Hacker News Reader

Fascinating. How reliable is the measurement apparatus? Or to put it another way, how tolerant of missed measurements is this scheme? I’ve been in a similar situation in a past life and we took a different approach. I was never satisfied with how we ended up doing it though.

View on HN

I see your point. Some of our measurements are counters and interpolate missing data via certain rules. We store these interpolations in a separate table with exactly the same format and join the two tables directly when querying the data. Since the real value always takes precedence over the interpolated value this is just a COALESCE(realmeasure0000, interpolation0000) statement.

This is super fast when taking advantage of postgres' partition-wise joins.

That’s really neat, thanks for explaining!

Reply on news.ycombinator.com