Maybe the release caused a performance problem, maybe you had a customer with slow internet speed, or maybe there was an accidental upload of development environment scripts. When you are diagnosing a performance problem, you can use the metrics surfaced in Real User Monitoring to help you make better decisions about where to prioritize performance optimizations.
For example, the histogram helps you to spot outliers by helping you understand the load time distribution. These visualizations help you understand how many people are experiencing the problem and what the cause is. The prioritizing can be based on the time the fix would take, the value it has in the application, or how quickly you can deliver the fix to the end-user.
The next topic is the highlight of this post: how you can improve the performance of the website. Below are the most common website performance optimizations.
Minification is the process where you remove all the unnecessary parts of the code, such as blank spaces, new lines, and comments. You can also replace lengthy variable names with shorter ones. Shortening the length of code improves performance. You can use a minifying tool or write a script to automate this process.
Minification is also easy to implement and reduces load time for each asset. Profiling is difficult and sometimes expensive to do. It's essentially impossible to do in production. But worse than that, if your entire approach to performance management is based on profiling, you won't find out about these problems until it's too late.
Good load tests don't just measure stuff, they establish a baseline so it's easy to see sudden or even gradual changes. When you see a sudden change in the output of your load tests, you know it's due to a change you made since the last test run. Load testing may not help you much after you discover a problem in production.
But once you've got performance up to acceptable levels, you really should consider investing in a load testing solution so that you can get fast feedback on performance issues, preferably before you're entrenched in a particular architecture or product and can't easily back out. I mean I wouldn't have a nice report saying "this part is slow" Here's how I find them.
Slowness will not always be localized to any "this part", and if it isn't, that doesn't mean you can ignore it. I've written a lot on this , and there's a more scientific explanation here. In a nutshell, you can get more stack samples on wall-clock time, for example from a profiler if it's a good one. The result of having a large number of samples is you are not allowed to see the rich information in any of them, but only summary measurements, and those are too vague to tell you what you could fix.
If you look at 10 or 20 samples, it will appear on about 2 to 4 of them, or more, and you will see it. However, if there are samples, of them, or more, will be doing that activity, but since all you get to see are time measurements of routines, you won't see the problem. StackOverflow is full of questions of the form "what does this profiler output mean? When in fact, there is a way, that you would see if you examined a small number of the samples in detail.
Performance tuning should be guided by observing which resource is actually critical for the execution time or for the throughput. In a multi-user multi-processing system, this is difficult to assess with a general purpose profiler and largely depends on the type of application. Use tools like top , ntop , iostat or vmstat to get an overview on Unix systems. Excessive page file traffic indicates too high memory consumption.
Databases like Oracle usually have a tool to find SQL statements which cause most of the database load. Make sure that the system under test is free of any interfering external influences malware scanners for example.
Repeat the tests to make your results reliable. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How to find bottlenecks in an application? Asked 8 years, 3 months ago. Active 8 years, 3 months ago. Viewed 19k times. Improve this question. Figure 4. Win8's Resource Monitor still has an old-school look, but it lets you drill deeply into system-performance information.
Either click the link at the bottom of the Performance tab in Task Manager, or click Start and enter resmon into the search box. Click resmon when it appears. You might be prompted for admin permission. Figure 5. Like its Win8 counterpart, Win7's Resource Monitor provides a detailed look at what's going on inside Windows.
To access it, click Start, right-click Computer, and then click Manage. Again, you might be asked for admin permission. When the Computer Management console opens, click Reliability and Performance in the left pane see Figure 6. Figure 6. Vista's Reliability and Performance monitor is found within the Computer Management console. While you work, keep an eye on the performance graphs; you want to become familiar with how your PC responds to varying workloads.
For example, note drive, CPU, and networking activity as you open applications, copy large and small files from one place to another, and download videos from the Web. At times, some or all of your hardware subsystems will have relatively short bursts of maximum usage.
Some tasks will give one subsystem a long and heavy workout. Such easily explained, high levels of sustained activity are generally not signs of a severe system bottleneck. When your PC suddenly slows for no apparent reason, take a look at your performance graphs. Obviously, it makes no sense to have a super-fast CPU and a slow hard drive or to try running memory-intensive applications such as virtual machines or video editing with just 2GB of RAM.
If one subsystem is a frequent bottleneck for your computing work, you can improve performance by servicing, upgrading, or replacing that subsystem. Here are some ideas. Disk bottlenecks : If performance monitoring indicates that a hard drive is causing frequent slowdowns, first try to correct the problem with a full round of disk maintenance and diagnostics.
