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175 lines
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<TITLE>The Answer Guy 37: Max Open Files and Inodes: Use The Entries under <TT>/proc</TT></TITLE>
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H1><A NAME="answer">
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border="0" align="middle">
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<font color="#B03060">The Answer Guy</font>
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<BR>
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<H4>By James T. Dennis,
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<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
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Starshine Technical Services,
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<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
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height="50" width="60" alt="(?) " border="0"
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>Max Open Files and Inodes: Use The Entries under <TT>/proc</TT></H3>
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<p><strong>From 4th Dimension Webmaster on Thu, 31 Dec 1998
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</strong></p>
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<!-- ::
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Max Open Files and Inodes: Use The Entries under <TT>/proc</TT>
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:: -->
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<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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Hi , i have a DUAL 400MHz Pentium 2 processor which runs 400+
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processes. In kernel 2.0.x i had to increase max processes in
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tasks.h, and nr_files and nr_inodes in fs.h.
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</STRONG></P>
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<P><STRONG>
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I tried kernel 2.1.131, it was much more efficient with the dual
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processors and everything ran more smooth, except one
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problem. there is no "nr_inodes" in fs.h. So when ever i hit
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around 400 processes , it was out of file descriptors and couldnt
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spawn any other processes. If you know how to over come this
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problem please let me know.
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</STRONG></P>
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<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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You should be able to just 'echo' the desired values
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into the proper nodes under the <TT>/proc</TT> filesystem.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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Those would be something like:
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</BLOCKQUOTE>
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<BLOCKQUOTE><BlockQuote>
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/proc/sys/kernel/file-max
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<Br>/proc/sys/kernel/file-nr
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<Br>/proc/sys/kernel/inode-max
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<Br>/proc/sys/kernel/inode-nr
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</BlockQuote></BLOCKQUOTE>
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<BLOCKQUOTE>
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... though I just snarfed those in while running
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a 2.0.x. I'll need to fetch a 2.1.132 and start
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a new round of tests on that kernel.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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In any event --- the nodes should be under <TT>/proc</TT>
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somewhere -- and you can just use 'echo' with
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standard shell redirection to put new values
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into these at run-time.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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Somewhere on the 'net there is a FAQ or HOWTO
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that describes this and gives sample values.
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I think the max inodes should be about 3 times
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the max open files. Anyway, take a look through
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the Kernel mailing list FAQ at:
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</BLOCKQUOTE>
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<BLOCKQUOTE><BlockQuote>
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<A HREF="http://www.tux.org/lkml.html"
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>http://www.tux.org/lkml.html</A>
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</BlockQuote></BLOCKQUOTE>
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<P> <hr> <P>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
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>Copyright ©</a> 1999, James T. Dennis
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<BR>Published in <I>The Linux Gazette</I> Issue 37 February 1999</H5>
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