Post AznUPhDh2dexaYZIh6 by picofarad@noauthority.social
 (DIR) More posts by picofarad@noauthority.social
 (DIR) Post #AznUJmXWLkSGLm1S9A by dotstdy@mastodon.social
       2025-11-01T08:01:01Z
       
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       RE: https://mastodon.social/@dotstdy/115473335676948840I read performance investigations sometimes, and I do really wish people would try slightly harder to find root cause, rather than randomly changing config.
       
 (DIR) Post #AznUJnHFbj2CdbPyQS by dotstdy@mastodon.social
       2025-11-01T08:30:05Z
       
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       It's totally fine not to fix things of course, but it's really weird to me when people power through without asking why something is slow, rather than just accepting it as a fact of the world, and working around it. I imagine this is a recurring problem in the "soup of microservices" model generally, because it so effectively obfuscates the work that's actually happening. Here it looks like watching a list for changes is likely done in a pretty naive way and it causes very poor scaling.
       
 (DIR) Post #AznUJoBGFTpzRJchjE by picofarad@noauthority.social
       2025-11-01T09:21:28Z
       
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       @dotstdy "picofarad you need to stop complaining about the PR and just merge, the deadline is thursday evening. You can't keep bellyaching about 20 milliseconds; it's twenty milliseconds, for goodness sakes"
       
 (DIR) Post #AznUJsumeAd07ex7Eu by dotstdy@mastodon.social
       2025-11-01T08:35:52Z
       
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       also i didn't realize that kubenetes was a golang disaster lol https://kubernetes.io/blog/2024/12/17/kube-apiserver-api-streaming/#why-does-kube-apiserver-allocate-so-much-memory-for-list-requestsSo if you use list, every query is going to be bonkers, and if you use watch they're going to add a (per-connection?) cache, sized to your query to avoid spamming the poor GC, but with a fixed (per-connection?) memory overhead. But if you have the newest hotness they will stream the list instead of generating huge amounts of garbage, at least.
       
 (DIR) Post #AznUPhDh2dexaYZIh6 by picofarad@noauthority.social
       2025-11-01T09:22:34Z
       
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       @dotstdy "back when i was doing siebel databases we'd have sold our souls for a 20ms query, get over it, i've been in this business for 20 years"