1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
.. -*- 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
------
This command takes only 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`
|
