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Doc Bug #59599 APC Cache Algorithm is not fully documented?
Submitted: 2011-01-31 12:55 UTC Modified: 2014-02-01 10:03 UTC
From: mattd at whatscookin dot com Assigned: krakjoe (profile)
Status: Closed Package: APC (PECL)
PHP Version: 5.2.17 OS: CentOS 5.5
Private report: No CVE-ID: None
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From: mattd at whatscookin dot com
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 [2011-01-31 12:55 UTC] mattd at whatscookin dot com 
Description:
------------
In the documentation for apc_store() and apc_add(), the 
circumstances for which an entry is removed from the cache is 
not fully explained when ttl=0.  The docs list "clear, 
restart, etc", and it is not clear what "etc" covers.

It is also unclear what happens when the cache is full, and 
apc_store()/apc_add() is called, and whether LRU, LFU, or 
another cache strategy is employed to free up space.

The documentation for the apc.ttl option hints that no other 
cache strategies are used, but it could be more explicit.

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 [2014-02-01 10:03 UTC] krakjoe@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: krakjoe
 [2014-02-01 10:03 UTC] krakjoe@php.net 
Outdated PHP aside, the information you are looking for is included in the TECHNOTES file distributed with APC(u), the information it contains is out of the scope of the normal PHP manual, but is available. I feel that's enough to satisfy the request for information for those that cannot just read the code.

Your PHP is ancient, so closing the bug, but at least you got your answer :)
 
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