Django database cache TIMEOUT - make backend delete row
up vote
2
down vote
favorite
I'm not sure what Django database cache does with expired entries but it seems that they remain in the database.
I want Django to delete them after they expire because their size is huge and there can be unlimited number of different keys.
CACHES =
'default':
'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
'LOCATION': 'cache_table',
'TIMEOUT': 60 * 20,
I use cache on filtered list of objects and this filter contais number and char fields.
Is it possible?
python django caching django-database django-cache
asked Nov 11 at 21:52
Milano
4,1751140112
add a comment |
up vote
2
down vote
favorite
I'm not sure what Django database cache does with expired entries but it seems that they remain in the database.
I want Django to delete them after they expire because their size is huge and there can be unlimited number of different keys.
CACHES =
'default':
'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
'LOCATION': 'cache_table',
'TIMEOUT': 60 * 20,
I use cache on filtered list of objects and this filter contais number and char fields.
Is it possible?
python django caching django-database django-cache
asked Nov 11 at 21:52
Milano
4,1751140112
add a comment |
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I'm not sure what Django database cache does with expired entries but it seems that they remain in the database.
I want Django to delete them after they expire because their size is huge and there can be unlimited number of different keys.
CACHES =
'default':
'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
'LOCATION': 'cache_table',
'TIMEOUT': 60 * 20,
I use cache on filtered list of objects and this filter contais number and char fields.
Is it possible?
python django caching django-database django-cache
asked Nov 11 at 21:52
Milano
4,1751140112
I'm not sure what Django database cache does with expired entries but it seems that they remain in the database.
I want Django to delete them after they expire because their size is huge and there can be unlimited number of different keys.
CACHES =
'default':
'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
'LOCATION': 'cache_table',
'TIMEOUT': 60 * 20,
I use cache on filtered list of objects and this filter contais number and char fields.
Is it possible?
python django caching django-database django-cache
python django caching django-database django-cache
asked Nov 11 at 21:52
Milano
4,1751140112
asked Nov 11 at 21:52
Milano
4,1751140112
asked Nov 11 at 21:52
Milano
4,1751140112
asked Nov 11 at 21:52
Milano
4,1751140112
asked Nov 11 at 21:52
Milano
4,1751140112
4,1751140112
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
It isn't possible to purge expired entries as they expire. This is one of the many reasons you probably don't want to use the database cache in production!
If possible, you should switch to a different cache backend (I prefer Redis). If you can't, you do have a few other options:
If you know the cache keys you want to purge, you can use the low-level cache API to directly delete the keys you want to purge.
You could tweak the
MAX_ENTRIESand/orCULL_FREQUENCYcache arguments to limit the overall size of the cache.You could poke into the database directly (perhaps from a background task or cron job), manually running some SQL like
DELETE FROM cache_table WHERE expires < now()(I haven't tested this, but I think it should work).
answered Nov 11 at 22:25
jacobian
4,08021511
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53253618%2fdjango-database-cache-timeout-make-backend-delete-row%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
It isn't possible to purge expired entries as they expire. This is one of the many reasons you probably don't want to use the database cache in production!
If possible, you should switch to a different cache backend (I prefer Redis). If you can't, you do have a few other options:
If you know the cache keys you want to purge, you can use the low-level cache API to directly delete the keys you want to purge.
You could tweak the
MAX_ENTRIESand/orCULL_FREQUENCYcache arguments to limit the overall size of the cache.You could poke into the database directly (perhaps from a background task or cron job), manually running some SQL like
DELETE FROM cache_table WHERE expires < now()(I haven't tested this, but I think it should work).
answered Nov 11 at 22:25
jacobian
4,08021511
add a comment |
up vote
1
down vote
It isn't possible to purge expired entries as they expire. This is one of the many reasons you probably don't want to use the database cache in production!
If possible, you should switch to a different cache backend (I prefer Redis). If you can't, you do have a few other options:
If you know the cache keys you want to purge, you can use the low-level cache API to directly delete the keys you want to purge.
You could tweak the
MAX_ENTRIESand/orCULL_FREQUENCYcache arguments to limit the overall size of the cache.You could poke into the database directly (perhaps from a background task or cron job), manually running some SQL like
DELETE FROM cache_table WHERE expires < now()(I haven't tested this, but I think it should work).
answered Nov 11 at 22:25
jacobian
4,08021511
add a comment |
up vote
1
down vote
up vote
1
down vote
It isn't possible to purge expired entries as they expire. This is one of the many reasons you probably don't want to use the database cache in production!
If possible, you should switch to a different cache backend (I prefer Redis). If you can't, you do have a few other options:
If you know the cache keys you want to purge, you can use the low-level cache API to directly delete the keys you want to purge.
You could tweak the
MAX_ENTRIESand/orCULL_FREQUENCYcache arguments to limit the overall size of the cache.You could poke into the database directly (perhaps from a background task or cron job), manually running some SQL like
DELETE FROM cache_table WHERE expires < now()(I haven't tested this, but I think it should work).
answered Nov 11 at 22:25
jacobian
4,08021511
It isn't possible to purge expired entries as they expire. This is one of the many reasons you probably don't want to use the database cache in production!
If possible, you should switch to a different cache backend (I prefer Redis). If you can't, you do have a few other options:
If you know the cache keys you want to purge, you can use the low-level cache API to directly delete the keys you want to purge.
You could tweak the
MAX_ENTRIESand/orCULL_FREQUENCYcache arguments to limit the overall size of the cache.You could poke into the database directly (perhaps from a background task or cron job), manually running some SQL like
DELETE FROM cache_table WHERE expires < now()(I haven't tested this, but I think it should work).
answered Nov 11 at 22:25
jacobian
4,08021511
answered Nov 11 at 22:25
jacobian
4,08021511
answered Nov 11 at 22:25
jacobian
4,08021511
answered Nov 11 at 22:25
jacobian
4,08021511
4,08021511
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53253618%2fdjango-database-cache-timeout-make-backend-delete-row%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
