On Mon, 2008-04-28 at 19:21 +0530, Manish Kathuria wrote: > Okay a similar thing has happened with me twice recently. I left my > laptop running F8 ( 2.6.24.4-64.fc8 x86_64 kernel) on with Firefox, > with multiple sites opened, Evolution and maybe some small > applications > like a xterm. When I came back after 4-5 hours, I found that the > system > was frozen and I could not access it either through the GUI where I > was > working or through any of the consoles. None of the keys or key > combinations were working. I could ping it from the other system but > could not access it through SSH also and was forced to switch off the > power and reboot it. > > In the both the instances, after rebooting the system I examined the > system monitoring graphs I generate using a program called systemgraph > and discovered that over a 3 hour period: > > 1. The physical memory used increased to 2414 MB out of a total of > 2508 > MB (as shown by free command). I have 2.5 GB of RAM installed. > > 2. The swap used had increased to 1999.32 MB against the available > swap > space of 2047MB. > > 3. The CPU context switches had increased to a maximum of about 54,000 > per second as compared to the average of about 4500-5000. Similarly > the > pages in and out had increased to about 1700 and 2300 per second > against > the average values between 20-30 per second. > > 4. The disk I/O also showed a 100 times increase and the load average > also increased manifold > > 5. However, there was no significant change in number of processes or > number of open files. > > I tried to find out if there was any data regarding resource > utilization > by various processes during this period but could not find any and > therefore I was unable to pinpoint the cause and was suspecting some > kernel bug. But looking at your mail, I think it could be firefox > which > is causing the problem. However, no idea why. Maybe someone can > explain > this. > > -- > Manish Thanks for the great contribution. Ok, our theories point to: - Firefox bug - Kernel bug I discarded the kernel because this happens when I use the pre-installed and the most recent kernel. This didn't happen when I installed fedora 8, when it was released... so, that's why. I'll keep on reading and see what others think. Thank you soo much. -- Renich Bon Ciric <renich@xxxxxxxxxxxxxxxx> Woralelandia
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