 (no limit). Introduced in version 2.0.1-beta.
When doing substring searches against indexes built with
dict = keywords enabled, a single wildcard may
potentially result in thousands and even millions of matched
keywords (think of matching 'a*' against the entire Oxford
dictionary). This directive lets you limit the impact
of such expansions. Setting expansion_limit = N
restricts expansions to no more than N of the most frequent
matching keywords (per each wildcard in the query).
Example:
expansion_limit = 16
