通过使用线程和连接，下载是串行，正如我上面所说的。
By using threads and join, downloading is serial, as I said above.
每个连接线程还执行身份验证和查询执行。
Each connection thread also performs authentication and query execution.
本文还讨论了如何在应用服务器上配置内存、线程池和JDBC连接池的初始值。
The article also discusses how to initially configure the memory, thread pool, and JDBC connection pool on the application server.
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