Solved

Linux, RHEL 6.2 differences

Posted on 2012-04-03
5
440 Views
Last Modified: 2012-04-04
I ran the same software package on both RHEL 5.6 and RHEL 6.2

Both RHEL 5.6 and RHEL 6.2 use a default of 1024 for the number of processes a user is allowed

The software worked in RHEL 5.6 and not RHEL 6.2

However, when I increased the number processes a user is allowed in limits.conf, (I did a reboot since I had started processes from this user), the software all of a sudeen started working properly

So why did increasing the number of processes in RHEL 6.2 work, since both RHEL 5.6 and RHEL 6.2 have the same number of default processes?
0
Comment
Question by:Los Angeles1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 

Author Comment

by:Los Angeles1
ID: 37801804
Did the futex change come in RHEL 6.x, could that be part of the issue
0
 
LVL 11

Expert Comment

by:legolasthehansy
ID: 37801956
Is the under lying architecture of both the servers same? (check using uname -m)
Your application must be using more processes which would need to be checked..

ps -ef | grep <app> | wc -l (on both servers)
0
 

Author Comment

by:Los Angeles1
ID: 37802066
On RHEL 5.x I had about 20 processes

On RHEL 6.2 I had over a thousand, but then I increased the number of users and the number of processes decrease to about 32

So yes, the architecture of the 2 OS's are different

Can anyone speculate as to how RHEL 5.x and 6.x are different in this regard ?
0
 
LVL 11

Expert Comment

by:legolasthehansy
ID: 37802165
What is the s/w package?
How did you decrease the number of process from 'over a thousand' to 32?

Just trying to get more info.
0
 
LVL 78

Accepted Solution

by:
arnold earned 500 total points
ID: 37804000
Depending on what your app does,mthe default config seems to have limited what processing it needed to perform such that all the incoming tasks were queuing up unable to be completed. I.e. a race condition where to compete a process it needs four resources, but at any one time there were only three available until you change increasing the available resources to four.

5 and 6 are different in kernel, as well as other packages. There is no direct upgrade path from 5 to 6 because of the many differences.
Presumably both are of similar architecture 32 or 64 bit.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Little introduction about CP: CP is a command on linux that use to copy files and folder from one location to another location. Example usage of CP as follow: cp /myfoder /pathto/destination/folder/ cp abc.tar.gz /pathto/destination/folder/ab…
I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
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…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

728 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