Mine does this as well. I'm using an archaic prerelease version of
Fedora, so I'm not surprised. I have been able to isolate it to firefox
and thunderbird running out of memory, causing excessive swap use and
thrashing. I close both apps, let VM recover, then restart both. I
also have another issue (can't remember the bug I posted), but the
system can't spawn a shell after a few days due to some memory issue. I
guess I should reinstall :)
Try using iostat and vmstat when the system is happy and when it is
under stress and compare them (esp vmstat). Post results here. I find
"vmstat 5 10" or even "vmstat 2 10" to be very useful.
George Toft, CISSP, MSIS
623-203-1760
Josef Lowder wrote:
> .
> My system cruises along fine for days without any CPU overload
> ('top' normally shows CPU usage at about 2%) ... and then something
> happens (I don't know what) that causes the CPU% (as shown in the
> 'top' results below) to shoot up to 90+%.
>
> How can I figure out what causes this aberration?
> And is there some way to unclog it without having to reboot?
>
>
> top - 12:17:28 up 7 days, 50 min, 3 users, load average: 2.08, 2.08, 2.25
> Tasks: 87 total, 1 running, 86 sleeping, 0 stopped, 0 zombie
> Cpu(s): 50.7% us, 4.5% sy, 4.9% ni, 39.6% id, 0.1% wa, 0.1% hi, 0.0% si
> Mem: 515484k total, 447644k used, 67840k free, 78252k buffers
> Swap: 2096440k total, 79664k used, 2016776k free, 130016k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 3098 root 25 0 80492 62m 4460 S 98.9 12.5 5233:50 X
> 1 root 16 0 1560 480 460 S 0.0 0.1 0:01.76 init
> 2 root 34 19 0 0 0 S 0.0 0.0 0:00.34 ksoftirqd/0
> 3 root 10 -5 0 0 0 S 0.0 0.0 0:03.16 events/0
> 4 root 10 -5 0 0 0 S 0.0 0.0 0:00.01 khelper
> 5 root 18 -5 0 0 0 S 0.0 0.0 0:00.00 kthread
> 7 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kacpid
> 81 root 10 -5 0 0 0 S 0.0 0.0 0:00.47 kblockd/0
>
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