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HP0-781 - NonStop Performance Analysis and Tuning - BrainDump Information

Vendor Name : HP
Exam Code : HP0-781
Exam Name : NonStop Performance Analysis and Tuning
Questions and Answers : 154 Q & A
Updated On : January 21, 2019
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HP0-781 exam Dumps Source : NonStop Performance Analysis and Tuning

Test Code : HP0-781
Test Name : NonStop Performance Analysis and Tuning
Vendor Name : HP
Q&A : 154 Real Questions

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HP HP NonStop Performance Analysis

HP at CES 2019: HP Spectre x360 15 gets AMOLED display | killexams.com Real Questions and Pass4sure dumps

HP plans to liberate a revamped version of its latest-technology Spectre x360 15 convertible desktop with a 15.6-inch AMOLED monitor this 12 months, the business has published ahead of CES. The inclusion of an OLED monitor makes this a very terrific occurrence, because the the computer might be the newest and biggest of a small handful of gadgets released over the past few years to get this type of reveal.

It goes with out announcing that the monitor is among the key hardware accessories in any laptop, and plays a significant part in picking the normal adventure with the device. by using an AMOLED panel in its place of a standard terrific IPS-primarily based one, HP's top-of-the-latitude Spectre x360 15 will be able to present very vibrant and correct colorations (covers a hundred% of the DCI-P3 color space), a really high distinction ratio (100,000:1), wide horizontal viewing angles, deep blacks, quickly response time (believe 0.1 ms) as well as every little thing decent that the AMOLED technology is everyday for. The catch, of path, is that OLED historically comes with some downsides as well (e.g., off-axis colour transferring, ghosting, burn-in, and so on.), but it is still to be considered how this could play out for the Spectre x360 15.

HP says that the display will support HDR, but does not specify even if it ability HDR10 or Dolby vision spec. The enterprise also is never disclosing the resolution of the reveal it plans to make use of, so it remains to be seen whether it has managed to acquire an ultra-HD (3840×2160) panel, needed to keep on with a QHD (2560×1440) one, or used whatever thing greater customized. The most effective aspect we do comprehend is that the computing device with an AMOLED video display has the equal bezels because the computer with an IPS lcd, which is logical as each monitors function the equal 15.6-inch diagonal dimension (see photographs of AMOLED and IPS types below).

featuring an ultra-thin chassis with golden accents and powered with the aid of Intel’s quad-core Whiske Lake-U processors in addition to NVIDIA’s discrete GeForce GTX GPUs, latest-gen HP’s Spectre x360 15 convertible laptops are already ranked among the properly-performing skinny-and-easy 15.6-inch notebooks. with the aid of including an AMOLED reveal to the classy enclosure with high-performance accessories, HP makes its flagship 15.6-inch computing device slightly more dazzling, however simplest a practical analysis of the product will demonstrate how good (or dangerous) HP's AMOLED screen in reality is.

HP plans to delivery promoting its AMOLED reveal-equipped Spectre x360 15 this March. The company says that it will divulge accurate specifications and prices nearer to the genuine launch, however is low in cost to expect that AMOLED-outfitted SKUs will come at a top class, and should likely be completely paired with different excessive-conclusion components (CPU, GPU, SSD, Wi-Fi) to match.

HP isn't the first enterprise to use an OLED-classification monitor with cellular PCs. Lenovo launched ThinkPad X1 Yoga with an OLED computer screen three years in the past and we reviewed one returned then. We did note off-axis color transferring and ghosting on that display and Lenovo has not provided OLED-primarily based cellular PCs on account that then. obviously, technologies always evolve, so it could be wonderful to look if and how HP's 15.6-inch AMOLED screen has stronger on matters when you consider that then.

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supply: HP


TIC On the circulation – adds HPE NonStop performance expert to crew | killexams.com Real Questions and Pass4sure dumps

(PRLEAP.COM) July 10, 2018 (amazing Neck, the big apple) – TIC utility, the main provider of application solutions and consulting functions for HPE NonStop modernization, is blissful to announce the addition of Matt Riesz to their employ as a client advisor. Mr. Riesz is a 35-yr veteran of Tandem/Compaq/HP/HPE and brings to bear great experience and knowledge within the field of efficiency analytics to assist TIC valued clientele. He'll work with TIC's NonStop shoppers, conserving their systems working at height effectivity and productiveness ranges.

