59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
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#!/bin/sh
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#
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# Copyright (c) 2012 George V. Neville-Neil
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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# The hotopen D script periodically outputs table of which UIDs
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# are opening files. This is a very quick way to find out if
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# a paritcular user is thrashing a system with rapid calls to
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# open/close.
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#
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# Usage: hotopen
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#
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/usr/sbin/dtrace -n '
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#pragma D option quiet
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BEGIN
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{
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printf("Files opened per UID in the last second.\n");
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}
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syscall::open:entry
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{
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@files[uid] = count();
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output = 1;
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}
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tick-1sec
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/output != 0/
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{
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printf("%-20Y \n", walltimestamp);
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printa("uid %d\tcount %@d\n", @files, @files);
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trunc(@files);
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output = 0;
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}
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'
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