[Voyage-linux] Cron 100% CPU
Teco Boot
(spam-protected)
Fri Aug 10 14:48:48 HKT 2012
Is /var/spool/cron cleaned up?
Can you run with debug on?
Teco
Op 7 aug. 2012, om 15:24 heeft bentscrewdriver het volgende geschreven:
> Okay, this one still has me puzzled. I've downgraded the net6501 to
> 0.7.5 with the same results. I can consistently duplicate this issue
> by performing a fresh install, installing only keepalived and haproxy,
> rebooting and cron start spiking to 100%, at what looks like, each
> wakeup. The odd thing is that if I remove those two packages and
> reboot cron still spikes. I then clear out /etc/crontab and
> /etc/cron.daily, restart cron - and it still spikes. The only thing
> I've found to stop it is another fresh install or /etc/init.d/cron
> stop (of course).
>
> Any ideas on this? Punky - can you duplicate it on your 6501?
>
> On Fri, Jul 27, 2012 at 11:06 AM, bentscrewdriver
> <bentscrewdriver at gmail.com> wrote:
>> I commented everything out in /etc/crontab and there are no other
>> crontabs for any users (/var/spool/cron/crontabs) so it shouldn't even
>> be running anything. This is why i am puzzled by the high usage.
>>
>> On Fri, Jul 27, 2012 at 10:54 AM, Teco Boot <teco at inf-net.nl> wrote:
>>> What is in /etc/crontab?
>>> What happens if you run the cron commands by hand?
>>>
>>> Teco
>>>
>>> Op 27 jul. 2012, om 16:26 heeft bentscrewdriver het volgende geschreven:
>>>
>>>> I've stopped keepalived as well as haproxy and cron still spikes to
>>>> 100% and stays there for a minute or so. Any other ideas? lsof
>>>> doesn't show anything different...thanks.
>>>>
>>>> top - 21:47:06 up 10 days, 22:47, 3 users, load average: 0.30, 0.44, 0.48
>>>> Tasks: 44 total, 2 running, 41 sleeping, 0 stopped, 1 zombie
>>>> Cpu(s): 67.2%us, 32.5%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
>>>> Mem: 2075148k total, 130808k used, 1944340k free, 256k buffers
>>>> Swap: 0k total, 0k used, 0k free, 103936k cached
>>>>
>>>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
>>>> 22561 root 20 0 2120 492 372 R 100 0.0 7:51.65 cron
>>>> 29911 root 20 0 2372 1032 820 R 1 0.0 8:42.16 top
>>>> 4 root 20 0 0 0 0 S 0 0.0 4:04.04 kworker/0:0
>>>> 1 root 20 0 2072 672 580 S 0 0.0 0:20.41 init
>>>> 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd
>>>> 3 root 20 0 0 0 0 S 0 0.0 0:00.01 ksoftirqd/0
>>>> 5 root 20 0 0 0 0 S 0 0.0 0:00.06 kworker/u:0
>>>> 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
>>>> 7 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1
>>>> 8 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/1:0
>>>> 9 root 20 0 0 0 0 S 0 0.0 0:00.01 ksoftirqd/1
>>>> 10 root 20 0 0 0 0 S 0 0.0 0:05.88 kworker/0:1
>>>> 11 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper
>>>> 12 root 20 0 0 0 0 S 0 0.0 0:00.49 kdevtmpfs
>>>> 13 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/u:1
>>>> 123 root 20 0 0 0 0 S 0 0.0 71571:58 sync_supers
>>>> 125 root 20 0 0 0 0 S 0 0.0 0:00.09 bdi-default
>>>>
>>>>
>>>> p
>>>>
>>>> On Thu, Jul 26, 2012 at 9:04 PM, Kim-man 'Punky' TSE
>>>> <punkytse at punknix.com> wrote:
>>>>> On 7/27/2012 12:34 AM, bentscrewdriver wrote:
>>>>>>
>>>>>> 26652 ? Ss 0:36 /usr/sbin/keepalived
>>>>>> 26654 ? S 0:39 /usr/sbin/keepalived
>>>>>> 26655 ? S 6:57 /usr/sbin/keepalived
>>>>>> 29529 ? Rs 4:29 /usr/sbin/cron -L 2
>>>>>
>>>>> As shown, cron and keepalived spend much more user time than others. May be
>>>>> you should check what you have done with keepalived first.
>>>>>
>>>>> --
>>>>> Regards,
>>>>> Kim-man "Punky" Tse
>>>>>
>>>>> * Open Source Embedded Solutions and Systems
>>>>> - Voyage Linux (http://linux.voyage.hk)
>>>>> - Voyage ONE (http://linux.voyage.hk/voyage-one)
>>>>> - Voyage MPD (http://linux.voyage.hk/voyage-mpd)
>>>>> * Voyage Store (http://store.voyage.hk)
>>>>>
>>>>>
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