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Is orphan process handling by Solaris os and Linux os same?

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Top Forums UNIX for Beginners Questions & Answers Is orphan process handling by Solaris os and Linux os same?
# 1  
Old 05-08-2017
Is orphan process handling by Solaris os and Linux os same?
In solaris, orphan process is put to sleep mode and does not consume any CPU resources. In Linux, orphan process is kept in running state consuming all CPU and Ram resources. Is it the case? Is there a difference on how these operating systems will handle orphan processes?

The route cause of asking this question is, we were having one application on solaris , we migrated that on RHEL 6. On solaris, that application was running perfectly fine even if after orphan processes generated. After migrated it on Linux, it is started freezing, giving performance issues, consuming more RAM and CPU utilisation is 99%. It did not happened on solaris.
Last edited by rbatte1; 05-08-2017 at 04:40 AM.. Reason: More clarification. rbatte1 removed needless font & colour formatting
# 2  
Old 05-08-2017
Moderator's Comments:
Mod Comment This thread has been moved from the What is on Your Mind? forum to a technical forum.

You state in your post that Solaris systems and Linux systems behave completely differently when a parent process terminates without waiting for its children to terminate and then ask if they behave differently when a parent process terminates without waiting for its children to terminate??? Although I find it hard to believe that many of the differences that you stated as facts are true; if you believe that those facts are true, I do not understand why you are asking the question.

Is this a homework assignment?

What code are you running that exhibits the differences you are seeing on Solaris systems and Linux systems?

What Solaris release(s) are you using?

What Linux distribution(s) are you using? Which version(s) of those Linux distribution(s) are you using?
# 3  
Old 05-08-2017
Thanks for your response.
In Linux (RHEL 6), when a process becomes orphan, it consumes all the CPU resources. No resources are left for the application to run.

In Solaris (10), when a process becomes orphan, we do not see any load on the server. We have no issues to run the application.

If possible, I would like to understand why the same orphan process consumes more resources in Linux and not in solaris.
# 4  
Old 05-08-2017
Dispite different implementations, Solaris 10 and RHEL 6 should behave the same in principal:
if a parent process terminates, the child process is hooked to pid 1 (init). It depends on the client process' code (application) what happens then.
So you should examine your application with tools like strace.
This User Gave Thanks to MadeInGermany For This Post:
Belure Pooja B
# 5  
Old 05-08-2017
We have applied strace command, found some error on recv() system call, that is failing returning -1 , error "temporarily resources are unavailable "
# 6  
Old 05-08-2017
Well, that's a start, what were they reading from?
# 7  
Old 05-09-2017
The same application in solaris is migrated to Linux. We have not done anything more. except this migration. Then also same application performance is not good in Linux. It was good in solaris. I would like to know what is the reason.
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