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Folks, The etc/XrdOlbMonPerf script in the xrootd distribution is generating lots of orphan netstat -c -i 60 processes on our RHEL 3 system. I noticed that the pipe used to open the netstat isn't explicitly closed, but presumably it is closed when XrdOlbMonPerf exits. At the end of the while loop (~line 207) it would be cleaner to put close(CMDFD); but not essential, since it doesn't help the problem I have. It turns out that netstat doesn't die when the pipe it is writing to is closed. It apparently keeps trying for up to 15-16 more iterations - which means that each netstat hangs around for an extra 15 minutes if you have a 60 second delay between iterations. It should exit if it gets EPIPE while attempting to write its output. (You can try this with "netstat -c -i 2 | cat; date" and then in another window figure out the PID of cat and run "kill $CATPID; date" - it takes quite a while for the netstat to die, and time is apparently proportional to the time interval given to netstat.) I don't know if there is a simple cure for this. Putting in code to make sure the netstat is dead seems like an unpleasant way to work around a bug/misfeature in netstat on RHEL 3. -- Gregory J. Sharp email: [log in to unmask] Wilson Synchrotron Laboratory url: http://www.lepp.cornell.edu/~gregor Dryden Rd ph: +1 607 255 4882 Ithaca, NY 14853 fax: +1 607 255 8062