this post was submitted on 30 Jul 2023
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Weekly Explosions Blog

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Weekly Explosions Blog

This is where we blog about the articles and discussions that have been active this week.

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Server Upgrade Complete - V18.3 (join-lemmy.org)
submitted 2 years ago by admin@exploding-heads.com to c/main@exploding-heads.com
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Just a short note to let you know, we upgraded the server to the latest version of Lemmy today. Here are the upgrade notes:

This version brings major optimizations to the database queries, which significantly reduces CPU usage. There is also a change to the way federation activities are stored, which reduces database size by around 80%. Special thanks to @phiresky for their work on DB optimizations.

The federation code now includes a check for dead instances which is used when sending activities. This helps to reduce the amount of outgoing POST requests, and also reduce server load.

In terms of security, Lemmy now performs HTML sanitization on all messages which are submitted through the API or received via federation. Together with the tightened content-security-policy from 0.18.2, cross-site scripting attacks are now much more difficult.

Other than that, there are numerous bug fixes and minor enhancements.

Take it for a spin and let me know what you think

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[–] manapropos@exploding-heads.com 5 points 2 years ago

I couldn’t even load posts on wefwef or memmy yesterday. All good now though

[–] masterofballs@exploding-heads.com 5 points 2 years ago

Does seem to be running much faster

[–] Owner_of_donky@exploding-heads.com 3 points 2 years ago* (last edited 2 years ago) (1 children)

Nice! How is the CPU usage rn?

[–] admin@exploding-heads.com 3 points 2 years ago (1 children)

CPU usage is now averaging less then 20% with spikes to 45%

[–] Sexypink@social.fbxl.net 3 points 2 years ago

@admin yay 🙌🙌

[–] Freedom@exploding-heads.com 3 points 2 years ago

Glad to hear

[–] Sexypink@exploding-heads.com 3 points 2 years ago

Did you upgrade because I reminded you

[–] admin@exploding-heads.com 2 points 2 years ago

It has been a rocky road upgrading from the stable Lemmy 17,4 to the various 18.x upgrades.

I apologize for the inconvenience this has caused you.

But the V18.3 upgrade competed yesterday looks like it is a definite return to stability.

The server stats look good. I have put the system through its paces this morning and all seem to have performed well.

Enjoy.

[–] Lovstuhagen@exploding-heads.com 2 points 2 years ago

Very wonderful so far!