WirePlumber high CPU usage fix

WirePlumber high CPU usage fix

I have Fedora 36 installed on my laptop. Recently I’ve been using it a lot with a Bluetooth headset and noticed that sometimes WirePlumber creates high CPU usage. Turns out it was happening when the system was switching the Bluetooth profile for the headset from HSP to A2DP and backwards. There is a fix for that issue, but it is not yet available in Fedora’s repos. If you’re having the same issue, here’s how to fix it.

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reduce Java docker image size

How to reduce Java docker image size

If you’ve been using Java for a while, you might have noticed that starting with Java 11, Java Runtime Environment (JRE) doesn’t have a separate distribution anymore, it is only distributed as a part of Java Development Kit (JDK). As a result of this change, many official Docker images don’t offer a JRE-only image, e.g.: official openjdk images, Amazon corretto images. In my case using such an image was resulting in an app image of 414MB, where the app itself was only taking around 60MB. What a waste of space!

But fear not, as I’m going to show you how to reduce Java docker image size dramatically.

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Using Liquibase with Kubernetes

Using Liquibase with Kubernetes

If you’re using Liquibase for database versioning with Kubernetes to deploy your app, you might have faced an issue when a migration gets stuck because Liquibase can’t acquire lock. It might look somewhat like this:

liquibase.exception.LockException: Could not acquire change log lock.  Currently locked by LockOwner ...
        at liquibase.lockservice.StandardLockService.waitForLock(StandardLockService.java:236)
        at liquibase.Liquibase.update(Liquibase.java:184)
        at liquibase.Liquibase.update(Liquibase.java:179)
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