On 10/25/2012 10:34 AM, Michael Torrie wrote: > When everything hangs, can you kill the java compile process immediately > and have everything unfreeze fairly instantly? Or does it take a while > for things to settle down? Is your hard drive light going light mad > when things are hung? What is your load average during the hang? Are > any processes in the "D" or uninterruptible sleep stage? If you run top > and sort by memory usage, how much VSS/Virt are your largest processes > (shift-m to sort by that)? What is your swap file usage at that point?
Also, top gives you the percentage of the time processes are in i/o waiting on the 3rd line. A higher i/o wait percentage starving for i/o, perhaps due to thrashing. And just to explain the load average, the load average is roughly the number of processes waiting for i/o (or something) before the scheduler can run them again. The higher the load average, typically the higher the amount of thrashing going on. Or you've got major problems in the i/o subsystem, like disk errors, or nfs went away. That sort of thing. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
