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µTorrent uses all RAM on big files while seeding.


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I seriously do not know what to do!

Have no firewall or antivirus installed...

Windows firewall service is disabled.

Tried clearing settings by delete AppData\Roaming\uTorrent and re-adding torrents.

Every time µtorrent seeds/uploads big files (over a few GBs) over approximately 5MB/s it uses a few GB RAM.

1. How come µtorrent uses this much cache?

2. How can I limit this?

3. Can I set µtorrent to have a RAM limit?

the important parts:

100Mbit/100Mbit connection.

Windows 7 RTM

ASUS P5Q3 Deluxe


Samsung SpinPoint F3 HD103SJ 32MB 1TB

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the largest amount I've seen so far is 7.9GB of usage.

This last time the torrent was limited to 3MB/s up and still memory usage was 7.4GB

As soon as I stop a torrent that I suspect the RAM usage drops to low, about 1 GB or so (not sure).

an example how it is now, still growing in size


It doesn't really matter if µtorrent does this directly or indirectly, this wasn't meant as a bug report.

It was cry for help :D

Can I do anything?

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