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

[Kostiantyn Ponomarenko]

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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