this post was submitted on 23 May 2024
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Lemmy

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Latency in replies going through seems to grow as the instance uptime increases (lemmy.ml)
submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]
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Just a general observation I've made in my time on lemmy.ml, which I figure is attributable to lemmy the software, that may or may not be useful.

I'm talking about writing comments to posts (or replies to other comments, not sure if I've seen a difference).

And, just anecdotally, it seems that the longer the instance has been up without a restart or update (AFAICT of course), the longer the time between me clicking the Reply button and the time that the request is completed.

Usually, the first sign in my experience that the instance has been restarted is that this latency speeds right up to being almost instantaneous.

Anyone else notice the same or on other instances? It might be a clue to performance issues??

EDIT: applies to posts too (including this one incidentally)

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[–] [email protected] 8 points 5 months ago (1 children)

Hmm, there is a memory leak issue with PostgreSQL versions lower than 16.2, so instances would run out of RAM and start swapping after a while. But it would surprise me if lemmy.ml specifically was suffering from that as the devs surely know about this issue.