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[mongodb-Usuario] Re: wiredtiger cache rendimiento

To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Subject: [mongodb-Usuario] Re: wiredtiger cache rendimiento
From: Weishan Ang <weishan.ang@xxxxxxxxx>
Date: Sat, 19 Aug 2017 16:35:30 -0700 (PDT)
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*Hi Brian,

Puede defines *cache la actividad complace? Lo es *cache desahucio?

hay 2 parámetros que provocarán *cache desahucio. Desahucio_desahucio_y gatillo 
sucio_gatillo.Creo el *default punto de gatillo es 95% y 20%.

En jueves, 17 agosto 2017 20:32:01 *UTC+1, Brian *Dentino escribió:
>
> estoy intentando diagnosticar algunos asuntos de rendimiento intermitente nosotros'*ve sido 
> experimentando con nuestra aplicación sobre el pasado pocos días. He *noticed 
> que estos asuntos son *correlated con niveles altos de *mongodb *cache actividad 
> y culpas de página. Qué parece inusual sobre esto a mí es que el *cache es 
> configurado para hasta 37GB de memoria, y ni siquiera está utilizando 30GB. Es este 
> normal de ver *heavy *cache actividad así cuándo el *cache no es incluso 
> cerrar a lleno?
>
> He sujetado *graphs de *cache actividad, culpas de página, y *cache medida. Cualquier 
> *guidance sería mucho apreciado.
>
>

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Hi Brian,

Can you define cache activity please? Is it cache eviction?

There are 2 parameters that will trigger cache eviction. eviction_dirty_trigger 
and eviction_trigger.I believe the default trigger point is 95% and 20%.

On Thursday, 17 August 2017 20:32:01 UTC+1, Brian Dentino wrote:
>
> I am trying to diagnose some intermittent performance issues we've been 
> experiencing with our application over the past few days. I have noticed 
> that these issues are correlated with high levels of mongodb cache activity 
> and page faults. What seems unusual about this to me is that the cache is 
> configured for up to 37GB of memory, and is not even using 30GB. Is this 
> normal to see heavy cache activity like this when the cache isn't even 
> close to full?
>
> I've attached graphs of cache activity, page faults, and cache size. Any 
> guidance would be very much appreciated.
>
>

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