问题描述
尽管此期间我的CPU持续稳定地
I'm wrapping my head around this issue with the CPU Balance constantly going down although my CPU during this time is <40% consistently.
我正在将t2.medium与MySQL配合使用，根据此页面，难道不是如果我<40％，我的CPU积分会增加吗?
I'm using a t2.medium with MySQL and according to this page, shouldn't it be that if I'm <40%, my CPU Credits will increase?
参考: http://docs.aws.amazon .com/AWSEC2/latest/UserGuide/t2-instances.html
推荐答案
t2.medium的基准性能为40％CPU利用率，范围为0％至200％，因为该计算机有2个核心.
The baseline performance of a t2.medium is 40% CPU utilization on a scale of 0% to 200%, because the machine has 2 cores.
从0％到100％的比例，就像Cloudwatch中显示的那样，为20％.
On a scale of 0% to 100%, like the one shown in Cloudwatch, it's 20%.
这可以通过以下计算来说明:
This can be illustrated with the following calculations:
以100％运行的单核每小时消耗60个积分(每分钟1个积分).这是CPU信用的定义.
A single core running at 100% consumes 60 credits per hour (1 credit per minute). This is the definition of a CPU credit.
两个都以100％运行的内核每小时消耗120个积分(每个内核每分钟1个积分=每分钟2个积分).
Two cores both running at 100% consume 120 credits per hour (1 credit per minute per core = 2 credits per minute).
t2.medium每小时可赚取24个学分.
A t2.medium earns 24 credits per hour.
基准绩效与获得学分的速率直接相关...而24学分意味着24分钟对一个核心的100％使用率.
The baseline performance is directly related to the rate at which credits are earned... and 24 credits means 24 minutes of 100% utilization of one core.
因此，为防止余额不断接近零的最大可持续利用率是其中之一:
Therefore, the maximum sustained utilization to prevent the balance from continually approaching zero is one of these:
-
24÷60 = 40％(一个核心使用了那么多，另一个核心处于空闲状态)
24 ÷ 60 = 40% (one core using this much, the other core idle)
24÷120 = 20％(两个内核都使用了这么多内核)
24 ÷ 120 = 20% (both cores using this much, each)
...或任何组合，例如一个内核的10％和另一个内核的30％.
...or any combination, such as 10% of one core and 30% of the other.
如果这给您的印象是发生了令人不快的事情……那不是:t2.small(单核计算机)的基准是1核的20％. t2.medium的基准价格(价格的两倍)是后者的两倍-1核的40％ 或2核的20％.
If this gives you the impression that there's something disingenuous going on... there isn't: the baseline of the t2.small (a single core machine) is 20% of 1 core. The baseline of the t2.medium (at twice the price) is twice that much -- 40% of 1 core or 20% each of 2 cores.
这篇关于AWS RDS t2.medium CPU积分低，尽管CPU不高的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！