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| 14 | <H1>[IRCServices Coding] A bit more on FD limits (not strictly services-related)</H1> | |
| 15 | <B>Russell Garrett</B> | |
| 16 | <A HREF="mailto:ircservices-coding%40ircservices.za.net?Subject=%5BIRCServices%20Coding%5D%20A%20bit%20more%20on%20FD%20limits%20%28not%20strictly%20services-related%29&In-Reply-To=NDBBLDHKLKMANPGMACIGIEPBCPAA.rg%40tcslon.com" | |
| 17 | TITLE="[IRCServices Coding] A bit more on FD limits (not strictly services-related)">rg at tcslon.com | |
| 18 | </A><BR> | |
| 19 | <I>Wed Jun 5 04:39:02 PDT 2002</I> | |
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| 33 | <!--beginarticle--> | |
| 34 | <PRE>OK, I've done a touch more research on this, the Linux default is | |
| 35 | maximum 1024 FDs per process, and 4096 in total. A `cat | |
| 36 | /proc/sys/fs/file-nr` will tell you the number of open FDs, the | |
| 37 | number in use, and the maximum limit. | |
| 38 | ||
| 39 | To increase the maximum number of FDs to 65536 (for a 2.2 kernel - I | |
| 40 | think 2.4 is the same): | |
| 41 | ||
| 42 | 1. In /usr/include/bits/types.h change the "#define __FD_SETZISE | |
| 43 | 1024" to "#define __FD_SETSIZE 65536" | |
| 44 | 2. Do the same in /usr/include/linux/posix_types.h | |
| 45 | 3. Recompile your kernel | |
| 46 | ||
| 47 | The following steps need to be performed every time you start the | |
| 48 | FD-hungry application, or in your init scripts: | |
| 49 | ||
| 50 | 4. echo "65536" > /proc/sys/fs/file_max | |
| 51 | 5. echo "196608" > /proc/sys/fs/inode_max | |
| 52 | 6. ulimit -HSn 65536 | |
| 53 | ||
| 54 | Russ Garrett | |
| 55 | <A HREF="http://www.ircservices.za.net/mailman/listinfo/ircservices-coding">russ at garrett.co.uk</A> | |
| 56 | www.faereal.net | |
| 57 | ||
| 58 | ||
| 59 | </PRE> | |
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