memory issue about x-windows in Linux

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memory issue about x-windows in Linux

    I know it is not an osgEarth problem. Just want to know anyone here may met the same problem.
    We use reahat linux 6.5 to run our osgEarth app .The desktop is kde4.3.4. . After 7 to 20 days,we found the X-windows Process (X) suddenly took all of system's memory ,and force linux to kill the process itself ,which result to force the redhat back to it's login windows.
     I have observe both the osgEarth app and X problem every single day,it seems every stable ,not any trace of memory leak problem.Then just one short moment,the X process suddenly eats up all system memory .
    My question is what the link between osg(or openGL) and x-windows?Is it because our app has some memory leak problem to make the X process eat up too many memory ?Because the osg and and x-windows seems share the same display resource.It means when osg's frame is low,the X-windows performance seems low with the osg.
    Or just the X process cause the problem only due to itself?


Thank you!