This discussion is archived
4 Replies Latest reply: Oct 16, 2012 11:26 PM by Dude! RSS

OEL LOAD AVERAGE IS HIGH

773757 Newbie
Currently Being Moderated
Hi All,
Our Oracle application(R12.1.3) runs on OEL 5.4 64bit.When i issue top command is output is as follows.
top - 17:56:39 up 17 days, 21:38, 1 user, load average: 432.02, 431.64, 431.27
Tasks: 2846 total, 1 running, 2838 sleeping, 7 stopped, 0 zombie
Cpu(s): 0.9%us, 2.3%sy, 0.0%ni, 95.9%id, 0.8%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 32469740k total, 32384880k used, 84860k free, 1471120k buffers
Swap: 67111496k total, 108736k used, 67002760k free, 22862096k cached


From the above output it seems that CPU is fine and we have no problem regarding the performance of the application .However my concern is load average .It is showing every high values .
load average: 432.02, 431.64, 431.27

How should i troubleshoot load average to normal.

Below is my Server CPU info

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 44
model name : Intel(R) Xeon(R) CPU E5649 @ 2.53GHz
stepping : 2
cpu MHz : 1596.000
cache size : 12288 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm
bogomips : 6336.51
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:


Please Guide me to bring load average below normal.


Thanks
Chowdary
  • 1. Re: OEL LOAD AVERAGE IS HIGH
    Dude! Guru
    Currently Being Moderated
    First of all, you need to understand what load average is. The load average values in top are the 1 , 5 and 15 minute load average intervals. Average load is not to be confused with CPU percentage. Load average measures all demand for CPU during a certain period of time, not just what was active. In a perfect scenario, average load matches the number of CPU's. If there is one CPU in the system and the 1 minute load average is 1.00, then the machine was 100 % busy and no process had to wait.

    There is no way to make any suggestion based on your top output to determine what needs to be done to optimize your system usage. You need to analyze the Database to draw any conclusions about what is causing the high load.
  • 2. Re: OEL LOAD AVERAGE IS HIGH
    Johan Louwers Explorer
    Currently Being Moderated
    Question is..... Even thought you notice the numbers as shown above... What is the user experience when working on the system... Donyou have performance issues and how are they showing?

    Regards,
    Johan Louwers.
  • 3. Re: OEL LOAD AVERAGE IS HIGH
    773757 Newbie
    Currently Being Moderated
    Well there is no perfomance issues with the application and database.Do i need to restart the server once.
  • 4. Re: OEL LOAD AVERAGE IS HIGH
    Dude! Guru
    Currently Being Moderated
    Check the following:

    http://en.wikipedia.org/wiki/Load_%28computing%29
    http://www.thegeekstuff.com/2011/03/sar-examples/

    Try other commands like "uptime" and compare the output.

Legend

  • Correct Answers - 10 points
  • Helpful Answers - 5 points