php教程

Alternative PHP Cache (可选 PHP 缓存)

User Contributed Notes

mike at eastghost dot com 06-Feb-2012 04:39
Was using Memcache and Memcached extensions, painfully bouncing between faults, failures and shortcomings of each.  My two cents: Neither of these old drivers has been a smash hit, repressing and slowly dooming of the true potential and full use of unix memcached.

The pain finally drove to me to try APC's apc_store and apc_fetch.  The results?  Instant success, no more errors, an order of magnitude (at least) speed boost, plus one less thing (memcached) to run.  Nice.  Never going back again.  Thank y'all.
umut dot kirgoz at gmail dot com 26-Sep-2011 12:32
Since APC 3.1.3, there is a bug (http://pecl.php.net/bugs/bug.php?id=16814) which produces warnings like "Potential Cache Slam Averted for Key" when slam defense is on and you're trying to write a key that already exists.

These is not a fix right now for this, but you can change the APC settings from php.ini file like below if possible:

apc.write_lock = 1
apc.slam_defense = 0

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