For how-to information, see the Jan. If your hard drive is FAT-formatted e. The Windows built-in convert. Obscure drive alignment problems can also rob performance, especially on traditional, spinning-platter drives. For a discussion of drive alignment and some suggested tools free and paid , see the Oct. CPUs and mainboards are often tested as a unit.
That might be possible, depending on the type of components and age of your system. If your RAM is healthy, and you routinely come close to using all available memory, your best option is to add more RAM. Check your system documentation for the type and speed of memory chip the machine can use.
If all memory slots are filled, you might have to replace your current memory modules with higher-capacity versions. If your system already has all the RAM it can support, your only real option is a new mainboard or — far more simply — a new system.
Network bottlenecks : Networking problems can affect transfer speeds with network-attached storage devices and your ability to work online, but they rarely cause a general PC slowdown. Most networking issues are outside the PC — problems with cables, modems, and routers; Wi-Fi saturation; and so on. Select Troubleshoot problems and then let the automated repair tools do their thing. Next, test your PC networking hardware with whatever tools the manufacturer offers.
Table of contents. Staying true to current form, Microsoft had to recall one of its patches almost immediately — but not soon enough for some Windows users. A Visual Studio update is further proof that enabling automatic updates in Windows Update can be hazardous. Soon after KB was released, there were widespread reports — including posts in the Windows Secrets Lounge — that it was causing system hangs during installation.
To regain access to their machines, the affected users had to do a hard reboot or manually stop the Windows Update service. What to do: If you have Windows Update set to automatic, I hope you were able to regain control of your computer quickly. The update is rated critical for all supported Windows workstations. This round of IE updates is a bit more complicated than usual for those who manually download and install patches. On Windows 8. Install KB MS when offered. Add any of the related patches noted above if they show up in Windows Update.
The two patches in MS fix six vulnerabilities in the Windows kernel. Rated critical , KB patches a vulnerability that could allow remote attacks on Windows systems. The patch fixes the way the kernel validates or error-checks objects such as TrueType fonts.
A related patch, KB , fixes a Windows security feature and is rated important. Microsoft is researching the issue and will reportedly follow up when — or if — it finds a solution. Microsoft might reissue the former. A bunch of security updates for Office address just three privately reported vulnerabilities. Opening a malicious Office file could give a remote hacker the same rights as the user. All of the following updates are rated important. Nevertheless, you might see updates for both Office and ; install them both, if offered.
What to do: Install any of the above Office updates offered see MS for more info. But the flaw could be used with other exploits to do some serious damage.
Attackers love to find novel ways to wiggle into systems. The update changes the way Windows validates impersonation events. Image files have always been a popular avenue of attack. The patch is rated important and applies to all current versions of Windows. This vulnerability will not let an attacker execute malicious software or gain more rights. But it could be used to obtain information that might help further compromise a system via blended attacks.
Two updates are primarily for systems connected to domains — typically business machines on large networks. In fact, only PCs connected to domains or active directory networks should see critical update KB All supported Windows systems should receive KB , rated important. KB patches a Windows vulnerability that could allow remote attacks if a hacker tricks a user into connecting to a malicious network. For admins, the patch should require testing and manually setting SMB policies.
I recommend reviewing a Feb. The last February security update applies only to machines using Virtual Machine Manager. If you do, look for KB , which fixes a flaw that could give an attacker elevated rights. Keeping track of your work in the form of task cards on a Kanban board makes it very easy to see where work items pile up, which is a strong sign of a problem, most likely a bottleneck.
Map Queues and Activities. When we separate queues and activities and map them on the Kanban board, we can see how much time our work sits waiting in a queue prior to a certain activity. If this queue grows significantly faster than the activity stage processes work, you have found your bottleneck. Measure Cycle Time per Stage. Measuring cycle time at every stage lets you build a cycle time heat map diagram.
Just a glance at this diagram reveals the stages where cards spend the most time. If these workflow stages are queues, too, those are probably your bottlenecks. What to do next? How to deal with a bottleneck? Leaving a bottleneck untreated will always cost you more than resolving it. What should you do next then? Here are several things you should do to contain the bottleneck: Never leave it idle.
Because of the ripple effect on the rest of the flow, the bottleneck process should always be loaded at full capacity. Reduce the strain on the bottleneck. Make sure that work arrives at it in its very best form. If your review process is a bottleneck, ensure that the quality is built in from the start. The work to be reviewed has to be flawless. Each error that the reviewer finds is going to cost you more time and money.
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