On Fri, Apr 11, 2014 at 03:56:39PM -0700, Hans Rasmussen
wrote:> Hi All
>
>
>
> Having the strangest performance problem with Samba on 1GB ethernet.
>
>
>
> Clients are Windows 7. Server is a modern Xeon on an Intel Board with 16GB
> ram running Opensuse 13.1 with all updates. Samba is 4.1.6. smb.conf
> doesn't have anything special in it, haven't played around with the
socket
> options. The server is a Xen host, samba is running on the host, not the
> guest.
>
>
>
> Writes to server are quick, 125MB/sec. Reads are slow, sometimes starting
> at 11MB/sec, but I have found a strange way of making them go faster. On
> the server over ssh, I open a 'vim'. I then hit Ctrl-C to get the
escape
> prompt from vim and the read speed instantly doubles, hit it again, the
> speed maxes out at 85MB/sec. Watching top, the CPU usage by smbd starts at
> 6%, but increases everytime I hit Ctrl-C in vim. Transferring the same
> file to the server with FTP goes at 125MB/sec both ways. I'm confused.
TCP tuning ? Get a wireshark trace, only way to be sure..