Re: Causeless CPU load waves in backend, on windows, 9.5.5 (EDB binary).

05.02.2017 17:10, I wrote:
[...]
> And yes, running Process Explorer gave some new and unexpected input.
> During the period of this strange high load it claims 40% CPU is used by
> interrupts (normally 0.01%) and 3% used by backend postgres.exe
> (normally approx 0%). I'd guess this means some problem happening in the
> OS (which hosts this postgres.exe), probably related to network
> communication? (Because nothing else seems likely related to interrupts
> in such scenario?)

Additionally, I've now got a kernrate viewer reports, one for high load,
and one for normal load period, attached below. Here, tcpip shows some
more kernel activity during the problematic period, but the difference
is not so huge.

Time 36348 hits, 25000 events per hit --------
Module Hits msec %Total Events/Sec
intelppm 35048 45640 96 % 19198071
hal 1030 45640 2 % 564198
ntkrnlpa 204 45640 0 % 111744
tcpip 20 45640 0 % 10955
win32k 18 45640 0 % 9859
afd 6 45640 0 % 3286
ipnat 6 45640 0 % 3286
NDIS 4 45640 0 % 2191
......

Time 37227 hits, 25000 events per hit --------
Module Hits msec %Total Events/Sec
intelppm 35856 46828 96 % 19142393
hal 1089 46828 2 % 581382
ntkrnlpa 229 46828 0 % 122255
win32k 29 46828 0 % 15482
tcpip 9 46828 0 % 4804
NDIS 4 46828 0 % 2135
afd 3 46828 0 % 1601
psched 3 46828 0 % 1601
ipnat 2 46828 0 % 1067

Thank you.

Nikolai

>
> The screenshot: https://yadi.sk/i/hC8FMZCE3CyzPs
>
>
> Thank you.
>
> Nikolai
>
>
>>
>> Andres
>>
>