[CentOS] slugishness

Fri Jul 3 14:20:26 UTC 2009
Paul Bijnens <Paul.Bijnens at xplanation.com>

On 2009-07-03 16:02, Jerry Geis wrote:
>> />/ I have a 3G AM2 quad core CPU... x86_64 centos 5.3
>> />/ 
>> />/ 
>> />/ When I am doing backing up to my external USB drive
>> />/ my system becomes sluggish. Clicking on a thunderbird compose
>> />/ takes some time to pop up the window. Typeing doesnt keep up etc...
>> />/ 
>> />/ Is there something I can change so this backup doesnt slow my system
>> />/ down so much? I dont see HOW it can be taking so much CPU.
>> />/ top at times shows 0 idle or 11% idle from a USB backup.
>> />/ 
>> />/ Thanks for any suggestions.
>> /
>>   
> I have four gig RAM, I am just doing a "rsync -a /home 
> /mnt/external_usb/backup.XX.YY.2009"
> My server has RAID-1 SATA 1 TB drives (two of course for raid) and I am 
> doing a straight
> rsync to an external 1TB usb connected disk. Not doing any compression 
> at this time.
> 
> The "renice" did help some mentioned earlier...

"ionice" is very usefull in this case as well.

If possible try to find a solution using eSATA instead of USB, which would
work much smoother.


-- 
Paul Bijnens, Xplanation Technology Services        Tel  +32 16 397.525
Interleuvenlaan 86, B-3001 Leuven, BELGIUM          Fax  +32 16 397.552
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