Mr. Riesz's profession spans the gamut of corporate transitions within what is now referred to as HPE NonStop. employed by means of Tandem computer systems in 1982 as a systems engineer, his career evolved because the enterprise morphed from Tandem to Compaq, and eventually to HP/HPE, where he retired as a master systems architect. Matt's focus has been on pre-and publish-sales technical help for application and methods. His advantage in system architecture, analytics and efficiency can be leveraged to assist TIC customers understand optimum productiveness from their NonStop techniques.

Mr. Riesz may be offering operations assist for TIC shoppers via performance analysis, besides integrating new technologies into the firm's ongoing NonStop modernization efforts. Some of those new applied sciences encompass:

  • Amazon web functions (AWS) – presenting subscription-in keeping with-demand cloud computing
  • true NonStop GUI – giving NonStop users helpful access from a standard home windows interface
  • Blockchain technology – dispensed digital facts – shared & reconciled throughout the internet
  • "we're excited so as to add an experienced skilled of Matt's caliber to our group," explained Phil Ly, President, TIC software. "Matt's mammoth journey with NonStop consumers within the container, and his equipment analysis and architecture abilities and competencies, will aid our shoppers improve their IT operations via more desirable performance and productivity. We seem to be forward to providing Matt's competencies to all our NonStop modernization shoppers'!"

    About TIC application:TIC software changed into created to tackle the challenges of holding Tandem/HP NonStop legacy techniques current with ever-evolving "modernization" know-how – providing consulting skills and utility options designed to keep mission-critical purposes up-and-operating. these days, we proceed to satisfy these modernization challenges, in addition to offer migration options to organizations trying to explore other technological options. visit www.ticsoftware.com for more.

    TIC software – NonStop Innovation

    MEDIA CONTACT: Ryan Ly, TIC utility, C: 310-409-5082


  • HP EliteBook x360 1030 G3 overview: skinny, gentle, swish | killexams.com Real Questions and Pass4sure dumps

    The EliteBook sequence covers a wide range of items for HP, however they all have one factor in typical. they're designed for enterprise category gurus, a group of people who on a second's note can be in Seattle one day or Tokyo the subsequent. extra-so than ever, groups are have few borders, with purchasers and workplaces throughout the realm. This skill lots of shuttle for the up to date team of workers and also you do not need your road warriors touring with legacy know-how and short battery life. happily, the HP EliteBook x360 1030 line of convertibles comes with the latest in Intel mobile platform hardware and also enables businesses to configure the reminiscence, storage and reveal to top-rated fit their needs. Our recommendation could be to not skimp out on gadget memory, because it be soldered to the motherboard, although it is a common subject this present day with many ultralight machines. That stated, the rest of the EliteBook's hardware is as much as challenge for virtually any 2-in-1 person. even with reminiscence configurations, the EliteBook x360 can deal with graphic editing, spread sheets and mainstream games, when the boss is away. HP's 2-in-1 design with this laptop is also done well, making it a handy gizmo for any company user who needs more flexibility and portability than a typical desktop can offer.  in terms of efficiency, the EliteBook x360 1030 supplies as neatly. For customary company type projects, this machine is up to to the problem. In our testing, it changed into one appropriate within the combine with an identical class 2-in-1 contraptions we now have proven. The machine's a dual fan cooling gadget that does a decent job fighting the processor from throttling, though admittedly the desktop in no way hit our very properly echelon of verify rankings both. we will go on and on about efficiency, but the sincere actuality is any Intel Kaby Lake R processor with 16GB of memory will yield identical consequences. at the present time, most laptops deserve to locate a way to face out in other ways, and in this case it become battery lifestyles and construct high-quality. When trying out the EliteBook x360 beneath precise-world usage, it had an up time of nearly eight hours. it truly is sufficient time to fly from Seattle to Miami and nevertheless have spare up-time for the meeting without plugging in. 

