On Wed, Oct 17, 2007 at 11:23:18AM +0100, Bob Payne wrote:
> I've observed a most bizarre thing....
> I started "snoop" on the Solaris Networker server to capture network
> packets while the very slow Oracle backup was running.
> This caused the backup to speed up  to "normal" speed. How weird is that?

Weird, but not unheard of.  I've definitely seen that before (with other
application, not with networker).

Snoop may slow down the machine or the connection enough that some error
condition does not occur, and the error condition requires a reset that
takes longer than the slowdown.  This could be a network problem (duplex
mismatch?), OS (TCP algorithm, fast start bugs), to the application
(race condition on timing of packet receipt).  

You might want to compare the result of that snoop with a packet capture
from another machine (so you get the "bad" result).  

-- 
Darren Dunham                                           ddunham AT taos DOT com
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER