DescriptionGeorge Angelopoulos
2017-05-02 12:20:38 UTC
Description of problem:
The settings applied by tuned-profiles-oracle are different from the settings recommended in knoledgebase solution (KCS) 39188
Tuning Red Hat Enterprise Linux for Oracle and Oracle RAC performance
https://access.redhat.com/solutions/39188
Version-Release number of selected component (if applicable):
all versions afaik
These are the values from the package compared to what they should be according to solution 39188
vm.swappiness = 1 <= should be 10
vm.dirty_ratio = 80 <= should be 40
kernel.shmmax = 4398046511104 <= should be calculated
kernel.shmall = 1073741824 <= should be calculated
kernel.sem = 250 32000 100 128 <= should be calculated
Either the tuned profile needs to change or our KCS.
I'm far from an expert in this, so I don't have a good suggestion. If there is some more information I can provide, please let me know.
Comment 10Jaroslav Škarvada
2018-06-06 15:46:30 UTC
I changed profile according to previous comments, upstream commit:
https://github.com/redhat-performance/tuned/commit/64517b7785d5f302f1029dc080d8e147646d5ef5
At the moment kernel.shmmax, kernel.shmall, and kernel.sem are preset, because it seems to be sufficient, but Tuned is capable of calculating them. If it is needed to dynamically calculate them, please let me know and provide the formulas.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:3172