Red Hat Bugzilla – Bug 1251256
Kernel Parameters don't match defaults in documentation
Last modified: 2017-02-01 08:35:24 EST
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: 22.214.171.124. Kernel parameters
Describe the issue:
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
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.
The updated section 5.5.3. Kernel Parameters is now available on the Red Hat Customer Portal: