Consider length limit for label values on ingestion

[brian-brazil]

We could end up with such a long labelvalue that it causes performance issues (e.g. if a metric was split out by a user-provided customer name). It might be an idea to have a limit on how long a label value can be, defaulting to something like 1KiB.

[beorn7]

I'm against an arbitrary limit. While label values could become too long accidentally, I'm sure somebody will be able to come up with a legitimate use-case for any label value length eventually.

Obviously, we are “vulnerable” to abusive clients, but we are that anyway. E.g. it's very easy to create millions of time series in a very short time and bring down the server. The responsibility of not overloading the server lies with the client.

[juliusv]

I think I'm with @beorn7 on this one. Should we close it?

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.