This step has to be done again whenever you create a new database connection in the future.
将来只要创建一个新数据库连接,就需要执行这个步骤。
By keeping the connection alive, the overhead of establishing a new connection is eliminated and hence future requests from the browser is served faster.
通过让连接继续处于活动状态,可以省去建立新连接的开销,从而使浏览器可以更快地为以后的请求提供服务。
Connection pooling spreads the connection overhead across several user requests, thereby conserving application resources for future requests.
连接池将连接开销分散分布在若干用户请求中,以便保留应用程序资源供未来请求使用。
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