At work I was debugging a performance issue in one of our Elixir applications and stumbled across the strange implementation of Elixir’s System.get_env/0 function. In this blog post I’ll show how it caused performance issues for the application I was debugging and I’ll also propose a better implementation of the fun...
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Debugging MySQL replication lag by diving into the internals possible causes of replication lag, such as...Debugging MySQL replication lag by diving into the internals possible causes of replication lag, such as single-threaded replication, choice of binlog format, and disk flushing policy. I’ll show you how to diagnose the problem in your MySQL setup. Finally, I’ll describe how we fixed the replication lag in our case.