Mongodb or Memcached on busy site?

My system have开发者_运维百科 a huge connections and data read and write always. I installed Memcached (only one memcached)but failed because a large connections and I tried to install Mongodb (only one instance too) but still failed.

My data is not large (about > 10.000 records). Now I'm using MySQL but it's very slow.

I'm thinking about memcached replication and master/slave on mongodb! Which one should i choice?

Thank you very much!

(sorry for my bad English)

MySQL is not likely to be causing your site to run slowly, especially with the amount of data you mention. I would stick with MySQL and try to find what is causing your site to run slowly.

Try running EXPLAIN on your MySql queries to know what is going wrong...