Hi there, Swapped memory indicates sections of memory that have been paged out (swapped) of core and into disk. Essentially, a running system only has so much room in physical memory (RAM) in which to run things; when the total memory requirements of the tasks running on the system exceed the maximum size of physical memory, the OS will write out sections of memory to disk for applications that are sleeping in order to free up sections of RAM that running applications need. It is essential that this process does not happen too frequently, as the OS will spend too much time swapping memory and not enough time running jobs, a condition known as 'thrashing'. If your system has a tendency to trash, it's a good sign it needs more RAM.
There are ways to identify swapped memory, but the details vary by OS. The 'top' program will give you a realtime report of memory usage, including swap; Ganglia also tracks this variable, and /proc/swaps on Linux will provide info about swap as well. hth, Klaus On 6/29/08 8:04 AM, "richard pan" <[EMAIL PROTECTED]>did etch on stone tablets: > Hi, I'm a new in a cluster computing and found some basic problem. Hopefully > my questions are not too dummy for you guys. > > What's the meaning of memory swapped and is there a way that I can count it? > > Thank you > > A life without knowing anything is not a life at all. > > Live your life with your own decision so you will never regret what you have > done when you look back. > > > > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > _______________________________________________ > Ganglia-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ganglia-general ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
