7.3.64. thread_limit¶
7.3.64.1. Summary¶
New in version 5.0.7.
thread_limit has the following two features:
- It returns the max number of threads.
- It sets the max number of threads.
groonga executable file is the only Groonga server that
supports full thread_limit features.
groonga-httpd supports only one feature
that returns the max number of threads. The max number of threads of
groonga-httpd always returns 1
because groonga-httpd uses single thread
model.
If you're using Groonga as a library, thread_limit doesn't work
without you set custom functions by
grn_thread_set_get_limit_func() and
grn_thread_set_set_limit_func(). If you set a function by
grn_thread_set_get_limit_func(), the feature that returns
the max number of threads works. If you set a function by
grn_thread_set_set_limit_func(), the feature that sets the
max number of threads works.
7.3.64.3. Usage¶
You can get the max number of threads by calling without any parameters:
Execution example:
thread_limit
# [[0, 1337566253.89858, 0.000355720520019531], 2]
If it returns 0, your Groonga server doesn't support the feature.
You can set the max number of threads by calling max parameter:
Execution example:
thread_limit --max 4
# [[0, 1337566253.89858, 0.000355720520019531], 2]
It returns the previous max number of threads when you pass
max parameter.
7.3.64.4. Parameters¶
This section describes all parameters.
7.3.64.4.1. Required parameters¶
There is no required parameter.
7.3.64.4.2. Optional parameters¶
There is one optional parameter.
7.3.64.4.2.1. max¶
Specifies the new max number of threads.
You must specify positive integer:
Execution example:
thread_limit --max 3
# [[0, 1337566253.89858, 0.000355720520019531], 4]
If you specify max parameter, thread_limit returns the
max number of threads before max is applied.
7.3.64.5. Return value¶
The command returns the max number of threads as body:
[HEADER, N_MAX_THREADS]
If max is specified, N_MAX_THREADS is the max number of
threads before max is applied.
See Output format for HEADER.