Database cache system

A database cache system which is located between an online game server and a database, supports a non-blocking query processing approach, and minimizes query compilations, transaction processing, and physical disc accesses, the database cache system comprising:

• a network library which processes an access request issued by the online game server by using an input output completion port (IOCP);
• at least one database connection module which provides a connector for reading data from the database or recording data to the database;
• a database cache which stores data read from the database by the database connection module;
• and
• at least one cache buffer which is allotted to an IOCP worker thread corresponding to a database query request issued by the online game server and stores data read from the database, which is to be transmitted to the online game server.