Mander

531 readers

2 users here now

founded 3 years ago

MODERATORS

Sal@mander.xyz

Performance issues? (mander.xyz)

submitted 1 month ago by BB84@mander.xyz to c/mander@mander.xyz

14 comments fedilink hide all child comments

Server is slow for me in the past few days. Anyone else feeling the same?

you are viewing a single comment's thread
view the rest of the comments

[–] admiralpatrick@lemmy.world 5 points 1 month ago (1 children)

Check your web access logs for these 3 IPs:

134.19.178.167
213.152.162.5
134.19.179.211

And see if they're making repeated un-scoped (no page paramater) requests to /api/v3/comment/list. If they are, block them in your firewall.

Those used to hit my instance constantly with requests like /api/v3/comment/list?sort=Old&page=16514 (yes, page 16,414). When I blocked those IPs making those requests, problem solved.

[–] Sal@mander.xyz 3 points 1 month ago

Thanks!

I don't see those specific IPs, nor 16514. But now I see what scrapers tend to look like in the logs :)

I am now pretty sure that the cause was scraper-like activity coming from the Mlmym front-end that I am serving over an onion site. I am not sure if it randomly started mis-behaving or if a tor scraper was using it.

After blocking this, federation was restored, performance increased, and CPU use came down: