A High Number of kworker and ksoftirqd Processes are Running on a Server, Which is Experiencing Degraded System Performance

(Doc ID 2309647.1)

Last updated on OCTOBER 10, 2017

Applies to:

Linux OS - Version Oracle Linux 6.7 with Unbreakable Enterprise Kernel [3.8.13] and later
Information in this document applies to any platform.

Symptoms

The system is a database server, and is experiencing degraded performance, and slow I/O.
There are high numbers of ksoftirqd and kworker processes running, as shown below:

[root@localhost~]# ps -ef|grep -i ksoftirqd|wc -l
97
[root@localhost ~]# ps -ef|grep -i kworker|wc -l
384

There is also a high system load relative to the number of CPUs present on the server, with load rapidly increasing over time.

e.g.:

[root@localhost ~]# uptime
16:52:46 up 8 min, 3 users, load average: 28.83, 7.52, 2.58

Cause

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