In Azure there are several ways to implement your VM storage. I get a lot of complaints about slow storage in Azure. In this article I will try to explain why this might be slow, and what you can do about it. There are multiple locations where the limit might be hit.
So I will address all in the following topics. The first limitation might be coming from your virtual machine. Each type has its own total IOPS limit.
Thus by adding more disk or faster disk than the type and size allows will not make any speed difference in the end. And then there is host caching, that effects performance as well. A few examples:. These can deliver up to 3. So choosing the right VM is very important. If you have any virtual machines with unmanaged disks, it is important to keep in mind that each storage account has an IOPS limit of This means that 5 premium terabyte SSD disks will exceed this maximum.
Therefore it is recommended to use managed disk, besides all other benefits. Depending on the size this can increase up to IOPS. Premium disks do support higher IOPS and throughput.
In the following table you can review the performance of each disk. A new feature in preview now! This means that disks can burst for 30 minutes in a row when needed. At the moment of writing Ultra SSDs are still in preview only and are limited available. You are doing an excellent job by providing such data to the world.The performance diagnostics tool helps you troubleshoot performance issues that can affect a Windows or Linux virtual machine VM.
Supported troubleshooting scenarios include quick checks on known issues and best practices, and complex problems that involve slow VM performance or high usage of CPU, disk space, or memory. You can run performance diagnostics directly from the Azure portal, where you can also review insights and a report on various logs, rich configuration, and diagnostics data.
We recommend that you run performance diagnostics and review the insights and diagnostics data before you contact Microsoft Support. For Windows, Performance diagnostics is currently supported on VMs that have. Performance diagnostics installs a VM extension that runs a diagnostics tool that is named PerfInsights.
PerfInsights is available for both Windows and Linux. To install and run performance diagnostics, follow these steps:. If you want to use a single storage account to store the performance diagnostics results for multiple VMs, you can select a storage account by clicking the Settings button in the toolbar.
Click the OK button once you select the storage account.
Slow IOPS in Azure VM’s? not anymore!
Select the Run diagnostics check box if you want to run a diagnostic after the installation is completed. If you make this selection, you will be able to choose the performance analysis scenario and related options. The following analysis scenarios are available from the Azure portal. Select an analysis, depending on the performance issue that you are having.
Select the duration and trace options as necessary for the analysis. Quick performance analysis Checks for known issues, analyzes best practices, and collects diagnostics data. This analysis takes several minutes to run. Learn more Windows or Linux. Performance analysis Includes all checks in the quick performance analysis and monitors high resource consumption. Use this version to troubleshoot general performance issues, such as high CPU, memory, and disk usage.
We have sold our first 2 small Azure real world implementations and have set them all up and are now getting hit with extremely bad feedback from the clients over performance. It takes seconds to load websites in Internet Explorer even during testing today it took 10 seconds to load sites such as Telstra's site or Sydney Morning Heralds site.
It also takes on average 8 seconds to load Microsoft Excel without even loading a file. We initially advised the client they should be fine on an A2 plan, however after they first complained about speeds, we moved them to A3 which made next to no discernible difference and task manager is showing the machine not even coming close to using any resources. Our team here have run up an Amazon instance with smaller specs than the A3 plan and it is lightning fast doing the exact same things.
We have also benchmarked on another Virtual Machine host that we used to use as we still have clients there from before we decided to start selling Azure and they are also lightning fast doing the same things. Another one of our clients other clients has exactly the same slow performance on their RDS server, especially around browsing the Internet.
Speed tests on both show huge amount of speed i. It honestly feels like the Internet is operating at dial up speeds. We've purchased a developer support pack and tried to lodge support instances, however it keeps crashing at the end of creating the request saying "Cannot log a support request at this time. Please contact Microsoft via phone and lodge an Azure request".
We try calling via phone and they say they can't lodge them and we have to do it online. Our guys have spent about 20 hours on this issue and everything points back to the Azure VM's just being super slow compared to other cloud providers Amazon etc.
Azure disks are terribly slow. Waiting that, I would create a separate volume on top of storage spaces using as many disks as the VM size allows in order to get max iops.Beginners Guide to Creating a Virtual Machine in Azure
Moving the user profiles to that disk should help. The image above shows the specs between my personal developer workstation and our VM server in Azure. My i7 processor is 3 ghz versus the 2. My development workstation can restore a sql database backup in 1 minute 30 seconds.
In azure it takes 22 minutes and 4 seconds to restore the exact same backup file. I have contacted microsoft about this to see if they can offer any insight. The above test was conducted on the a2 v2 vm sized hardware and the a2m v2 sized vm hardware.
In both instances the database restored in 22 minutes. So far none of these VMS come anywhere close to the speed of my personal development workstation running sql server on a single ssd drive with basic windows 10 pro. I went with a D12 machine type see Virtual Machine sizes. It should offer decent IOPS. At least with the D-series there is the promise of "local" SSDs. Installing StyleCop took hours. Installing Resharper did not even complete.
It only takes a minute to sign up. I am using Ubuntu I can't login as root. This is also to discourage hackers or automated scripts that try to manipulate the root permissions. Quoting this article on Microsoft Docs:. By default, the root user is disabled on Linux virtual machines in Azure. Users can run commands with elevated privileges by using the sudo command.
