我有一个java web服务应用程序，我使用Eclipse和tomcat作为我的服务器在我的本地机器上运行。通过VPN，我连接到Oracle数据库（因为我将要连接的数据库的网络位于另一个国家/地区）。但是当我在我的网络浏览器中运行应用程序时，我需要10分钟才能登录并转到主菜单屏幕。为什么加载这么长时间有什么可能的问题？
我在Toad Oracle中访问了数据库并尝试了一个查询，但结果只显示了几秒钟。通过VPN，我也ping数据库并得到了这个结果：
Pinging 192.168.1.6 with 32 bytes of data:
Reply from 192.168.1.6: bytes=32 time=181ms TTL=63
Reply from 192.168.1.6: bytes=32 time=174ms TTL=63
Reply from 192.168.1.6: bytes=32 time=178ms TTL=63
Reply from 192.168.1.6: bytes=32 time=249ms TTL=63
Reply from 192.168.1.6: bytes=32 time=166ms TTL=63
Reply from 192.168.1.6: bytes=32 time=179ms TTL=63
Reply from 192.168.1.6: bytes=32 time=169ms TTL=63
Reply from 192.168.1.6: bytes=32 time=657ms TTL=63
Reply from 192.168.1.6: bytes=32 time=532ms TTL=63
Reply from 192.168.1.6: bytes=32 time=192ms TTL=63
Reply from 192.168.1.6: bytes=32 time=205ms TTL=63
Reply from 192.168.1.6: bytes=32 time=173ms TTL=63
Reply from 192.168.1.6: bytes=32 time=198ms TTL=63
Reply from 192.168.1.6: bytes=32 time=181ms TTL=63
Reply from 192.168.1.6: bytes=32 time=342ms TTL=63
Request timed out.
Reply from 192.168.1.6: bytes=32 time=190ms TTL=63
Reply from 192.168.1.6: bytes=32 time=182ms TTL=63
Reply from 192.168.1.6: bytes=32 time=318ms TTL=63
Reply from 192.168.1.6: bytes=32 time=215ms TTL=63
Reply from 192.168.1.6: bytes=32 time=182ms TTL=63
Reply from 192.168.1.6: bytes=32 time=478ms TTL=63
Reply from 192.168.1.6: bytes=32 time=182ms TTL=63
Reply from 192.168.1.6: bytes=32 time=206ms TTL=63
Reply from 192.168.1.6: bytes=32 time=209ms TTL=63
Reply from 192.168.1.6: bytes=32 time=479ms TTL=63
Reply from 192.168.1.6: bytes=32 time=648ms TTL=63
Reply from 192.168.1.6: bytes=32 time=1231ms TTL=63
Reply from 192.168.1.6: bytes=32 time=207ms TTL=63
Reply from 192.168.1.6: bytes=32 time=226ms TTL=63
Reply from 192.168.1.6: bytes=32 time=165ms TTL=63
Reply from 192.168.1.6: bytes=32 time=216ms TTL=63
Reply from 192.168.1.6: bytes=32 time=290ms TTL=63
Reply from 192.168.1.6: bytes=32 time=211ms TTL=63
Reply from 192.168.1.6: bytes=32 time=234ms TTL=63
Reply from 192.168.1.6: bytes=32 time=360ms TTL=63
Reply from 192.168.1.6: bytes=32 time=281ms TTL=63
Reply from 192.168.1.6: bytes=32 time=304ms TTL=63
Reply from 192.168.1.6: bytes=32 time=327ms TTL=63
Reply from 192.168.1.6: bytes=32 time=249ms TTL=63
Reply from 192.168.1.6: bytes=32 time=270ms TTL=63
Reply from 192.168.1.6: bytes=32 time=199ms TTL=63
Reply from 192.168.1.6: bytes=32 time=234ms TTL=63
Reply from 192.168.1.6: bytes=32 time=236ms TTL=63
Reply from 192.168.1.6: bytes=32 time=195ms TTL=63
Reply from 192.168.1.6: bytes=32 time=179ms TTL=63
Reply from 192.168.1.6: bytes=32 time=202ms TTL=63
Reply from 192.168.1.6: bytes=32 time=168ms TTL=63
Reply from 192.168.1.6: bytes=32 time=181ms TTL=63
Reply from 192.168.1.6: bytes=32 time=186ms TTL=63