No speed if I open more than 1 torrent

[rudolfo2]

If I downloading 1 torrent everything is fine,but soon as I open the second one the download speed drops and never get up again.There's no problem with bandwith.If I download first with 200kB/s after opening the second on both torrents speed wont go over 30kB/s.Something is chocked and I have no idea what.Please any sugestions ?Change setting ?

[Switeck]

What's your max connections per torrent and overall?

What's your upload slots per torrent set to? (it defaults to 4 uploads per torrent)

What's your total upload speed set to?

If your upload speed PER upload (which is total upload speed divided by total uploads) falls below about 3-5 KB/sec, then even though you're still uploading to lots of peers they may decide to not return the favor. This is because the download speeds they're getting from you is "trivial" compaired to how fast they're downloading from other peers.

Or you could be having some generalized 'blanket overload', since going from 1 torrent to 2 may be doubling the total number of connections as well as new connection attempts per second. µTorrent doesn't count connection attempts towards its max connection limit, although it tries to not make more than 8 outgoing connection attempts at once.

Are you using UPnP on a router to avoid being firewalled in µTorrent?

Many routers can't handle UPnP very well with lots of connections and either slow down or crash.

[rudolfo2]

Hi

Global is 400

Max Peers 100

Slots 7

Max active torrents 7

Max Active dl 3

My connection is 10MB/10MB ( on good tracker with a few seeds I see dl over 800kB/s easily )

NO ROOTER DNS server Kaspersky Firewall ( System Mechanics PRO 6.q )

Must say here that my ISP is new and still not running 100 %.

My total speed is caped to 80 %.When I open second connection I adjust upload speed accordingly.

My total dl speed is set to 1000 kB/s or 600 kB/s depending on 1 or 2 torrent.

[Switeck]

You have a 10 mbit symmetric internet connection?!

Wow, I've heard of 6mbit cablemodems and dsl modems overloading crappy routers...so yours is probably overkilled.

Only thing I can think of is reduce global and torrent max connections even further.

Try 100 global and 60 per torrent max connections.

If your upload speed is 600-1000 KB/sec, try raising your upload slots to 20. This is to make upload speed per slot well over 10 KB/sec -- which is typically double or more what most others are uploading at (per slot).

I can only assume you may have an obscure driver/firmware/hardware weakness that might be fix-able with the latest firmware upgrades (usually free to do) or replacing hardware with better equipment (which always costs money).

Is there anything special about the way you get your internet connection?

Is it ADSL2+? FDDI? OC-3? T-3? Fractional T-3? latest DOCSIS Cable varient?

Have you tried looking at traceroutes/pingroutes from your connection to others in a torrent to see if there's some sort of connection problem? (not really needed, that's best left to the experts if you don't feel like doing it. Just something to try.)

More you know the more likely you are to solving your problem.

[rudolfo2]

My connection is VDSL,but with this difference that only my relay station is connected with fiber but not me ( not yet ).I'm still on copper wire.

Down speed realy depends on how many and if any 100MB seeders are seeding;other factors ( queue,chocking ....)plays the role too.So I could dowload whole DVD-R in few hours or in two days.I'll do some experimenting but connecting second torrent realy made uTorrent suffer.

[Switeck]

The only thing I can think of is Win XP SP2's half-open conneciton limit of 10 by default (you have to hack it to go higher.)

If running 1 torrent, that's ok -- it can make up to 8-10 new connections at a time. But if you're running 2 torrents then they can only make 4-5 new connections at a time at most. But that still shouldn't reduce speeds well below 25%.

Despite your speed, is there a poor router/switch between you and others on the internet? Using a traceroute/ping an ip, do you see 1 hop that takes >30 ms? It may not handle lots of connections gracefully.

Have you tried other file-sharing programs -- BitTornado is a good one to try as well. If it can get the speeds with 2+ torrents that µTorrent can't...this might qualify as a bug report.

Barring that, the ("your computer might have a...") virus/trojan theory makes more sense than anything else I can think of.

[rudolfo2]

When using Bittornado I didn't have any such problems.I was running sometimes 5 torrents at once without problems.My PC is clean,I don't have rooter and I'm familiar with WinXP problems but was never forced to hack them.My Kaspersky's Anti-Hacker is capable to open ports as many as needed and as I said before on good tracker uTorrent will connect in few seconds to 100 seeds/peers.If I open the second torrent the connection

will be quick as well but my bandwith will die.If the speed on first torrent is 500 kB/s after I open the second one the speed will drop to 30-50 on each torrent and will stay there which make no sense.

[Firon]

Have you tried disabling the firewall to see if it may be a setting that's not getting along with µTorrent?

[rudolfo2]

Doing some experimenting I've finally found my proper up speed ( including cap ) and everything is OK.If I watch and calculate the up speed for each open torrent I could open as many as I want,so long the up bandwith isn't tilt.I like uTorrent more with every day.