VKTM - High CPU Usage On Linux Hosts

(Doc ID 2397170.1)

Last updated on MAY 23, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Linux x86-64

Symptoms

VKTM process consumed high CPU resources / degraded host response.

These tunable parameters from Doc ID 1992652.1 have no effect: 

_timer_precision : This sets how frequently (in milliseconds) VKTM wakes up and gets the time value.

_disable_highres_ticks : This disabled high resolution VKTM. With this set to TRUE, VKTM would only update every 100 milliseconds.

Changes

 Adding of LUN's to host

Cause

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