Slow speeds on sabnzbd+ (ubuntu)

[patriotdow]

I've been running sabnzbd for a while now from my windows 7 i7 machine without issues. However, it's not very easy on the wallet to leave a full blown desktop running 24/7 so I recently setup my low powered server machine with Ubuntu Server. However, I noticed my speeds are not even half of what they should be. I have a 35mbps connection and expect to see about 4megabytes a second download. I am seeing about 1.7 max on sabnzbd on my server. Any ideas what may be causing this?

I know its not my usenet provider because my windows 7 machine gets full speeds

I have python 2.6 running on my server and I read in the documentation that 2.4 and 2.5 are the only supported ones. I've noticed no ill effect from running 2.6 so far but anyone think this may be the cause of my issue?

I've tried adjusting the article cache to -1, 70M, 0, and 120M and it doesn't seem to make any difference on speed.

I'm also able to download from my server over LAN using vsftpd @ 12megabytes per second or using wget over the internet @ my expected 4megabytes per second.

All of the above leads me to believe it's not my NIC and it's not my usenet provider

machine specs: 500mhz amd geode processor with 512mb RAM

Any suggestions?

Thanks in advance

[shypike]

Python 2.6 is supported.
No idea what a "amd geode" can do, but I get 6 MBytes/second on
a Windows Home Server with an average Atom processor.

Make sure the yenc Python package is installed.

[patriotdow]

python yenc package is installed. Any idea on how high my system load numbers can get before it starts bottlenecking?

Should also update the FAQ

http://wiki.sabnzbd.org/faq#toc4

[shypike]

Very hard to tell.
It might very well be that the combination is just slow.
If the speed is jumpy that might be an indication that the
backend cannot keep up with the download speed.

BTW: Python 2.6 is supported, but we haven't looked at how its performance is compared to 2.5.
The Windows distribution is based on 2.5, the OSX distro on 2.6.

[patriotdow]

shypike - thanks for the responses but any actual suggestions on things to try and fix it? No offense but it sounds like i'm getting a tough luck kind of response.

I did another test to try and disprove bottlenecking. I started a download with sabnzbd and got my typical 1.7megabytes per second and then started a download with wget and I got 2.3megabytes per second filling the gap in my bandwidth.

So I don't think the processor is bottlenecking.

[patriotdow]

NM new info shows cpu utilization at 99 percent when downloading via sabnzbd so it must be a processor thing. Any way to reduce the load sabnzbd imposes on it?

[shypike]

Apart from making sure yenc is correctly installed,
and setting logging to a minimum: no.
It isn't any faster.