Version:           2:2.2.0-0ubuntu2 (using KDE 4.3.5)
OS:                Linux
Installed from:    Ubuntu Packages

I'm about to use Amarok (2.2) to synchronize my local music collection with media devices. In my case I'm transfering the data to a iPod Classic (160G) thus I have a great music collection.

Anarok is sychronizing the data (local -> Media device) at very slow speed (system copy by using cp or such is fine). Beside of that it is generating a very heavy system load rendering the system unusable. top likes like this:

 top - 19:43:59 up  6:18,  4 users,  load average: 155.96, 157.10, 156.23
Tasks: 307 total,   9 running, 298 sleeping,   0 stopped,   0 zombie
Cpu(s):  2.7%us,  3.8%sy,  0.0%ni,  0.0%id, 93.3%wa,  0.1%hi,  0.1%si,  0.0%st
Mem:   1802396k total,  1757132k used,    45264k free,    60256k buffers
Swap:  1967952k total,    17676k used,  1950276k free,  1323572k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 8994 arno      20   0  467m 102m  40m S   14  5.8  24:24.12 amarok
 1405 root      15  -5     0    0    0 S    7  0.0   6:31.30 kcryptd
10828 root      20   0  2584 1304  896 R    2  0.1   0:15.40 top
    4 root      15  -5     0    0    0 S    0  0.0   1:00.29 ksoftirqd/0
 1436 arno      20   0  295m  40m 9964 S    0  2.3   2:23.56 plasma-desktop
 9023 arno      20   0 70468  17m 4064 D    0  1.0   0:01.12 kio_file
 9032 arno      20   0 70468  17m 4064 R    0  1.0   0:01.25 kio_file
 9064 arno      20   0 70468  17m 4064 D    0  1.0   0:01.09 kio_file
 9069 arno      20   0 70468  17m 4064 D    0  1.0   0:01.12 kio_file
 9077 arno      20   0 70468  17m 4064 D    0  1.0   0:01.08 kio_file
 9088 arno      20   0 70468  17m 4064 D    0  1.0   0:01.22 kio_file
 9095 arno      20   0 70468  17m 4064 D    0  1.0   0:01.22 kio_file
 9121 arno      20   0 70468  17m 4064 D    0  1.0   0:01.18 kio_file
 9127 arno      20   0 70468  17m 4064 D    0  1.0   0:01.17 kio_file
 9132 arno      20   0 70468  17m 4064 D    0  1.0   0:01.14 kio_file
 9139 arno      20   0 70468  17m 4064 D    0  1.0   0:01.11 kio_file
 9142 arno      20   0 70468  17m 4064 D    0  1.0   0:01.12 kio_file

I'm guessing the kio_file processes (owned by amarok) are responsible for that. Let me know what informations you need to further investigate this problem. 

I never had this problem with Amarok 1.4