    We truly enjoyed our time with the EliteBook x360, however there were just a few considerations we discovered. the first turned into the undeniable fact that its lid can also be difficult to open. When protecting the computer for your lap or not it's tough to get a superb grip on the lid, making it a bit awkward. The other element we seen changed into that after in pill mode, the computing device's keys didn't retract into the chassis. This skill you are going to consider the keys even when keeping it like a pill. The keys are disabled, but it's just not as comfortable to dangle it in pill mode with the important thing caps leaving an uneven floor.

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    NonStop Performance Analysis and Tuning

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    SRE: Performance Analysis: Tuning Methodology Using a Simple HTTP Webserver In Go | killexams.com real questions and Pass4sure dumps

    dm03514BlockedUnblockFollowFollowing

    Nov 19, 2018

    Performance analysis and tuning is a powerful technique to verify if client focused performance requirements are being met. Performance analysis can be used to characterize where a program is spending its time and supports a scientific approach to testing the efficacy of tuning experiments. This post defines a general approach for performance analysis and tuning using a go HTTP service as an example. Go is particularly well suited for performance analysis and tuning because it provides pprof profiling tool chain in its standard library.

    Strategy

    Let’s try to establish a loose framework to begin a structured analysis of our program. The only thing we will try and do will be to use data to guide our decisions instead of making changes based on intuition or hunches. In order to do this we will:

  • Establish which dimensions we’re optimizing for (Requirements)
  • Create a harness to apply transactional load to the system
  • Execute a Test— (Generate data)
  • Observe
  • Analyze — Are the requirements met?
  • Tune — Scientific Method — Form A Hypothesis
  • Execute experiment to test this hypothesis
  • Simple HTTP Server Architecture

    For this blog post we’ll be using a small HTTP golang server. All code for this post can be found at: https://github.com/dm03514/sre-tutorials/tree/master/performance/analysis-methodology-simple-http

    The application that will be analyzed is a go HTTP server that queries PostgreSQL on each request. Additionally, there is Prometheus, node_exporter, and Grafana in order to collect and visualize application and system level metrics:

    For simplicity this post assumes that in order to scale horizontally (and simplify our calculations) each HTTP service and Postgres Database will be deployed together:

    Determine Goals (Dimensions)

    This step outlines a specific goal. What are we trying to analyze? How do we know when our efforts are complete?

    For this post we’ll pretend that we have clients and that on average our service will be called 10000 requests / second.

    The Google SRE Book goes into a lot of depth on how to choose and model these. In the spirit of SRE we’ll model ours as:

  • Latency — 99% of requests should complete in < 60ms
  • Cost— The service should use the minimal amount of money that we think is reasonably possible. In order to do this throughput should be maximized.
  • Capacity Planning — An understanding of how many instances will be required for launch and the general scaling function should be documented. What’s the number of instances we’ll need to meet our expected initial load requirements and achieve n+1 redundancy?
  • Latency may be require an optimization in addition to analysis but throughput is an analysis. Using SRE SLO process the latency requirement would come from the client and or business as represented by the product owner. What’s really cool about this is that our service may be able to meet this commitment from the outset without any required tuning!

    Setup Test Harness

    The test harness will apply a fixed amount load to our system. In order to analyze the performance of the HTTP service data will have to be generated.

    Transactional Load

    This harness just uses Vegeta to make HTTP requests at a configurable rate until stopped:

    $ make load-test LOAD_TEST_RATE=50echo "POST http://localhost:8080" | vegeta attack -body tests/fixtures/age_no_match.json -rate=50 -duration=0 | tee results.bin | vegeta report Observe

    During execution an unending transaction load will be applied (load test). In addition to application (requests rate, request latencies) and system level metrics (memory, CPU, IOPS) this time the application will be profiled in order to understand where it is spending its time.

    Profiling

    Profiling is a type of measurement and allow us to to see where the program is spending its time. It reports where a program is spending its time. Profiling can be used to identify which functions are being called and how much time the program is spending in each one:

    This data can be used during analysis to gain visibility into unnecessary work that the program is doing. Go (pprof) is able to generate profiles, and visualize them as a flame graph, using the standard toolchain. We’ll cover using these to guide tuning decisions later in this post.

