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# clouds
steep-balloon-41261
08/15/2023, 4:30 PMThis message was deleted.
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dry-elephant-14928
08/15/2023, 11:32 PMthinking about this.. we currently don't expose this in a meaningful way.. end to end latency is essentially three legs:
• publisher -> SFU
• SFU <-> SFU (routing within our mesh)
• SFU -> subscriber
you can currently get publisher -> SFU stats from a publisher's webrtc stats and similarly for the subscriber
we currently don't expose any info for the time spent within the Mesh..
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dry-elephant-14928
08/15/2023, 11:32 PMCC: @acoustic-engineer-41666
dry-elephant-14928
08/15/2023, 11:33 PMwould be great to expose within the dashboard.. perhaps under published and subscribed tracks (avg end to end latency)
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acoustic-engineer-41666
08/15/2023, 11:43 PM@important-telephone-80974 what’s your goal here? Is this for internal metrics or do you want to share this with your users?
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important-telephone-80974
08/15/2023, 11:44 PMThanks - this is just for me. I will likely have a bunch of different rooms / different publishers and I want to see at one glance outliers etc
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important-telephone-80974
08/15/2023, 11:45 PMSo I would have this within my internal dashboards (grafana dashboards or others) and alert in case of big outliers
important-telephone-80974
08/15/2023, 11:46 PMSo ideally ability to grab metrics and publish them in a Prometheus compatible format or other would be a big plus
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important-telephone-80974
08/15/2023, 11:47 PMBut just in the livekit dashboard is great already 👍
important-telephone-80974
08/17/2023, 12:45 PMAnother aspect that I had actually forgotten about:
• I need to sync some metadata with the video / audio. So if the delay of the media is 1s, I need to delay the metadata by 1s as well etc. This is actually more important for me - and that cannot be really solved with metrics in the dashboard
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dry-elephant-14928
08/17/2023, 5:35 PMthat makes sense.. though that problem goes away if the latency is never 1s right?
generally speaking, something is seriously wrong if latency is pushing that high.. when things are operational, we expect latency to be between 80ms-500ms end to end.
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important-telephone-80974
08/17/2023, 5:36 PMyeah I don’t need to synchronise as much if the delay is < 200-300ms, 500ms is the limit for my use case. Basically the user can press a bunch of buttons on the website which impacts the live stream, so they get a straight feel of the latency by how fast the stream responds
important-telephone-80974
08/17/2023, 5:37 PMat 1s - 1.5s, it feels a bit painful. Right now, I don’t really have any insights on that which is an issue for my use case
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dry-elephant-14928
08/17/2023, 5:37 PMfor sure! this is the problem with cherry crush on TikTok 🤣
dry-elephant-14928
08/17/2023, 5:38 PMI think part of the reason why this is the case is due to ingest delays you are seeing. if we can optimize that path, ideally you don't have to worry about synchronizating metadata
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important-telephone-80974
08/17/2023, 5:39 PMyeah that makes sense
important-telephone-80974
08/17/2023, 5:49 PMotherwise, I am not familiar with cherry crush on tiktok 😛 will look up what that it is!
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dry-elephant-14928
08/17/2023, 5:51 PMlol, it's a silly TikTok account that pretends to be an NPC while viewers gifts her food items.. it's gotten viral lately
you can tell the 5s+ latency resulting from them using HLS
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important-telephone-80974
08/17/2023, 5:53 PMah ok 🙂 I think I remember seeing it on Twitter / X now that you mention what it is... I just didn’t know that name