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Poor performance on Oracle Linux server with high CPU utilization from kuma620 processes observed from top (Doc ID 2462895.1)

Last updated on OCTOBER 28, 2018

Applies to:

Linux OS - Version Oracle Linux 6.9 and later
Linux x86-64

Symptoms

A server running Oracle Linux 6.9 was experiencing performance issues on its running database applications, and extremely high CPU utilization.

Output captured from top shows the kuma620 process stuck at 99 to 100% CPU utilization over several hours

e.g.

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
28100 root 20 0 3312m 24m 17m S 99.7 0.0 47013:55 kuma620
28100 root 20 0 3312m 24m 17m S 99.9 0.0 47014:25 kuma620
28100 root 20 0 3312m 24m 17m S 99.6 0.0 47014:55 kuma620
28100 root 20 0 3312m 24m 17m S 99.9 0.0 47015:25 kuma620
28100 root 20 0 3312m 24m 17m S 100.4 0.0 47015:55 kuma620
28100 root 20 0 3312m 24m 17m S 100.2 0.0 47016:25 kuma620
28100 root 20 0 3312m 24m 17m S 100.2 0.0 47016:55 kuma620
28100 root 20 0 3312m 24m 17m S 100.2 0.0 47017:25 kuma620
28100 root 20 0 3312m 24m 17m S 99.7 0.0 47017:55 kuma620
28100 root 20 0 3312m 24m 17m S 99.5 0.0 47018:25 kuma620
28100 root 20 0 3312m 24m 17m S 99.7 0.0 47018:55 kuma620
28100 root 20 0 3312m 24m 17m S 99.4 0.0 47019:25 kuma620
28100 root 20 0 3312m 24m 17m S 99.2 0.0 47019:55 kuma620
28100 root 20 0 3312m 24m 17m S 99.0 0.0 47020:25 kuma620
28100 root 20 0 3312m 24m 17m S 100.6 0.0 47020:55 kuma620
28100 root 20 0 3312m 24m 17m S 100.3 0.0 47021:25 kuma620
28100 root 20 0 3312m 24m 17m S 100.7 0.0 47021:55 kuma620

Cause

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In this Document
Symptoms
Cause
Solution
References


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