    Execute/Observe/Analyze

    Let’s begin executing experiments. We’ll execute, observe and analyze until we our performance requirements have been invalidated. We’ll choose an arbitrary low amount of load to apply in order to generate the first observations and analysis. Each step that our performance requirements hold true we’ll increase the load by some random-ish scaling factor. Each of the load tests are executed by adjustng the rate of:make load-test LOAD_TEST_RATE=X.

    50 requests / second

    Notice the top two graphs. The upper left hand shows us that our application is registering that it is processing 50 requests per second (from its point of view) and the upper right reporting the duration of each HTTP request. These together help us observe and analyze if our performance requirements are being met. The red line on the HTTP Request Latency is at the SLO of 60 ms. This shows that we are well below it for our max response times.

    On the cost front:

    10k requests / second / 50 requests / machine = 200 machines + 1

    we can still do much better.

    500 Requests / second

    Things start to get more interesting when 500 requests per second are applied:

    Once again the upper left hand graph shows that the application is registering the intended load. If it weren’t it might identify an issue in the host machine between the load test command and the application server. The latency graph in the upper right graph shows that applying 500 requests / second send the tail up to 25–40ms per HTTP requests. The p99 is still well within the 60ms SLO that was specified above.

    On the cost front:

    10k requests / second / 500 requests / machine = 20 machines + 1

    we can still do much better!

    1000 requests / second

    This is a great one! The program is logging 1000 requests / second, but on the latency side the SLO has been violated. This can be seen by the P99 line in the upper left hand graph. While the tail p100 max is much higher p99 tracks above the 60ms maximum. It’s time to dive in and profile what the application is actually doing.

    Profile

    In order to profile we’ll apply 1000 request per second load and then use pprof to sample the stacks in order to get an idea of where our program is spending its time. This is done by enabling the pprof HTTP endpoint and curling a trace while load is being applied:

    $ curl http://localhost:8080/debug/pprof/profile?seconds=29 > cpu.1000_reqs_sec_no_optimizations.prof

    The trace can then be visualized using:

    $ go tool pprof -http=:12345 cpu.1000_reqs_sec_no_optimizations.prof

    The flame graph shows where the application is spending its time and how much time time is being spent! From Brendan Gregg’s description:

    The x-axis shows the stack profile population, sorted alphabetically (it is not the passage of time), and the y-axis shows stack depth, counting from zero at the [top]. Each rectangle represents a stack frame. The wider a frame is is, the more often it was present in the stacks. The top edge shows what is on-CPU, and beneath it is its [children]. The colors are usually not significant, picked randomly to differentiate frames.

    Analysis — Hypothesis

    In order to guide tuning we’ll focus on trying to find unnecessary work. We’ll try and find the largest source of unnecessary work and remove it. Since profiling exposes where exactly the service is spending its time it requires identifying potentially duplicate work, modifying the code to change it, re running the test and observing if the performance is closer to its goal.

    Following Bredan Gregg’s description the go pprof flame graph is read from top to bottom. Each row represents a stack frame (function call). The first row is the entry point to the program and is the parent of all other calls (ie all other calls have the first line in their stack). The next row diverges from this:

    Hovering over the function name in the flame graph shows the total amount of time it was on the stack during tracing. HTTPServe was on the stack for 65% of the profiles while various go runtime methods runtime.mcall , mstart, gc compose the rest of this. One interesting thing is that 5% of the program is being spent in DNS Lookups:

    The only addresses that the program should be resolving are for Postgres. Clicking on FindByAge shows:

    This is interesting it shows roughly 3 main sources which add to the latency: Closing/Releasing Connections, Querying Data, and Connecting.Based on this flame graph DNS lookups and connection closing/opening amounts for ~13% of the total service time.

    Hypothesis: Reusing connections through pooling will reduce HTTP transaction time allow for higher throughput and lower latency.

    Tune the application — Experiment

    The program will be updated to try and remove the postgres connection on every request. One way to do this is to use an application level connection pool. This experiment will configure a connection pool using the go sql driver pool configuration options:

    db, err := sql.Open("postgres", dbConnectionString)db.SetMaxOpenConns(8)

    if err != nil {return nil, err}

    Execute/Observe/Analyze

    Re-Runing the 1000 test load test shows that the P99 HTTP Request Latency is well within the 60ms SLO!

    But on the cost front:

    10k requests / second / 1000 requests / machine = 10 machines + 1

    Let’s try and do better!

