Rsyncing via LAN deadly slow

[raf]

Stephane Ascoet via rsync wrote:

> > Is there iowait? If so, that might be the problem. Also,
> 
> Where can I see this information?

in the header section of top:

  top - 12:25:13 up 43 days, 22:31,  4 users,  load average: 0.18, 0.18, 0.12
  Tasks: 366 total,   1 running, 365 sleeping,   0 stopped,   0 zombie
  %Cpu(s):  3.2 us,  1.1 sy,  1.6 ni, 91.6 id,  2.5 wa,  0.0 hi,  0.0 si,  0.0 st
  KiB Mem :  7905444 total,   623888 free,   584760 used,  6696796 buff/cache
  KiB Swap: 19543036 total, 18603192 free,   939844 used.  6345040 avail Mem

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND

On the "%Cpu" line, where it says "wa", that's the percentage of
CPU time spent waiting for an I/O device. When it's high, things
are bad, and there will be processes below that show "D" in the
"S" column. Those processes are the ones waiting on the I/O.

cheers,
raf