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Why and how you should monitor scheduled tasks

Original – by Freek Van der Herten – 10 minute read

Oh Dear is the monitoring SaaS that my buddy Mattias and I are running. As you might suspect, our service can monitor the uptime of sites and SSL certificates' health. What sets Oh Dear apart from the competition is that it can also monitor performance and detect broken links and mixed content on any of the pages of your site.

Today, we added a new type of monitoring: scheduled tasks monitoring. Oh Dear can now notify you whenever one of your scheduled tasks has not run or is running too late.

You can get started monitoring your schedule today. We have a free ten-day trial. And when using this coupon code, you'll get 30% off on the first three months when subscribing: MONITOR-ALL-THE-THINGS.

In this blog post, I'd like to introduce how you can use scheduled task monitoring in Oh Dear, and how it works under the hood. There were a lot of interesting challenges we had to solve. I hope you're ready to dig it.

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How to delete 900 million records in MySQL without shooting yourself in the foot

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When reviewing the contents of the database of Flare, we encountered a table with 1 billion records. Technically that isn't a problem. Flare runs on Vapor and uses an Aurora database, so it can handle that scale. But of course, there's a cost for storing that many records.

We dove in and concluded that we could safely delete about 900 million records. They all were created before a specific date.


How to call an overridden trait function

Original – by Freek Van der Herten – 3 minute read

Traits are a wonderful thing in PHP. You can use them to reduce code duplication by putting common functions in a trait and apply them to all classes where those functions are needed. I also sometimes use traits to break up a large function in multiple single-use traits.

In this post, I'd like to show you how you can override a trait function and call it from the overriding function.

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Making Time Make Sense in JavaScript

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Maggie Johnson-Pint discusses where the JavaScript Date goes bad, better ways to model the date and time space in our code, and how the Temporal proposal making its way through TC39 helps us write correct code for every person in every time zone.

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