    2000 Requests / Second

    Doubling the requests show the same. Once again the upper left hand graph shows that the application is receiving 2000 requests per second, and that while the p100 max client latency is above 60ms, the p99 is still within the SLO.

    On the cost side:

    10k requests / second / 2000 requests / machine = 5 machines + 1

    3000 Requests / second

    At this point the service is able to achieve a rate of 3000 requests / second with < 60ms p99 latency, with the p100 rising significantly from 100–250ms to 250ms-1000ms between this run and the 2000 requests / second run. While the SLO isn’t being violated and costs are acceptable with:

    10k requests / second / 3000 requests / machine = 4 machines + 1

    Let’s try one more round of analysis.

    Analysis — Hypothesis

    Generating and visualizing a profile of the application with 3000 requests / second load being applied shows:

    There is still 6% of the FindByAge transaction length due to Dialing Connections!! Establishing a connection pool has increased performance but its still observed that the program is still doing repeated work by continuing to make new DB connections!

    Hypothesis: Even though connections are being pooled they are still being recycled and cleaned up resulting in the application having to reconnect. Adjusting the number of connections idle to equal the pool size should help with latency by further minimizing the amount of time the application spends in creating database connections.

    Tune the application — Experiment

    Let’s try and set the MaxIdleConns equal to the pool size (also described here):

    db, err := sql.Open("postgres", dbConnectionString)db.SetMaxOpenConns(8)db.SetMaxIdleConns(8) if err != nil {return nil, err} Execute/Observe/Analyze

    3000 requests / second

    p99 is well below the <60ms! @ 3000 requests per second with a lower p100!

    Looking closely at the flame graph below now shows that the connection dial has no longer shows up! Looking closely at pg(*conn).query a whole leg of dialing is no longer there.

    Conclusion

    Performance analysis is critical for understanding if client expectations and non-functional requirements are being met. Analyzing performance by qualifying observations against client expectations can help in determining what is acceptable performance vs what is unacceptable. Go provides amazing utilities baked into the standard library to make this sort of analysis easy and accessible.

    I appreciate you reading this and would love feedback!


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    SolarWinds Database Performance Analyzer 12.0 introduces query performance analyzer, table tuning advisor for workload optimization | killexams.com real questions and Pass4sure dumps

    SolarWinds, provider of IT management software, announced this week availability of SolarWinds Database Performance Analyzer (DPA) 12.0, a database and query performance monitoring, analysis, and tuning tool built for existing databases. These enhancements are designed to help database professionals identify and pinpoint the root cause of slow database queries, and optimize database tables to help ensure the speed of business-critical applications that rely on them.

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    The Table Tuning Advisor is designed to proactively provide a solution to one of the most challenging aspects of database management: indexing. SolarWinds DPA Table Tuning Advisor helps identify and validate index opportunities by monitoring workload usage patterns, and then making recommendations to users of where a new index can help optimize inefficiencies.

    “Table Tuning Advisor answers about 99 percent of what I want to know,” said Dale Fanning, director, database & systems engineering, Regent University. “I think it provides all the data you would need to make a tuning decision.”

    “Databases are at the crux of application performance and a slow database often results in a slow application,” said Christoph Pfister, executive vice president of products, SolarWinds. “Solving application performance issues without deep insight into the database is a challenging endeavor at best. SolarWinds DPA 12.0 can help database professionals tackle performance problems more quickly and accurately with these new features, which are designed to identify exactly where to focus tuning and indexing efforts to optimize the performance of their environments and reduce manual processes.”

    SolarWinds Database Performance Analyzer can be deployed to on-premise and hosted Windows or Linux servers, or easily provisioned to Microsoft Azure from the Microsoft Azure Marketplace. Pricing for SolarWinds Database Performance Analyzer for Azure SQL Databases in the Microsoft Azure Marketplace starts at US$695 per database license (perpetual, BYOL). A fully functional two-week trial is available.

    Customers will not incur SolarWinds software charges during free two-week cloud trials; however, infrastructure charges may still apply. Pricing for other versions of SolarWinds Database Performance Analyzer starts at $1,995 per database instance, and pricing includes the first year of maintenance (licenses are perpetual with a related maintenance fee).



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