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submitted 11 months ago by favrion@lemmy.ml to c/fediverse@lemmy.ml

Ugh.

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[-] RoundSparrow@lemmy.ml 8 points 11 months ago* (last edited 11 months ago)

It’s mostly DDOS attacks though, not the influx of normal users.

Really? As site_aggregates table getting 1500 rows updated on every single new comment and post local insert is just the tip of the iceberg of how nobody has scrutinized the PostgreSQL performance. Thank you to lemmy.ca last weekend for looking at AUTO_EXPLAIN on their data.

[-] astral_avocado@programming.dev 5 points 11 months ago

As site_aggregates table getting 1500 rows updated on every single new comment

Is this accurate?

[-] RoundSparrow@lemmy.ml 4 points 11 months ago
[-] astral_avocado@programming.dev 2 points 11 months ago* (last edited 11 months ago)

Huh? I'm not an instance operator (yet). I was actually asking you a question, does this actually happen? Have you seen this on your own instance?

Was hoping to get some discussion going on this.

Edit: do you have any example logs from your postgres instance demonstrating this?

[-] RoundSparrow@lemmy.ml 2 points 11 months ago

do you have any example logs from your postgres instance demonstrating this?

I've exposed raw data from my PostgreSQL tables. And every single new comment and post you could see +1 going on every known server. I haven't updated to 0.18.3 yet, so it's still there: https://lemmyadmin.bulletintree.com/query/raw_site_aggregates?output=table

this post was submitted on 31 Jul 2023
220 points (100.0% liked)

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