bug--wrong Kernel statistic in Version 2.6.39-400.x.x between Oracle Linux 5.9 and Oracle Linux 6.4
Reference from:
wrong Kernel statistic in Version 2.6.39-400.x.x (Doc ID 1552713.1)
Suitable for:
Linux os-version Oracle Linux 5.9 with Unbreakable Enterprise Kernel [2.6.39] to Oracle Linux 6.4 with Unbreakable E Nterprise Kernel [2.6.39] [Release ol5u9 to Ol6u4]
Linux x86-64
Linux x86
Symptoms:
When running continuously, both Mpstat and SAR would occasionally report 0% for all of the various CPU times, including Idle. A single Mpstat would
Report odd usage even on a mostly idle machine, for example:
Linux 2.6.39-400.17.2.el6uek.x86_64 (test.oracle.com)
11:14:25 CPU%usr%nice%sys%iowait%irq%soft%steal%guest %idle
11:14:25 All 3.44 0.10 4.38 3.97 0.00 0.06 50.82 0.00 37.23
Change:
The system was upgraded to a UEK kernel with a version later than 2.6.39-400
Reason:
unpublished BUG 16567925-incorrect CPU utilization STATS with 2.6.39-400.17.1
Solution:
Upgrade to Kernel 2.6.39-400.22.1 or later.
"Translated from MoS article" Bug--wrong Kernel statistic between Oracle Linux 5.9 and Oracle Linux 6.4
