On Wed, Mar 11, 2009 at 13:49, Michael Green <mishagr...@gmail.com> wrote: > On Wed, Mar 11, 2009 at 11:36 AM, Aviv Greenberg <avivg...@gmail.com> wrote: >> What is the server used for? What traffic is comming into the server >> (small packets? full MTU?)? at what rate? How many RX descriptors is >> your driver set for? Do you have 802.3X flow control enabled (both >> ends)? Do you see any abnormal CPU usage when the packet drops occur? >> > > I'm not quite sure how to check out all these things...
Mainly using ethtool - read the man page > > The server is doing backups. Naturally most of the traffic happens > during night hours. > > >> But more fundementally, why are you even concerned with 2916/689587830 >> packet drops? On most scenarious, this is pretty normal behaviour. >> > I'm concerned because occasionally the backup application shuts its > TCP port on which it listens. It seems to happen after a considerable > amount of drops/errors have accumulated on the interface. The only way > out then is to recycle the app. I suspect that these errors might be > the indication of the problem that causes abnormal application > behavior. > > >> i would be more curious why there are 2900 errors :) >> > > I realize there might be a million different reasons for these errors. > How can I investigate them? 1. Use ethtool to set and query device settings 2. Use ethtool -S and netstat -s to get error statistics 3. Use dmesg to see if there were any errors printed by the device (hangs, watchdog messages, etc) > > _______________________________________________ > Linux-il mailing list > Linux-il@cs.huji.ac.il > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il > -- Bob Hope - "Middle age is when your age starts to show around your middle." _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
