Path: utzoo!mnetor!uunet!husc6!hao!oddjob!gargoyle!thisted From: thisted@gargoyle.UChicago.EDU (Ronald A. Thisted) Newsgroups: comp.unix.wizards Subject: netstat tables Message-ID: <829@gargoyle.UChicago.EDU> Date: 17 Dec 87 15:37:37 GMT Reply-To: thisted@galton.uchicago.edu (Ronald A. Thisted) Distribution: na Organization: Dept of Statistics, Univ of Chicago Lines: 37 Keywords: netstat, nfs, ftp When I ftp to a particular computer (chip) on our local net, and if I send a file to that machine from my local machine, on exit from ftp I find that I have added a permanent entry into the active connections table produced by netstat, an example of which is > Active connections > Proto Recv-Q Send-Q Local Address Foreign Address (state) > ... > tcp 0 0 galton.uch.1626 chip.uchic.20 FIN_WAIT_2 There are currently a dozen such lines, and they appear to extract a nontrivial performance penalty, apparently through the agency of the nfs daemon. I am no wizard, but I am hoping that someone can enlighten me as to 1) what is going on 2) whether I can manually remove (kill, close?) the offenders (short of reboot) 3) whether there is risk of filling up a table of some sort (if I just ignore the problem) 4) whether the apparent degradation in load could be due to this phenomenon 5) whether the fault is likely to be local or remote 6) what I might do to remedy the situation. Some facts: the local machine is a SUN-2/120 running bsd4.2, release 2.2, and ftp version 4.10. The remote machine is a dec-20 running tops-20 and a version of ftp that has the label 5T(14). The problem does not occur unless my machine initiates ftp contact, and a file is sent to the remote. The problem does not occur in using ftp with other machines as remote; it also does not occur when doing the ftp from another machine (say a vax) to chip. Any clues would be most welcome. Ronald Thisted Department of Statistics The University of Chicago thisted@galton.uchicago.edu ...ihnp4!gargoyle!galton!thisted