memcache make performance decrease?

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Hi, all.

I am a employer of Yahoo China, I am working for a temporary blog system.
The question is our system can just response 30 qps in product serer while
15 qps in test server. Now I want to improve its performance. But when I add
memcache between the dbs and the forehead servers, the qps has decreased to
13 in test server. Can somebody help me? 

Thanks very much.

 

ÍõÉç°² warren.wang
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Tel£º010-65985353
YahooID£ºwang_shean2006
E-mail:warren.wang at alibaba-inc.com
Address£º±±¾©Êг¯ÑôÇøÎ÷´óÍû·1ºÅÎÂÌØÀ³ÖÐÐÄA×ù11²ã

 

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