Re: [Condor-users] Computing speed slows down gradually.

[Clendon Gibson <bsandyman@xxxxxxxxx>]

Hi Genie,

It is not clear to me if you mean the memory of the process is returned after the process is complete or something else. A program that is having a memory leak will return its memory to the OS after it is terminated.

The way to check for a memory leak is to check memory usage at several points throughout the runtime, but before the program unloads, or is terminated. If it constantly goes up, then you may have a memory leak. (It may also be that the program is creating large data structures as it processes and that the memory is not leaking.)

Hope this helps.

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From: Genie Jhang <geniejhang@xxxxxxxxxxx>
To: Condor-Users Mail List <condor-users@xxxxxxxxxxx>
Sent: Sun, January 24, 2010 2:05:16 PM
Subject: Re: [Condor-users] Computing speed slows down gradually.

Thanks, Ian.

 

After I read your reply, I checked the machines.

 

It has 2 dual-core 3.0GHz Xeon CPUs, and 2GB memory,

 

and when the machine works, it only takes about 160MB of memory.

 

I first though that when the job ends, it doesn't fully return the occupied memory.

 

So, I also checked it but no memory leak was found.

 

And I also set require one cpu for one job, it can't come from sharing cpus.

 

Still, I submit jobs, computing speed getting slower.

 

So, first job ends whthin about 1days but the larger the job number, the longer it takes time to be ended.

 

What do you think is problem?

 

Anyone else, except Mag Gam, doesn't have problems like this?