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.. -*- rst -*- .. Groonga Project .. highlightlang:: none .. groonga-command .. database: commands_cache_limit ``cache_limit`` =============== Summary ------- ``cache_limit`` gets or sets the max number of query cache entries. Query cache is used only by :doc:`select` command. If the max number of query cache entries is 100, the recent 100 ``select`` commands are only cached. The cache expire algorithm is LRU (least recently used). Syntax ------ ``cache_limit`` has one optional parameter:: cache_limit [max=null] Usage ----- You can get the current max number of cache entries by executing ``cache_limit`` without parameter. .. groonga-command .. include:: ../../example/reference/commands/cache_limit/get.log .. cache_limit You can set the max number of cache entries by executing ``cache_limit`` with ``max`` parameter. Here is an example that sets ``10`` as the max number of cache entries. .. groonga-command .. include:: ../../example/reference/commands/cache_limit/set.log .. cache_limit 10 .. cache_limit If ``max`` parameter is used, the return value is the max number of cache entries before ``max`` parameter is set. Parameters ---------- This section describes all parameters. ``max`` """"""" Specifies the max number of query cache entries as a number. If ``max`` parameter isn't specified, the current max number of query cache entries isn't changed. ``cache_limit`` just returns the current max number of query cache entries. Return value ------------ ``cache_limit`` returns the current max number of query cache entries:: [HEADER, N_ENTRIES] ``HEADER`` See :doc:`/reference/command/output_format` about ``HEADER``. ``N_ENTRIES`` ``N_ENTRIES`` is the current max number of query cache entries. It is a number. See also -------- * :doc:`select`
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