utorrent only start download after some minutes

[proleader]

When i download torrent, utorrent only start download (connect to seeds and peers) after some minutes.

This problem only happen after a period of use when i seed many torrents (about 50-100 torrents)

I open all ports and network status in utorrent is: OK

My system:

CPU:Intel Xeon i7

Ram:12 GB

OS: Windows Server 2008

Connection: 1 Gbit (open all ports)

Please help. Thanks !

[Switeck]

What's your uTorrent settings and internet max speeds down and up?

The settings shown by Setup Guide (CTRL+G) in uTorrent will probably tell us enough if you didn't change any advanced settings.

[proleader]

Here is it:

[Switeck]

If that connection really is >100 mbit/sec upload class, those settings should be alright.

...BUT your networking has to be very robust to have 1000 connections at once!

And how fast are you uploading in total?

Try rafi's uTorrent Guide?: http://forum.utorrent.com/viewtopic.php?id=74820

[proleader]

Download: 100 MB/s ( but I limit it to 30 MB/s because utorrent will hang if speed is too high)

Upload: 20-50 MB/s

[Switeck]

There's all kinds of bottlenecks appearing at such high speeds -- hard drives can't seek, read, or write fast enough...even hard drive controllers can be bottlenecks if they're external drives.

Many 1 gbit/sec networks can't sustain >300 mbit/sec to any 1 computer even if that's ALL they're doing.

What's your setup's half open connection limit?

And does your networking monitoring software/equipment report LOTS of "connections" that do not show up in uTorrent?