Slow downloads

[sedmonds]

Hi,

Current system is E8500 dual core processor, 8GB RAM, running FreeNAS. SABnbzd version is 0.6.7 (was same story with 0.6.6).
Seems very adequate for downloads, but sometimes I seem to get my full speed (around 5.6MB/s), but the last few downloads are barely hitting 1MB/s. The system resources are virtually idle:

Code: Select all

last pid: 55910;  load averages:  0.06,  0.06,  0.07                                                                                                     up 2+18:10:07  12:46:32
115 processes: 1 running, 114 sleeping
CPU:  1.9% user,  0.0% nice,  2.8% system,  0.0% interrupt, 95.3% idle
Mem: 3522M Active, 416M Inact, 3604M Wired, 343M Cache, 827M Buf, 34M Free
Swap:

  PID USERNAME    THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
55511 root         21  64    0   290M   205M uwait   0   2:53  6.59% /usr/local/bin/python /mnt/ZFSVOL/apps/SABnzbd/SABnzbd.py
 2463 root         20  44    0   124M 50916K select  0   5:51  0.00% /usr/local/bin/python /mnt/ZFSVOL/apps/CouchPotato/CouchPo
 1847 root          7  44    0 65012K  3812K ucond   1   1:20  0.00% /usr/local/sbin/collectd
15464 root          1  44    0 33304K  1148K select  1   0:31  0.00% sshd: root@pts/3 (sshd)
 2217 www           1  44    0 19328K  1716K kqread  0   0:20  0.00% /usr/local/sbin/lighttpd -f /usr/local/etc/lighttpd/lightt
 1789 root          6  44    0   207M 61968K uwait   1   0:16  0.00% /usr/local/bin/python /usr/local/www/freenasUI/manage.py r
52989 root         20  44    0   124M 61912K select  1   0:12  0.00% /usr/local/bin/python /mnt/ZFSVOL/apps/SickBeard/SickBeard
 1398 root          1  44    0 36912K  1140K select  1   0:08  0.00% /usr/local/sbin/nmbd -D -s /usr/local/etc/smb.conf
28279 root          1  44    0 33304K  1140K select  0   0:07  0.00% sshd: root@pts/5 (sshd)
47638 root          1  44    0 11780K   956K select  1   0:01  0.00% /usr/sbin/ntpd -g -c /etc/ntp.conf -p /var/run/ntpd.pid -f
 1733 root          1  44    0 16088K   740K select  1   0:01  0.00% proftpd: (accepting connections) (proftpd)
 1968 root          1  46    0  7832K   616K nanslp  1   0:01  0.00% /usr/sbin/cron -s
 1283 root          4  44    0  5684K   408K rpcsvc  0   0:01  0.00% nfsd: server (nfsd)
 6838 root          1  44    0 33304K  1132K select  1   0:00  0.00% sshd: root@pts/2 (sshd)
 1402 root          1  44    0 45488K  1068K select  1   0:00  0.00% /usr/local/sbin/smbd -D -s /usr/local/etc/smb.conf
 1124 root          1  44    0  6904K   592K select  0   0:00  0.00% /usr/sbin/syslogd -s -C
15476 root          1  44    0 10104K   868K ttyin   0   0:00  0.00% bash
 2311 root          1  45    0 63032K  1684K ttyin   1   0:00  0.00% python /etc/netcli
 1311 root          1  76    0  7956K   400K rpcsvc  1   0:00  0.00% /usr/sbin/rpc.lockd
 1258 root          1  44    0  7836K   556K select  0   0:00  0.00% /usr/sbin/rpcbind

No errors in sabnzbd.log.
I've tried setting the cache to various different values, from -1 to 512M, but still slow.

Any clues please?

Many thanks for reading.

[shypike]

You expect me to say something clever with so little info?
How large is your queue, what's the average job size.
Is there a correlation between the age of the NZB and the speed?
Which Usenet provider do you use?

[sedmonds]

Hiya,

Sorry, of course, queue is just 3 jobs, two are around 11GB, one is 13GB.
Usenet provider is supernews (downloads are always fast with Newsbin pro on Windows).

One is 227 days old.
Another is 442 days old.
Final one is 119 days old.
I've switched the order around between these particular ones, but downloads still sticking around 1MB/s

I've just added another one to the queue (3GB), and pushed it to the top of the queue- still same download rate, also added another much smaller (500MB) nzb (14 hours old), but same download speed.

Many thanks for your time.

[shypike]

Weird, I use Supernews all the time.
Are you in the US or Europe? Last week someone from the US reported better
results using the European severs (also weird)
How many connections do you have?
Are you you sure you did not set a speed limit?

[sedmonds]

Hi,

I'm in Europe, tried both regular news.supernews.com and news.eu.supernews.com, and both SSL and non-SSL connections. I use 20 connections regularly, I've double checked my speed limit, definitely not set.

Very baffled! In an attempt to rule out the provider as an issue I did sign up for another usenet provider, but that did not have any impact on the speed- exactly the same.

Just to test, I just kicked off a Newsbin pro download, 5.6MB/s all the way, very weird!

[shypike]

20 isn't really necessary with Supernews, you might try with less connections.
As a last ditch you could stop SABnzbd, remove all files in the admin folder,
and restart SABnzbd.
Then go to the Status page a do a queue recover.

[sedmonds]

Thanks for all your help so far, I've tried all these, with no effect.
The strangest thing is that some of my downloads last night did download at the full speed, whilst the rest have been downloading at a max of 1 MB/s.

Guess I'll have to live with it.