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siranjeevi 06-14-2010 04:46 AM
Will zombie process leads to server load un stable?
 
Hello,

There are around 173 zombie process on my client's server, my question is whether zombie process on the server will make server's load unstable like it goes to 20-26 suddenly and comes down and goes high suddenly,will zombie process consume system's resource?..

Thanks,
--Siru

vikas027 06-14-2010 07:18 AM
I would suggest you to look at PPIDs of the zombie processes and then look for their orgination. We can then dig the issue further.

NitinkumarYemul 06-14-2010 07:35 AM
Zombie process is dead process that has completed execution but still has an entry in the process table. Zombie process do not use any of the system resources.

More information about zombie process and how to remove it: http://en.wikipedia.org/wiki/Zombie_process

'top' command can be used to find out the resource usage of the process.

siranjeevi 06-14-2010 07:51 AM
Quote:
Originally Posted by vikas027 (Post 4003005)
I would suggest you to look at PPIDs of the zombie processes and then look for their orgination. We can then dig the issue further.
Their parent process is 31444

vikas027 06-14-2010 08:07 AM
Quote:
Originally Posted by siranjeevi (Post 4003042)
Their parent process is 31444
Dear Siranjeevi,

This will not serve our purpose.

Please post output of
Code:

ps -aef | grep 31444
lsof -p 31444

siranjeevi 06-14-2010 08:29 AM
Quote:
Originally Posted by vikas027 (Post 4003057)
Dear Siranjeevi,

This will not serve our purpose.

Please post output of
Code:

ps -aef | grep 31444
lsof -p 31444
I am sorry VIKAS just now i killed that parent process and all those zombie process have been killed so i cannot get it.


And i have found that if we kill the parent process of those zombie process the zombie process is completely removed from the registry.
This is a new way to kill(remove from registry) the zombie process.

siranjeevi 06-14-2010 08:32 AM
Quote:
Originally Posted by vikas027 (Post 4003057)
Dear Siranjeevi,

This will not serve our purpose.

Please post output of
Code:

ps -aef | grep 31444
lsof -p 31444
Can you please tell is it possible for the zombie process to make the server load unstability?..

timmeke 06-14-2010 09:52 AM
The "unstability" of the load percentage is most likely harmless or even normal behaviour.
But please post the output of the ps and lsof commands posted by Vikas027, so we can help you find the cause of the zombies.
Normally, processes clean up their zombie child processes in time and fast enough for you not to see them appear. The fact that several are showing, could mean that the parent process isn't doing its job, is waiting for something (like a signal) to clean up and exit, etc.
But if we don't know which process you're talking about, we can't help you figure out what is going wrong.

siranjeevi 06-14-2010 10:42 AM
Quote:
Originally Posted by timmeke (Post 4003152)
The "unstability" of the load percentage is most likely harmless or even normal behaviour.
But please post the output of the ps and lsof commands posted by Vikas027, so we can help you find the cause of the zombies.
Normally, processes clean up their zombie child processes in time and fast enough for you not to see them appear. The fact that several are showing, could mean that the parent process isn't doing its job, is waiting for something (like a signal) to clean up and exit, etc.
But if we don't know which process you're talking about, we can't help you figure out what is going wrong.
Sorry, actually i killed all that PPID, its okay i will post a topic if i again a get more number of zombie processes in the registry.

Thanks,


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