Seeding affect downloading

[GoogleCodeExporter]

What steps will reproduce the problem?
1.Add many seeding torrents (more than 1500) to libtorrent and add some 
downloading torrent (about 100);
2.Download speed is very slow (less 100 KB/s).
3.Remove all seeding torrents download speed up to about 500KB ~ 1MB/s.

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
libtorrent 0.16.13
OS: windows server 2008 R2 

Please provide any additional information below.
Is this has something with add_torrent_params?

Original issue reported on code.google.com by voi...@hotmail.com on 23 Apr 2014 at 4:20

[GoogleCodeExporter]

These days I do some test with this, at last I find the half open limit cause
this, I set this to very low value(just 5), now I set it to 500 or more (800),
that's ok.

Original comment by voi...@hotmail.com on 28 Apr 2014 at 1:48

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[GoogleCodeExporter]

ok. great. in future versions of libtorrent there are attempts to mitigate this 
by prioritizing connection attempts to downloading torrents.

Original comment by arvid.no...@gmail.com on 29 Apr 2014 at 6:19

• Changed state: Done
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