[ale] md0 tasks taking 60-80% of CPU

[JK]

Michael Still wrote:

>can you cat /proc/sys/dev/raid/speed_limit_max ?
>
It's 200000 (200K). Is that low?

Thanks,

-- JK

> If it's low then echo
>a big number in there and see if it makes a diff.
>
>On 5/11/06, Christopher Fowler <cfowler at outpostsentinel.com> wrote:
>  
>
>>How slow is this machine?  I've loaded up PIV's with SATA drives using a
>>tarball on md0 and the resync usually takes about 1 hour.
>>My drives are 200GB and almost all is used for the raid.
>>
>>What concerns me is that yours is taking sooooooooo long to rebuild.
>>
>>On Thu, 2006-05-11 at 11:48, JK wrote:
>>    
>>
>>>Here they are. I'm guessing the "resync" state has something
>>>to do with the CPU usage...
>>>
>>>--------------/proc/mdstat:---------------
>>>
>>>Personalities : [raid1]
>>>md0 : active raid1 hda3[0] hdd3[1]
>>>      155637632 blocks [2/2] [UU]
>>>      [============>........]  resync = 63.2% (98368448/155637632)
>>>finish=352.7min speed=2703K/sec
>>>md1 : active raid1 hda1[0] hdd1[1]
>>>      128384 blocks [2/2] [UU]
>>>
>>>unused devices: <none>
>>>
>>>---------------mdadm -D:-----------------
>>>
>>>/dev/md0:
>>>        Version : 00.90.01
>>>  Creation Time : Thu Mar 24 19:26:08 2005
>>>     Raid Level : raid1
>>>     Array Size : 155637632 (148.43 GiB 159.37 GB)
>>>    Device Size : 155637632 (148.43 GiB 159.37 GB)
>>>   Raid Devices : 2
>>>  Total Devices : 2
>>>Preferred Minor : 0
>>>    Persistence : Superblock is persistent
>>>
>>>    Update Time : Thu May 11 14:42:32 2006
>>>          State : active, resyncing
>>> Active Devices : 2
>>>Working Devices : 2
>>> Failed Devices : 0
>>>  Spare Devices : 0
>>>
>>> Rebuild Status : 63% complete
>>>
>>>    Number   Major   Minor   RaidDevice State
>>>       0       3        3        0      active sync
>>>       1      22       67        1      active sync
>>>
>>>
>>>Robert Story wrote:
>>>
>>>      
>>>
>>>>On Thu, 11 May 2006 10:42:30 -0400 Michael wrote:
>>>>MS> can you cat /proc/mdstat for us?
>>>>
>>>>and 'mdadm -D /dev/md0'
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