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##### 2.2.2.1 SemanticDB Search Throttle

The SemanticDB search throttle determines how aggressive SemanticDB searches are. It is controlled by the variable `semanticdb-find-default-throttle`. The default value of this variable aims for maximum accuracy, at the expense of search time.

Other parts of the Semantic package, particularly the different language parsers, may change the value of `semanticdb-find-default-throttle`. You can override its value, for a given major mode, like this:

         (setq-mode-local c-mode
                          semanticdb-find-default-throttle
                          '(project unloaded system recursive))

— Variable: semanticdb-find-default-throttle

> The default throttle for `semanticdb-find` routines. The throttle controls how detailed the list of database tables is for a symbol lookup. The value is a list with the following keys:

> `file`
>   The file the search is being performed from. This option is here for completeness only, and is assumed to always be on.
> `local`
>   Tables from the same local directory are included. This includes files directly referenced by a file name which might be in a different directory.
> `project`
>   Tables from the same local project are included If `project` is specified, then `local` is assumed.
> `unloaded`
>   If a table is not in memory, load it. If it is not cached on disk either, get the source, parse it, and create the table.
> `system`
>   Tables from system databases. These are specifically tables from system header files, or language equivalent.
> `recursive`
>   For include based searches, includes tables referenced by included files.
> `omniscience`
>   Included system databases which are omniscience, or somehow know everything. Omniscience databases are found in `semanticdb-project-system-databases`. The Emacs Lisp system db is an omniscience database.