Unix Memory Hog Finder

Return all processes memory information

subprocess.Popen("ps -u %s -o rss”)

Save a process class into a Parent/Child Structure

Parent

   -- Child

      --Child

        --Child

   -- Child

The process class has information such as current memory size, users, PID, PPID. I also implemented a timestamp and memory size for every process in case a process “bloated” up

Algorithm:

ParentProcessArray = []

For all processes:

   // IF parent PID is one then this is a parent process

   if process.PPID == 1:

      ParentProcessArray.append(process)

      break

   for all in ParentProcessArray:

     if process.PID == ParentProcessArray[i]

      ParentProcessArray.addchild(process)

             break;

// For Recursive Print Function:

// RETURN ALL CHILDREN FROM A PARENT RECURSIVELY

 def GetChildren(self,lvl=0):

        global ListOfChildren

        global Memcount

        if lvl == 0:

            ListOfChildren = []           

            Memcount = self.GetHighestRSS()

        for child in self.ListOfChildProcesses:

            child.lvl = lvl + 1           

            Memcount = Memcount + child.GetHighestRSS()

            ListOfChildren.append(child)

            if child.HasChild():

               child.GetChildren(lvl + 1)

        if lvl == 0:

            self.ParentProcTotalMem = Memcount

            Memcount = 0

        return ListOfChildren

This script logs all of the processes and how much memory is being used on a box. This is a very useful script and the algorithm of how it works is in the snippet above. It iterates through all processes. If it is a parent it puts it in the global parent array. For all processes that is a child of a parent it gets put into a parent with the recursive add child method.