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[��]��ֿ��ȵ� Facebook �� PHP ��ġ��һЩ��ܿ�� Facebook ��Ա��ľ��顣�� geekSessions վ��Ͽ�� Facebook �� Lucas Nealan ��ĵ��Ƚ��вο��ֵ�� Cache Ϊ �� κ�һ��...

��ֿ��ȵ� Facebook �� PHP ��ġ��һЩ��ܿ�� Facebook ��Ա��ľ��顣�� geekSessions վ��Ͽ�� Facebook �� Lucas Nealan ��ĵ��Ƚ��вο��ֵ��

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Facebook ƽ��ÿ��û�ÿ��Ҫ��ʳ�� 50 ��ҳ�棬PHP��ҳ��ʱ��Ż��ͱȽ��Ҫ�ˡ�� PHP Cache �㣬Facebook �� APC��

Lucas Nealan �� PPT ��һ��ӣ�һ��ҳ��ʾ��ʱ�� 4000 ��뽵�� 100 �� 롣�� apc.stat �رյ�ģʽ�£��ܻ�Ҫ��һЩ��Ҫ��apc_clear_cache() ��֪ͨ��¡�

APC Cache ��Ƿ��û��ص��Ϣ��û��ص�� Cache ��Ȼ�� Memcached �С�

Facebook ��˳�� 400 ̨ Memcached �� 5TB �� Memcached �С��ǵ�ǰ�� Memcached ��Ⱥ�ˡ�Ҳ�� Memcached ��˲��ٴ��룬�� UDP ��֧�ֺ��ϵ��(�� 20%)��

Facebook ��Ա�� Callgrind ��APD�� xdebug ��KCachegrind �ȹ��߽��л�׼��ܲ��ԡ��κ�һ�� Web ��Ŀ��Ҳ�ǲ��ɻ�ȱ��Ҳ�ǱȽ��׺��Ե�һ��п��Ա��Ӧ�þ߱��ʹ��Щ��ߵ��źá�

Ϊʲô Facebook ѡ�� PHP ��? ��Flickr �� Cal Henderson ��仰��˵��: "Languages's don't Scale, Architecture Scale"��

�� 80-20 ��ԭ�򿴣�APC �� Memcached ��Ҫ�ġ��¹��/��Ҫ��⼸��ڡ�

(��ͼ�Ǵ� Lucas Nealan ��ĵ��صģ��Ȩ��)

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