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JVM in container calculates processors wrongly?


By : Mark V
Date : September 15 2020, 07:00 AM
it helps some times Being a developer of a large scale service (>15K containers running distributed Java applications in the own cloud), I also admit that so called "Java container support" is too far from being perfect. At the same time, I can understand the reasoning of JVM developers who implemented the current resource detection algorithm.
The problem is, there are so many different cloud environments and use cases for running containerized applications, that it's virtually impossible to address the whole variety of configurations. What you claim to be the "best practice" for most apps in Kubernetes, is not necessarily typical for other deployments. E.g. it's definitely not a usual case for our service, where most containers require the certain minimum guaranteed amount of CPU resources, and thus also have a quota they cannot exceed, in order to guarantee CPU for other containers. This policy works well for low-latency tasks. OTOH, the policy you've described, suits better for high-throughput or batch tasks.
code :
/*
 * PER_CPU_SHARES has been set to 1024 because CPU shares' quota
 * is commonly used in cloud frameworks like Kubernetes[1],
 * AWS[2] and Mesos[3] in a similar way. They spawn containers with
 * --cpu-shares option values scaled by PER_CPU_SHARES. Thus, we do
 * the inverse for determining the number of possible available
 * CPUs to the JVM inside a container. See JDK-8216366.
 *
 * [1] https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/#meaning-of-cpu
 *     In particular:
 *        When using Docker:
 *          The spec.containers[].resources.requests.cpu is converted to its core value, which is potentially
 *          fractional, and multiplied by 1024. The greater of this number or 2 is used as the value of the
 *          --cpu-shares flag in the docker run command.
 * [2] https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ContainerDefinition.html
 * [3] https://github.com/apache/mesos/blob/3478e344fb77d931f6122980c6e94cd3913c441d/src/docker/docker.cpp#L648
 *     https://github.com/apache/mesos/blob/3478e344fb77d931f6122980c6e94cd3913c441d/src/slave/containerizer/mesos/isolators/cgroups/constants.hpp#L30
 */


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Clicking contained element also effectively (but wrongly) clicks its container


By : user3185919
Date : March 29 2020, 07:55 AM
wish help you to fix your issue This is the problem page I'm developing. , Your can cancel event-bubbling by adding
code :
event.cancelBubble = true;

in C# and sqlite datetime values are wrongly inserted or wrongly queried


By : Rose Nasab
Date : March 29 2020, 07:55 AM
I wish this helpful for you data.Add("sayacTarihZamani", string.Format("{0:yyyy-MM-dd HH:mm:ss}", mydatetime));
worked all right.

JS script to calculates sum of amount calculates wrong


By : user2896555
Date : March 29 2020, 07:55 AM
should help you out I have prepared this jsfiddle that ilustrates how my script calculate twice the sum of each selected option attribute price. Please help me to solve this issue. , Try this,
code :
function update_amounts(){
var sum = 0.0;

$('#basketorder > tbody  > .product').each(function() {

    var optionsamount = 0.0;


    $(this).find('.selectedoptionselect option:selected').each(function(){
        optprice = $(this).attr('price');
        optionsamount+= parseFloat(optprice);    
    })

    var qty = $(this).find('.qty option:selected').val();
    var price = $(this).find('.price').val();
    var amount = (qty*price);
    sum+= (amount + optionsamount);

    $(this).find('.amount').text(''+ amount.toFixed(2));
});

$('.total').text(sum);

IE11 calculates the height of parent flex container incorrectly


By : mcarmack
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , When you use the height property, some browsers will interpret that as the limit. As an alternative, use min-height.
Instead of this:
code :
html {
  height: 100%;
}
body {
  height: 100vh;
  display: flex;
  flex-direction: column;
}
body {
  min-height: 100vh;      
  display: flex;
  flex-direction: column;
}
html {
  display: flex;
  flex-direction: column;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

Does generally RISC processors have lower power consumption than CISC processors?


By : arch83
Date : March 29 2020, 07:55 AM
I wish this help you No, they don't.
It was commonly believed in the past that RISC CPUs were more power friendly, mostly due to the large overhead of maintaining the large ROMs needed for CISC. However, a recent study comparing several workloads on multiple platforms finally ended that myth, stating:
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