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Disc I/O More Than 98% Please Help
My server is Dedicated but disc I/o is above 98% with low traffic. Attached screenshot for "iotop" and via server monitoring.I am using kloxo panel. [ http://imgur.com/9VfVXxa ] , [ http://imgur.com/PwylhST ]
Requires server restart to bring this to normal state. But after 12 hrs same situation.
Comments
First of all, I think you mean "disk." Secondly, I wouldn't be worried about 700 k/s constant write though.
EDIT: I just checked the second screenshot. Looking at the first one, I can tell you it definitely isn't Kloxo who is causing this.
That's high I/O utilization. What's your iowait look like? RAID configuration?
@jarland @doghouch I am using Raid 0. [ http://imgur.com/K16PIEd ] [ http://imgur.com/xQvrXUZ ]
Pink color indicates Disc I/O which is up to 98% and Iowait is in Green color which is approx 30% both are at same time period.
atop -d
This should help...
What panel is that out of curiosity?
Looks like virtualizor, can be wrong though.
it is possible one of the drives is failing.. smartctl output for each disk would help
The second screenshot? NewRelic server monitoring.
Looks pretty neat. Thanks.
New Relic is great, they have free server monitoring and free website 1-minute interval monitoring.
@exception0x876 tell me cmd to check disc failing for smartctl ... have have run smartctl -a /dev/sda and smartctl -a /dev/sdb are you talking abt that?? this is output for that. [ http://imgur.com/2pC4veU ]
@ZweiTiger command not found
then install it
This is output of smartctl -i, but the output of smartctl -a is needed for every disk you have
@exception0x876 This is a output of command "smartctl -a" [ http://imgur.com/tA3zBQy ]
use it for every disk in your system, i.e.
smartctl -a /dev/sda
smartctl -a /dev/sdb
and so on.
What is the output of:
cat /proc/mdstat
@exception0x876
These are replies for smartctl -a /dev/sda and smartcrt -a /dev/sdb
[http://imgur.com/r8tFCna ], [http://imgur.com/jFv9Y7p], [ http://imgur.com/hLQ980k ], [ http://imgur.com/oF6Nz7z ], [ http://imgur.com/rLxU0JD ]
@MarkTurner this is output of cat /proc/mdstat --> [ http://imgur.com/q5DRt93 ]
Are you running software RAID?
What is the output of:
cat /etc/fstab
@MarkTurner using raid 0 . and output is [ http://imgur.com/4OzA3y2 ]
This is with a hardware RAID controller?
Can you run this for 30 seconds and see what it generates:
while true;do date;ps axuf|awk '{if($8=="D") print $0;}';sleep 1;done
@MarkTurner how to run that ?
He can access disks via /dev/sda and /dev/sdb
I know which is bizarre if he is running hardware RAID0, but that fstab shows he is not mounting a software RAID device.
sda and sdb are showing as actual disks in the smartctl
So it seems that there is confusion as to what is actually setup.