Solved

How to set value of udp_max_buf

Posted on 2010-09-13
6
1,994 Views
Last Modified: 2013-12-21
Dear All,

I need to set the value of parameter udp_max_buf to 1048576 in kernel parameter file. How i can do that? I am using solaris 9.

Thanks.
0
Comment
Question by:riazpk
6 Comments
 
LVL 13

Author Comment

by:riazpk
ID: 33669004
Addition info:
I have already set the value by using:
ndd -set /dev/udp udp_max_buf 1048576
I just want to know how to set this value permanently in  kernel parameter file.
0
 
LVL 68

Expert Comment

by:woolmilkporc
ID: 33670271
This is from SUN's Tunable Parameters Guide -
To set a TCP/IP parameter across system reboots, include the appropriate ndd
command in a system startup script. Use the following guidelines to create a system
startup script to include ndd commands:

Create a script in the /etc/init.d directory and create links to it in the
/etc/rc2.d, /etc/rc1.d, and /etc/rcS.d directories.
The script should run between the existing S69inet and S72inetsvc scripts.
Name the script with the S70 or S71 pre¿x. Scripts with the same pre¿xarerunin
some sequential way so it doesn’t matter if there is more than one script with the
same pre¿x.
See the README ¿le in the /etc/init.d directory for more information on
naming run control scripts.

I'm not sure if /etc/system can be used here, but you could also try to add your parameter to /etc/system.
Btw. SUN doesn't recommend changing udp_max_buf  -
Again from the Tuning Guide -
Changing the following parameters is not recommended unless there are extenuating circumstances that are described with each parameter. udp_max_buf
Do not change the value. If this parameter is set to a very large value, UDP socket applications can consume too much memory.
 
Here is the book - http://dlc.sun.com/pdf/819-2724/819-2724.pdf
wmp
0
 
LVL 9

Expert Comment

by:amolg
ID: 33673107
set it in /etc/system file
0
Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

 
LVL 16

Accepted Solution

by:
Joseph Gan earned 100 total points
ID: 33676684
Add the following entry in /etc/system file, and reboot to take affect:

set udp:udp_max_buf=1048576
0
 
LVL 13

Author Comment

by:riazpk
ID: 33679041
Dear All,
Thanks for your replies. I will check them out and will let you know.
I am changing the value as it is pre-requisite for Oracle RAC.
0
 
LVL 13

Author Closing Comment

by:riazpk
ID: 33705776
Thanks.
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I promised to write further about my project, and here I am.  First, I needed to setup the Primary Server.  You can read how in this article: Setup FreeBSD Server with full HDD encryption (http://www.experts-exchange.com/OS/Unix/BSD/FreeBSD/A_3660-S…
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now