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How to Determine if Linux Control Groups Are Not Cleaned Up (Doc ID 2719410.1)

Last updated on OCTOBER 19, 2020

Applies to:

Big Data Appliance Integrated Software - Version 4.5.0 and later
Linux x86-64

Purpose

How to determine if Linux control groups are not cleaned up.

Details

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In this Document
Purpose
Details
 Background
 Checking for Empty Cgroup Structures
 Cleaning Up Empty Cgroup Structures
 Using lscgroup
 Installing libcgroup-tools on OL7
 Differences Between lscgroup Monitoring on OL7 vs OL6
 Frequently Asked Questions
 Are the settings used in, Impala and Yarn Jobs Have Degraded Performance Over Time On Systems with Heavy Linux Control Group Usage (Doc ID 2411555.1), optimum for every cluster?
 Is there a more preferred set of values for the two settings above?
 Are the settings provided in Impala and Yarn Jobs Have Degraded Performance Over Time On Systems with Heavy Linux Control Group Usage (Doc ID 2411555.1) dependent on OS version?
 Does this mean if a cluster is upgraded from Oracle Linux 6 to Oracle Linux 7 the NodeManager settings above do not have to be updated?
 If lscgroup shows a high number of cgroups does that indicate a problem?
 Is it normal for some nodes to have more cgroups than other?
References


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