Date: Sun, 16 Mar 2003 15:51:16 +0100 From: "Olivier Dony" <odony@student.info.ucl.ac.be> To: <freebsd-questions@freebsd.org> Subject: Too many collisions on network? Message-ID: <005d01c2ebcb$82b343b0$1502a8c0@blacktrap.net>
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Hello,
I have a webserver serving a lot of requests (almost filling
up 4 Mbits/s of http at peak time everyday). It's running
Apache 1.3.27 on FreeBSD 4.7-RELEASE, and there are usually
about 200-250 http processes running. Today I was looking at
the various *stat tools to monitor it, and noticed a high
number of network collisions ie :
root@charon:/root# netstat 5
input (Total) output
packets errs bytes packets errs bytes colls
1598 0 190789 2035 0 2326238 659
1722 0 220532 2298 0 2958770 981
2547 0 347703 3078 0 2701052 1211
1937 0 274644 2461 0 3332772 1117
1619 0 235935 2169 0 2795248 725
1739 0 262005 2257 0 2076768 885
1461 0 255291 1781 0 2120986 537
1685 0 273239 1941 0 2144180 699
and so on...
Earlier today there has been a time where the webserver was
unreachable, with 1 out of 200 packets reaching it only, then
everything went back to normal. Nothing unusual in the logs.
Is there a way for me to see if the problem was the webserver
itself or the network? And is this amount of collisions
suspicious, given that the ISP is of course running a switched
network?
Thanks in advance for any ideas :-)
Olivier
PS: Lately I have been unable to post anything on the freebsd
mailing-lists from my blacktrap.net e-mail address, the mails are
accepted by the MX but seem to be discarded. I mailed
postmaster@freebsd.org but did not receive any answer, maybe the
mail was discarded too. What can I do about this?
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