Bug 1251256

Summary:	Kernel Parameters don't match defaults in documentation
Product:	Red Hat Enterprise Linux 7	Reporter:	Aaron Luchko <aaron>
Component:	doc-Performance_Tuning_Guide	Assignee:	Milan Navratil <mnavrati>
Status:	CLOSED CURRENTRELEASE	QA Contact:	ecs-bugs
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	7.0	CC:	jbainbri, jsvarova, lwoodman, mnavrati
Target Milestone:	rc	Keywords:	Documentation
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Hardware:	Unspecified
OS:	Linux
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Last Closed:	2017-02-01 13:35:24 UTC	Type:	Bug
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Description Aaron Luchko 2015-08-06 20:19:25 UTC

Document URL: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Performance_Tuning_Guide/sect-Red_Hat_Enterprise_Linux-Performance_Tuning_Guide-Memory-Configuration_tools.html#sect-Red_Hat_Enterprise_Linux-Performance_Tuning_Guide-Configuration_tools-Configuring_system_memory_capacity

Section Number and Name: 4.3.2.3. Kernel parameters

Describe the issue: 

Doc states:
 ⁠msgmax
    Defines the maximum allowable size in bytes of any single message in a message queue. This value must not exceed the size of the queue (msgmnb). The default value is 65536.

But /proc/sys/kernel/msgmax contains 8192 (Rhel 6.5 has 65536)

Suggestions for improvement: The values should match

Comment 3 Milan Navratil 2016-04-26 09:01:14 UTC

Hi Aaron,

Thank you very much for taking the time to file this bug and sorry for being unresponsive.

I'll republish the Red Hat Enterprise Linux 7 Performance Tuning Guide as soon as I have the update verified by a Red Hat subject matter expert.

I'll post a link to the fixed book as soon as it appears on the Customer Portal.

Thanks again.

Comment 9 Milan Navratil 2017-02-01 13:35:24 UTC

The updated section 5.5.3. Kernel Parameters is now available on the Red Hat Customer Portal:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Performance_Tuning_Guide/sect-Red_Hat_Enterprise_Linux-Performance_Tuning_Guide-Configuration_tools-Configuring_system_memory_capacity.html#sect-Red_Hat_Enterprise_Linux-Performance_Tuning_Guide-Configuring_system_memory_capacity-Kernel_parameters