[throwusawayus]

tracking access time (every read) is huge performance bottleneck. especially if reliably persisting this

same reason why filesystems are often mounted with noatime attribute !

[daenz]

Yes, the sensible default for this feature would be opt-out, like noatime, in case you need the performance boost and understand the implications of the choice.

[samlambert]

This feature has zero performance impact on your database. It is powered by insights which is served from a separate data store.

[solardev]

I think they meant if you were to add this as a default metadata feature into mainline mysql