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Oracle Linux: Runq-sz Very High in SAR Report (Doc ID 2706890.1)

Last updated on JUNE 07, 2021

Applies to:

Linux OS - Version Oracle Linux 7.0 and later
Linux x86-64

Symptoms

CPU utilization is very less, but runq-sz is very high. See the below data.

03:00:01 AM CPU %usr    %nice     %sys    %iowait     %steal     %irq     %soft    %guest    %gnice    %idle
04:50:01 PM 0   3.05    0.00      2.07    0.79        0.00       0.00      0.05      0.00     0.00      94.04
04:50:01 PM 1   3.05    0.00      2.21    0.97        0.00       0.00      0.02      0.00     0.00      93.75
04:50:01 PM 2   3.33    0.00      2.13    0.71        0.00       0.00      0.02      0.00     0.00      93.81
04:50:01 PM 3   3.07    0.00      2.21    0.85        0.00       0.00      0.02      0.00     0.00      93.85

runq size is more than the number of CPU's available i.e. 4. The load average is low. There are no processes in blocked state. 

03:00:01 AM     runq-sz        plist-sz      ldavg-1      ldavg-5     ldavg-15   blocked
04:50:01 PM      9                845           1.11         1.08     0.91         0
05:00:01 PM      19               853           3.66         1.80     1.33         0
05:10:01 PM      16               857           1.12         1.06     1.10         0



Cause

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In this Document
Symptoms
Cause
Solution


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