How is the caches parameter configured in the Django cache optimization?

In Python development, if the operation Django write, in order to improve efficiency, often need to optimize the cache, and then you will be introduced to the cache optimization must only know the caches parameters related knowledge, come together to see it.

CACHES configuration Parameters Overview-format

CACHES Dictionary configuration format is as follows

{
' Default ': {
' Backend ':
' Django.core.cache.backends.locmem.LocMemCache ',
}
}

The default cache must be configured when you configure the CACHES dictionary

CACHES configuration Parameters Overview-Backend

Supported backend:

1) ' Django.core.cache.backends.db.DatabaseCache '
2) ' Django.core.cache.backends.dummy.DummyCache '
3) ' Django.core.cache.backends.filebased.FileBasedCache '
4) ' Django.core.cache.backends.locmem.LocMemCache '
5) ' Django.core.cache.backends.memcached.MemcachedCache '
6) ' Django.core.cache.backends.memcached.PyLibMCCache '
Configurable cache back-end list

CACHES Configuration Parameters Overview-Additional parameters

Each cache backend can set additional parameters to control the caching behavior. The following parameters can be configured:

1) TIMEOUT

Cache default expiration time (seconds), 300s (5mins) not set

2) OPTIONS

Optional configuration, different back end, optional configuration options

3) Key_prefix

The default is automatically added to the front of all cache keys

4) VERSION

Default cache keys for version

5) Key_function

Generate final cache function path for keys

Like Locmem, filesystem and database caches implement the cull policy with the following parameters:
Culling policy parameters (options):
Max_entries
Maximum number of allowed in the cache before old data is deleted, default: 300
Cull_frequency
When the number of caches reaches max_entries, a partial cache is deleted, the deletion rate is 1/cull_requency, and if cull_frequency = 2, half of the data is deleted when the max_entries is reached. Default value: 3

CACHES Configuration Parameters Overview-Example

CACHES = {
' Default ': {
' Backend ': ' Django.core.cache.backends.filebased.FileBasedCache ',
' Location ': '/var/tmp/django_cache ',
' TIMEOUT ': 60,
' OPTIONS ': {
' Max_entries ': 1000
}
}
}

Note: Invalid parameters are ignored and do not affect the entire project

Article Source: Wheat Academy

Original link: http://www.maiziedu.com/wiki/django/caches/

How is the caches parameter configured in the Django cache optimization?