| Gehel added a comment. |
Thanks for the feedback!
In T199228#4715815, @Jheald wrote:This requires WDQS to be reasonably up to date most of the time. A lag of 5 minutes isn't such a problem. An occasional longer lag, if clearly signposted as the WDQS GUI does, also isn't such a problem -- if the server is having a slow moment, one can go away and work on something else for a while.
In the current situation, we are doing far worse than only occasional lag higher than 5 minutes (see graph of the last 7 days). Being able to support this kind of SLO would require a significant amount of work and rearchitecture.
I'm not saying we should not do it, just that we're not there at the moment. And that if we put a strong constraint on updater lag, we should review the way we manage this public endpoint.
However, what is even worse for this workflow is if edits get missed -- ie leading to anomalies that should be reported getting missed, or anomalies that should have been cleared failing to disappear. Accurate eventual synchronisation remains the #1 priority.
@Smalyshev is doing great work in tracking the synchronisation issues! I don't think we have a good measurement of the miss rate (having that measure is probably almost as hard as fixing the actual issues).
I note that if we manage to formally define an SLO, missed edit should be part of it.
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