How to clear APC cache without crashing Apache?

Question

If APC stores a lot of entries, clearing them crashes httpd.

If apc_clear_cache('user') takes longer than phps max_execution_time the script calling apc_clear_cache will be terminated by php before the clearing-operation is finished. this seems to leave some handles or sth. that will prevent apache from closing it's processes.

(http://pecl.php.net/bugs/bug.php?id=13445)

Is there some other quick but safe way of bulk cleanup of APC cache?

score 5 · Accepted Answer · answered Feb 09 '10 at 10:24

5

You can remove the time limit on a script you're running (as long as you don't run php in safe mode)

set_time_limit(0);

This will remove the time limit for the script

http://au2.php.net/manual/en/function.set-time-limit.php for more details

answered Feb 09 '10 at 10:24

Thomas Winsnes

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I just noticed that this was the suggested workaround for the problem in the link you posted :) – Thomas Winsnes Feb 09 '10 at 10:36

score 5 · Answer 2 · answered Oct 17 '10 at 14:44

5

You can also gracefully restart apache and it will reload with a clean APC.

answered Oct 17 '10 at 14:44

Collector

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is this a valid approach in a production environment when one would gracefully restart apache after a new deployment version of an app? – Jorre Nov 15 '10 at 22:56
it's acceptable if you don't care about a second of down time. – MrPHP Mar 18 '11 at 11:47
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_Gracefully_ restarting Apache doesn’t cause any downtime at all, not even a second. – scy Mar 07 '12 at 11:16
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So three people agree with me but none up-voted my answer... hmmm :( – Collector Mar 08 '12 at 11:45

How to clear APC cache without crashing Apache?

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