Debugging Memory on Linux

Petr explains how programmers can prevent nasty program memory bugs.


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missing "static data"?

Anonymous's picture

should you have on the picture also "static data" ?

Re: Debugging Memory on Linux

Anonymous's picture

Dear Mr Petr,

I was reading your article on 'Debugging Memory on Linux' on Linux


Recently we have a problem with memory on our Linux machine with 'out

of memory' crashes on one of our application software. I noticed that

the system admin has changed our stacksize limit to unlimited from

8192k. And ever since, all of us had 'out of memory' errors whenever

we at at about 950+M memory usage. We have a 3G memory for our Linux

machines. The system admin stand was that changing the stacksize to

unlimited should not cause this error. My guess is that setting the

stacksize to unlimited reserved 32bit or 2G of memory, leaving 1G

memory for user. That is why it crashes out of memory. On the other

hand, the system admin also claims that it works fine for Solaris when

the stacksize is set to unlimited. My guess is again on the larger

memory available for Solaris, so reserving 32bit or 2G for stack does

not take away so much resources from the available user memory.

I would appreciate your advice on that. I do not see out of memory

problem due to unlimited stacksize being addressed and would like to

know more about it. I hope you can enlighten me on that.

In addition, will most application software uses more user memory than

kernel memory? Can I say that compilers will need more of kernel


Thanks in advance and best regards,