Post #4487101
2026-08-09 15:09 UTC
I likely won't be answering many questions about information not already in the posts. I'm using my discretion here as an experienced operator to determine which information my employer would consider sensitive—often that's "what does it do" and "what's the scale on that Y axis". I also mostly work with open source software, which makes this somewhat less fraught.
I think it would be cool if other people post their own graphs to this hashtag, but... use your own judgement. Think about what you would feel comfortable sharing in a public bug report against a library.
#GraphMystery
Replies (1)
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@varx@infosec.exchange 2026-08-09 15:15
Here's the first puzzle, a warm-up. This is a recent heat map of memory usage in an HTTP service. What caused these four prominent "spurs" you see along the top? (More context, not all necessarily relevant: The service is running in Kubernetes, so the samples represent containers, each container running multiple workers. The Y axis, not shown, starts at zero. Time zone for X axis is unspecified.) Anything else can you figure out from this graph? #GraphMystery