RHEL 6 CPU load

Blake Hudson blake at ispn.net
Thu Nov 21 17:52:17 UTC 2013


Phil Mayers wrote the following on 11/21/2013 9:35 AM:
> On 21/11/13 14:57, - wrote:
>
>> Are others seeing the named process run at 130-180% on RHEL 6? We've
>
> No. Our RHEL6 boxes rune fine.
Fine here as well...

Here is a decently busy CentOS 6 system w/ latest BIND from RPM, 2x Xeon 
CPU E5-2640 (the cores typically run at 1200MHz).


   1  [|||||||||||||                                24.7%]   13 
[|||||||                                      12.1%]     Tasks: 411, 107 
thr, 446 kthr; 5 running
   2  [||||||                                       10.2%] 14 
[||                                            1.3%]     Load average: 
0.71 0.83 0.90
   3  [||||                                          6.5%] 15 
[|||                                           4.5%]
   4  [|||                                           4.5%] 16 
[||||                                          6.4%]
   5  [|||                                           4.4%] 17 
[||                                            1.9%]
   6  [|                                             0.6%] 18 
[||                                            3.2%]
   7  [|||                                           3.8%] 19 
[||                                            2.5%]
   8  [|                                             0.6%] 20 
[|                                             0.6%]
   9  [||                                            1.3%] 21 
[                                              0.0%]
   10 [                                              0.0%] 22 
[                                              0.0%]
   11 [|||||||                                      10.8%] 23 
[|                                             0.6%]
   12 [                                              0.0%] 24 
[                                              0.0%]
Mem[|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||34455/64375MB]
Swp[ 0/9607MB]

   PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM% TIME+  Command
  1862 named      20   0 1960M  203M  2900 S 10.8  0.3 46:47.44 ├─ 
/usr/sbin/named -u named
  1888 named      20   0 1960M  203M  2900 S  0.6  0.3 5:11.81 │  ├─ 
/usr/sbin/named -u named
  1887 named      20   0 1960M  203M  2900 S  0.0  0.3 0:07.57 │  ├─ 
/usr/sbin/named -u named
  1886 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.64 │  ├─ 
/usr/sbin/named -u named
  1885 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.95 │  ├─ 
/usr/sbin/named -u named
  1884 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.78 │  ├─ 
/usr/sbin/named -u named
  1883 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.46 │  ├─ 
/usr/sbin/named -u named
  1882 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.81 │  ├─ 
/usr/sbin/named -u named
  1881 named      20   0 1960M  203M  2900 S  1.3  0.3 1:43.79 │  ├─ 
/usr/sbin/named -u named
  1880 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.49 │  ├─ 
/usr/sbin/named -u named
  1879 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.51 │  ├─ 
/usr/sbin/named -u named
  1878 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.71 │  ├─ 
/usr/sbin/named -u named
  1877 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.73 │  ├─ 
/usr/sbin/named -u named
  1876 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.78 │  ├─ 
/usr/sbin/named -u named
  1875 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.49 │  ├─ 
/usr/sbin/named -u named
  1874 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.68 │  ├─ 
/usr/sbin/named -u named
  1873 named      20   0 1960M  203M  2900 S  1.3  0.3 1:43.57 │  ├─ 
/usr/sbin/named -u named
  1872 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.92 │  ├─ 
/usr/sbin/named -u named
  1871 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.60 │  ├─ 
/usr/sbin/named -u named
  1870 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.68 │  ├─ 
/usr/sbin/named -u named
  1869 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.87 │  ├─ 
/usr/sbin/named -u named
  1868 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.43 │  ├─ 
/usr/sbin/named -u named
  1867 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.68 │  ├─ 
/usr/sbin/named -u named
  1866 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.42 │  ├─ 
/usr/sbin/named -u named
  1865 named      20   0 1960M  203M  2900 S  0.0  0.3 1:43.49 │  ├─ 
/usr/sbin/named -u named
  1864 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.49 │  ├─ 
/usr/sbin/named -u named
  1863 named      20   0 1960M  203M  2900 S  0.6  0.3 1:43.76 │  └─ 
/usr/sbin/named -u named


And here's a less loaded CentOS 5 server (2x Xeon E5620 which typically 
runs at 1600MHz per core):
   1 [ 0.0%]     Tasks: 1962, 64 thr; 2 running
   2 [||||| 4.2%]     Load average: 0.48 0.44 0.50
   3 [|| 1.2%]
   4 [| 0.6%]
   5 [ 0.0%]
   6 [ 0.0%]
   7 [| 0.6%]
   8 [|| 1.2%]
   9 [ 0.0%]
   10 [||||||||||| 9.0%]
   11 
[|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 
84.4%]
   12 [|| 1.2%]
   13 [| 0.6%]
   14 [|| 1.2%]
   15 [| 0.6%]
   16 [|||| 2.4%]
Mem[|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||12019/24096MB]
Swp[| 4/1027MB]

   PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM% TIME+  Command
21487 named      15   0  637M  101M  2020 S  2.0  0.4 51h46:59 ├─ 
/usr/sbin/named -u named
21505 named      15   0  637M  101M  2020 S  0.0  0.4 6h19:07 │  ├─ 
/usr/sbin/named -u named
21504 named      15   0  637M  101M  2020 S  0.0  0.4 16:25.89 │  ├─ 
/usr/sbin/named -u named
21503 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:38 │  ├─ 
/usr/sbin/named -u named
21502 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:35 │  ├─ 
/usr/sbin/named -u named
21501 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:36 │  ├─ 
/usr/sbin/named -u named
21500 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:00 │  ├─ 
/usr/sbin/named -u named
21499 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:33 │  ├─ 
/usr/sbin/named -u named
21498 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:13 │  ├─ 
/usr/sbin/named -u named
21497 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:31 │  ├─ 
/usr/sbin/named -u named
21496 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:40 │  ├─ 
/usr/sbin/named -u named
21495 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:32 │  ├─ 
/usr/sbin/named -u named
21494 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:28 │  ├─ 
/usr/sbin/named -u named
21493 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:32 │  ├─ 
/usr/sbin/named -u named
21492 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:32 │  ├─ 
/usr/sbin/named -u named
21491 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:30 │  ├─ 
/usr/sbin/named -u named
21490 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:26 │  ├─ 
/usr/sbin/named -u named
21489 named      15   0  637M  101M  2020 S  0.0  0.4 2h49:38 │  ├─ 
/usr/sbin/named -u named
21488 named      15   0  637M  101M  2020 S  0.0  0.4 2h48:55 │  └─ 
/usr/sbin/named -u named


I would not directly compare the loads between these systems because 
they have a different workload and different versions of BIND. Roughly 
speaking, I would estimate the CentOS 6 system has ~ 5x the workload.


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