well just copy it below :
^
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Category: General
Latency is the delay between a user’s action and a web application’s response to that action, often referred to in networking terms as the total round trip time it takes for a data packet to travel.
How to reduce latency
Content Delivery Network (CDN) providers provide customers with private networks that allow them to bypass the public internet. Therefore, these private networks reduce latency by providing more efficient paths for data packets to travel on.
Also the caching techniques is resolving the latency issue
How Latency Works
Consider that you are buying a product through an online shop and you press the “Add to Cart” button for a product that you like.
The chain of events that occur when you press that button are as follow :
- Firstly, You press the “Add to Cart” button.
- Secondly, The browser identifies this as an event and initiates a request to the website’s servers. The clock for latency starts now.
- Thirdly, The request travels to the site’s server with all the relevant information.
- Then, The site’s server acknowledges the request. The first half of the latency is complete.
- The server accept the request status.
- The site’s server replies to the request with relevant information.
- The request reaches your browser and in the card the system adds the product. With this, the latency cycle is completed.
The latency is the time that it takes for all these events to complete.
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How to find the RAM memory ?
Many times you have to figure out the RAM memory on a server or your laptop let’s say. it works with a Macbook. The easiest way is to open a terminal and execute the following command
free -h
Categories
How to find the microprocessor speed ?
Here is the command to find the microprocessor speed in unix machine. MacOs is a unix machine so you can run the following command :
lscpu
Today’s challenge : investigate the slow responsiveness of the api. I was assigned the task to investigate the performance report produced the day before. The report concluded in the most unclear manner that the backend was lacking in term of performance. No precision regarding the list of failing api calls was provided. I used newRelic and discovered that indeed during the specific timeframe mentioned a clear bottleneck was surfacing an a specific api call to a specific internal server.
I reached out to the developer mainly responsible of this server. The newRelic information [pointing out the entanglement] was challenged in the most defensive and almost aggressive manner to my stupefaction.
Developer do not like to be pointed out or criticized. What/How should have approach this developer ?=
The developer challenged the results by saying “I just executed the specified api endpoint with the specified payload and guess what; the result came back under one second”. Omitting the context of Heavy Test Performance. So being pushed back multiple time, I moved on to the sysOp department to get more information on what was going on.
The slow server obviously was not monitored with newRelic. A coordination with sysOp was necessary to get this server under surveillance. During our meeting, it was established that the server was under provisioned in term of CPU power and memory space. We did increase these metrics.
The tests were ran and passed successfully. The main challenges were to get the approval from the CIO to have sysOp moving and the developer’s resistance to acknowledge a possible glitch on the server.
My approach toward this developer although very specific and data documented should have been persuasive rather than convincing.
valet use [email protected]
If you are experiencing the issue below , you can try here
https://cards-dev.twitter.com/validator
Enabling AES128 as an ssl cipher will allow the Twitterbot to connect.
See different forums confirming the solutions
If you are using cloudfare, please see configuration
See more information about cloudfare
https://developers.cloudflare.com/ssl/ssl-tls/cipher-suites
then it will work
I found 3 solutions to this problem
Solution one
-> go to phpStorm->preferences
then select PHP and add your workingspace path into the include path
Solution 2
Got to file->invalidate Caches and choose the option that fits you need
Solution 3 (optional)
Do not forget to get latest file from you git or FTP repository
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What Is Continuous Integration?
I implemented at 4over continuous integration during the year 2019 with David Reynolds. A Developer Manifesto was also produced to guide developers and QA team while producing and testing the codebase.
Continuous deployment advances continuous delivery further at which codes are integrated, deployed to production, automatically tested, and reverted when errors happen. To be specific, every change that passes all production pipelines is deployed directly to production without additional intervention. Therefore, the software release process is faster and more robust through rigorous automated testing without explicit approval from developers.
source : https://dzone.com/articles/top-devops-interview-questions?edition=682391
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