However, the experience may vary depending on how the system was provisioned. SSH key and password OR password only - the virtual machine was provisioned with either a certificate. In this case sudo will prompt for the user's password before executing the command. SSH key only - the virtual machine was provisioned with a certificate. In this case sudo will not prompt for the user's password before executing the command. You can visit this page for more information:.
An alternative suggestion would be to use sudo -i which will run your user's shell with sudo privileges. Otherwise it may be wise to rely on the sudo timeout, which means you only have to enter your sudo password once within the defined time frame. Also worth noting is that sudo -v should extend the current timeout period by a further 15 minutes if you're already in a sudo session.
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Sudo su doesn't work on Microsoft Azure [closed] Ask Question. Asked 3 years, 7 months ago. Active 3 years, 7 months ago. Viewed 8k times. Melebius 9, 6 6 gold badges 37 37 silver badges 66 66 bronze badges. Printy Criess Printy Criess 21 1 1 silver badge 2 2 bronze badges. What is "microsoft azure Ubuntu File a support request.
I use microsoft azure. My machine is ubuntu What do you get when you run sudo su without the dash "-"? James Feb 16 '17 at This article describes virtual machine VM generic performance troubleshooting through monitoring and observing bottlenecks and provides possible remediation for issues that may occur.
To check whether you have the VM diagnostics enabled, see Azure Resource logs overview. If you see the following, then you most likely don't have the diagnostics enabled:. You can check the storage account used for Diagnostics setup from Agent tab under Diagnostics Settings. Storage is a very important tier when we intend to analyze IO performance for a Virtual Machine in Azure.
For storage related metrics we need to enable diagnostics as an additional step. This could also be enabled, if we only want to analyze the storage related counters. Identify which storage account or accounts your VM is using by selecting the VM. Click Settingsand then click Disks :.
In the portal, go to the storage account or accounts for the VM and work through the following steps:. Click on any of the metrics, which will show another blade with more options to configure and add metrics. Once we are through the initial setup process for needed metrics, and post enabling the diagnostics for VM and related Storage account, we can shift to analysis phase.
To identify if you have any resource bottlenecks, review your data. If your find that your machine has been running fine, but it has been reported that the performance has recently degraded, review a time range of data that encompasses performance metric data before the reported changed, during and after the issue.
When looking at performance issues, be aware of the trends and understand if they affect you. In the next sections, we'll use the Monitoring graphs from the portal to show trends. They can also be useful for cross referencing difference resource behaviors in the same time period.
To customize the graphs, click Azure Monitor data platform.
If you can identify the task, determine whether the task runs at the required performance level. If performance is acceptable, you may not need to increase resources. Spike up and Constant — Often indicates a new workload. If it's not a recognized workload, enable monitoring in the VM to find out what process or processes causes the behavior. Once the process is recognized, determine whether the increased consumption is being caused by inefficient code, or normal consumption.
If normal consumption, decide whether the process operates at the required performance level. Constant — Determine whether your VM has always run at this level, or if it has only been running at that level since the diagnostics have been enabled.
If so, identify the process or processes causing the issue, and consider adding more of that resource.We have about 20 virtual machines running Windows Server But the issue will resolve by itself after around minutes, and come back after a few hours or a day or two.
We're seeing this issue across VMs deployed from early this year to those deployed a few days ago. I recall seeing a similar issue on the forum a while back, but could no longer find it. Has anyone experienced similar issue? Bring up Task Manager before the issue reproduces so you have it running ahead of time. Depending on how easy it is to reproduce, you may also want to have Process Monitor running too, and then after the issue is in state, stop Process Monitor and save it to.
How to install GUI for Ubuntu Server 18.* on Azure
At that point you'd do an XPerf to dig a little deeper. Thanks for the reply. I encountered this issue much less frequently in June, but it happened three times since yesterday. I'm pretty certain it's a network issue, as Remote Desktop keeps freezing sometimes even showing the "Reconnecting" dialog. Rebooting the VM also doesn't solve the issue. I also didn't notice any activity or time that "trigger" this situation.
It seems just come and go randomly. Is there a way to monitor network connectivity latency at least if not bandwidth since PING is blocked both inbound and outbound. Edit: In the past few days, this issue seems to be appearing around 2pm UTC and disappearing a hours later. I contacted Windows Azure support and was informed that I need to open a support case for this. Maybe it's just me, but it seems a bit odd to pay to solve a Windows Azure issue.
Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. To be honest I'm not even sure what to try I guess my plan will be to create a new vhd drive, attach it, and see how it performs but I'm not real hopeful. Is this just common knowledge or is it possible I have something configured wrong? A Windows 10 VM bug maybe? Some further info. Some problems here, but besides the possible azure issue you lack a basic understanding of computer storage.
Windows Explorer is really slow in that it does things linearly. Split the copy job into multiple smaller jobs that run in parallel and you may see a speed up. The last one can be significant - Explorer etc. All the while nothing happens. Multiple parallel jobs may simply be - faster. Sign up to join this community. The best answers are voted up and rise to the top. Ask Question. Asked 5 years ago. Active 5 years ago.
Viewed 5k times. Any suggestions on what I can check or try next? EDIT Some further info. Refracted Paladin Refracted Paladin 7 7 silver badges 18 18 bronze badges. More useless info. Grab us the proper performance counters to measure latency and IO load. Sure, I'll research how to do that and post back here once I have figured it out.