[ClusterLabs] Antw: Antw: notice: throttle_handle_load: High CPU load detected

[Kostiantyn Ponomarenko]

I think I wasn't precise in my questions.
So I will try to ask more precise questions.
1. why the default value for "load-threshold" is 80%?
2. what would be the impact to the cluster in case of "load-threshold=100%"?

Thank you,
Kostya

On Mon, May 25, 2015 at 4:11 PM, Kostiantyn Ponomarenko <
konstantin.ponomarenko at gmail.com> wrote:

> Guys, please, if anyone can help me to understand this parameter better, I
> would be appreciated.
>
>
> Thank you,
> Kostya
>
> On Fri, May 22, 2015 at 4:15 PM, Kostiantyn Ponomarenko <
> konstantin.ponomarenko at gmail.com> wrote:
>
>> Another question - is it crmd specific to measure CPU usage by "I/O wait"?
>> And if I need to get the most performance of the running resources in
>> cluster, should I set "load-threshold=95%" (or even 100%)?
>> Will it impact the cluster behavior in any ways?
>> The man page for crmd says that it will "The cluster will slow down its
>> recovery process when the amount of system resources used (currently CPU)
>> approaches this limit".
>> Does it mean there will be delays in cluster in moving resources in case
>> a node goes down, or something else?
>> I just want to understand in better.
>>
>> That you in advance for the help =)
>>
>> P.S.: The main resource does a lot of disk I/Os.
>>
>>
>> Thank you,
>> Kostya
>>
>> On Fri, May 22, 2015 at 3:30 PM, Kostiantyn Ponomarenko <
>> konstantin.ponomarenko at gmail.com> wrote:
>>
>>> I didn't know that.
>>> You mentioned "as opposed to other Linuxes", but I am using Debian
>>> Linux.
>>> Does it also measure CPU usage by I/O waits?
>>> You are right about "I/O waits" (a screenshot of "top" is attached).
>>> But why it shows 50% of CPU usage for a single process (that is the main
>>> one) while "I/O waits" shows a bigger number?
>>>
>>>
>>> Thank you,
>>> Kostya
>>>
>>> On Fri, May 22, 2015 at 9:40 AM, Ulrich Windl <
>>> Ulrich.Windl at rz.uni-regensburg.de> wrote:
>>>
>>>> >>> "Ulrich Windl" <Ulrich.Windl at rz.uni-regensburg.de> schrieb am
>>>> 22.05.2015 um
>>>> 08:36 in Nachricht <555EEA72020000A10001A71D at gwsmtp1.uni-regensburg.de
>>>> >:
>>>> > Hi!
>>>> >
>>>> > I Linux I/O waits are considered for load (as opposed to other
>>>> Linuxes) Thus
>>>> ^^ "In"
>>>>                               s/Linux/UNIX/
>>>>
>>>> (I should have my coffee now to awake ;-) Sorry.
>>>>
>>>>
>>>>
>>>>
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>>>
>>
>
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