Home » Infrastructure » Linux » High Load Avarage
| High Load Avarage [message #526663] |
Wed, 12 October 2011 05:54  |
crussed_sonu
Messages: 51
Registered: July 2007
Location: Delhi
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Getting slow performance on server side ..
top - 18:17:59 up 37 days, 7:09, 5 users, load average: 10.09, 5.76, 4.43
Tasks: 642 total, 1 running, 641 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 0.0%us, 0.0%sy, 0.0%ni, 99.7%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.3%us, 0.3%sy, 0.0%ni, 99.0%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni, 96.3%id, 3.7%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu8 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu9 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu10 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu11 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu12 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu13 : 0.3%us, 0.0%sy, 0.0%ni, 99.3%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu14 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu15 : 0.0%us, 0.3%sy, 0.0%ni, 0.0%id, 99.0%wa, 0.3%hi, 0.3%si, 0.0%st
Mem: 16628888k total, 15230064k used, 1398824k free, 30148k buffers
Swap: 17434828k total, 1720068k used, 15714760k free, 5506416k cached
Please let me know how do i overcome the load ...
Regards,
Vimlendu
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| Re: High Load Avarage [message #526668 is a reply to message #526666] |
Wed, 12 October 2011 06:10  |
crussed_sonu
Messages: 51
Registered: July 2007
Location: Delhi
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load average: 10.09, 5.76, 4.43
The cpu utilization is only 2-5% only but when looking at the load avarage from top output.
it show 10 and some time it goes to 14 and that i server response is very slow .. we need to wait for ls -ltr command to execute.
Please let me know if any more info required
Regards,
Vimlendu
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| Re: High Load Avarage [message #526678 is a reply to message #526673] |
Wed, 12 October 2011 07:36 |
crussed_sonu
Messages: 51
Registered: July 2007
Location: Delhi
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Thats correct it is not oracle issue ...
but i have to solved the issue whether is realted to oracle or sysadmin(Linux) ... so please guide me in that case ..
we have 16GB of RAM .. and almost 15GB is used most of the time ..
can memory cause the load issue .. ? if yes then how to realse the memory apart from adding more RAM... ?
Regards,
Vimlendu
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| Re: High Load Avarage [message #526685 is a reply to message #526678] |
Wed, 12 October 2011 08:22 |
John Watson
Messages: 8966
Registered: January 2010
Location: Global Village
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Senior Member |
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Vimlendu, we already know that your discs are performing terribly. Leonid suspected this in your previous thread, and I told you how to calibrate them. Have you done that yet? No, I didn't think so.
As for RAM, you have more than enough. Run this,
cat /proc/meminfo
and interpret the output. Or ask your sysadmin to do it for you.
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| Re: High Load Avarage [message #526697 is a reply to message #526688] |
Wed, 12 October 2011 09:41 |
ThomasG
Messages: 3212
Registered: April 2005
Location: Heilbronn, Germany
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Senior Member |
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Well, the 99.0%wait on CPU 15 are definitely pointing do a I/O bottleneck. All the CPUs are idle because they wait for their I/O to finish.
Either because the disks are indeed broken, or there are queries that indeed saturate the disk controllers or the disks themselves.
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