Code  Camp

Code Camp

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How to Build a Career in Tech: Jordan Jackson Connects the Dots

Jason Lengstorf interviews Jordan Jackson.

Jordan Jackson started learning to code using freeCodeCamp.org while he was in the United States Air Force. Now he is a software engineer at Twitter.

Jason Lengstorf works at Netlify and hosts Learn With Jason. He is trying his very best to follow his own advice. Follow him on Twitter here: https://twitter.com/jlengstorf

#interview-questions #developer #programming

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How to Build a Career in Tech: Jordan Jackson Connects the Dots

PostgreSQL Connection Pooling: Part 4 – PgBouncer vs. Pgpool-II

In our previous posts in this series, we spoke at length about using PgBouncer  and Pgpool-II , the connection pool architecture and pros and cons of leveraging one for your PostgreSQL deployment. In our final post, we will put them head-to-head in a detailed feature comparison and compare the results of PgBouncer vs. Pgpool-II performance for your PostgreSQL hosting !

The bottom line – Pgpool-II is a great tool if you need load-balancing and high availability. Connection pooling is almost a bonus you get alongside. PgBouncer does only one thing, but does it really well. If the objective is to limit the number of connections and reduce resource consumption, PgBouncer wins hands down.

It is also perfectly fine to use both PgBouncer and Pgpool-II in a chain – you can have a PgBouncer to provide connection pooling, which talks to a Pgpool-II instance that provides high availability and load balancing. This gives you the best of both worlds!

Using PgBouncer with Pgpool-II - Connection Pooling Diagram

PostgreSQL Connection Pooling: Part 4 – PgBouncer vs. Pgpool-II

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Performance Testing

While PgBouncer may seem to be the better option in theory, theory can often be misleading. So, we pitted the two connection poolers head-to-head, using the standard pgbench tool, to see which one provides better transactions per second throughput through a benchmark test. For good measure, we ran the same tests without a connection pooler too.

Testing Conditions

All of the PostgreSQL benchmark tests were run under the following conditions:

  1. Initialized pgbench using a scale factor of 100.
  2. Disabled auto-vacuuming on the PostgreSQL instance to prevent interference.
  3. No other workload was working at the time.
  4. Used the default pgbench script to run the tests.
  5. Used default settings for both PgBouncer and Pgpool-II, except max_children*. All PostgreSQL limits were also set to their defaults.
  6. All tests ran as a single thread, on a single-CPU, 2-core machine, for a duration of 5 minutes.
  7. Forced pgbench to create a new connection for each transaction using the -C option. This emulates modern web application workloads and is the whole reason to use a pooler!

We ran each iteration for 5 minutes to ensure any noise averaged out. Here is how the middleware was installed:

  • For PgBouncer, we installed it on the same box as the PostgreSQL server(s). This is the configuration we use in our managed PostgreSQL clusters. Since PgBouncer is a very light-weight process, installing it on the box has no impact on overall performance.
  • For Pgpool-II, we tested both when the Pgpool-II instance was installed on the same machine as PostgreSQL (on box column), and when it was installed on a different machine (off box column). As expected, the performance is much better when Pgpool-II is off the box as it doesn’t have to compete with the PostgreSQL server for resources.

Throughput Benchmark

Here are the transactions per second (TPS) results for each scenario across a range of number of clients:

#database #developer #performance #postgresql #connection control #connection pooler #connection pooler performance #connection queue #high availability #load balancing #number of connections #performance testing #pgbench #pgbouncer #pgbouncer and pgpool-ii #pgbouncer vs pgpool #pgpool-ii #pooling modes #postgresql connection pooling #postgresql limits #resource consumption #throughput benchmark #transactions per second #without pooling

Enos  Prosacco

Enos Prosacco

1598775579

The 4 Myths You Hear About Advancing Your Career in Tech

I’ve heard a bewildering number of career advice claims since I started working in tech. There is always some secret knowledge which you can use to take your career to the next level. It’s not enough to be a coding ninja rockstar or whatever buzzword bingo you see in a job ad, you have to focus on the “metagame” of your career. All of this advice started out with the best of intentions, but…

#tech #programming #careers #work #career-advice #machine learning

Code  Camp

Code Camp

1608343650

How to Build a Career in Tech: Jordan Jackson Connects the Dots

Jason Lengstorf interviews Jordan Jackson.

Jordan Jackson started learning to code using freeCodeCamp.org while he was in the United States Air Force. Now he is a software engineer at Twitter.

Jason Lengstorf works at Netlify and hosts Learn With Jason. He is trying his very best to follow his own advice. Follow him on Twitter here: https://twitter.com/jlengstorf

#interview-questions #developer #programming

The Best Way to Build a Chatbot in 2021

A useful tool several businesses implement for answering questions that potential customers may have is a chatbot. Many programming languages give web designers several ways on how to make a chatbot for their websites. They are capable of answering basic questions for visitors and offer innovation for businesses.

With the help of programming languages, it is possible to create a chatbot from the ground up to satisfy someone’s needs.

Plan Out the Chatbot’s Purpose

Before building a chatbot, it is ideal for web designers to determine how it will function on a website. Several chatbot duties center around fulfilling customers’ needs and questions or compiling and optimizing data via transactions.

Some benefits of implementing chatbots include:

  • Generating leads for marketing products and services
  • Improve work capacity when employees cannot answer questions or during non-business hours
  • Reducing errors while providing accurate information to customers or visitors
  • Meeting customer demands through instant communication
  • Alerting customers about their online transactions

Some programmers may choose to design a chatbox to function through predefined answers based on the questions customers may input or function by adapting and learning via human input.

#chatbots #latest news #the best way to build a chatbot in 2021 #build #build a chatbot #best way to build a chatbot

Obie  Rowe

Obie Rowe

1598698380

How To Start An IT Career From Scratch

This story is for the people who doesn’t have any experience in IT industry, whether you are completely new to job market or have some experience in other fields yet want to start over a new career.

Sometimes you just feel lost when starting out a career. That happens to most people too. These steps will help you to get a glimpse of what to do when you are starting to look for an entirely new position in the IT industry.

Make a list for the positions you think is interesting

Before anything, you need to be prepared for the journey you are going to take. And first thing first, you have to pick a career that may interest you.

  • Software developer
  • Front-end or Back-end engineer
  • Business analyst
  • System analyst
  • Project manager
  • Network engineer

The purpose of this step is to get to know you. Let’s assume that you never have any experience related to information technology industry; then you may not know what these positions are, or maybe never even heard of it, and you need to take a look a little bit a what do they do before jumping into one career. You never know that maybe you are a talented guy for the position you never heard of!

Set goals

We all know that goal setting is important, yet sometimes we overlook this important process. Knowing what you want will escalate your learning progress and it will be more satisfying if you know that you are getting closer to the goal.

#coding #learning-to-code #technology-newbiew #career-advice #career-change #tech-career #online-courses #goal-setting