MKV is "everywhere" compared to D1 (which is limited to DO colos), and gets faster as it gets more requests
Bhow does it get faster as it gets more requests ?
MTracking where Durable Objects are created, wherever you are in the world.
MCloudflare Docs
KV is a global, low-latency, key-value data store. It stores data in a small number of centralized data centers, then caches that data in Cloudflare’s …
MWhat do you want to know?
M@kenton you probably know more if you're still around
K"cold starts" at present happen ~daily but we have work ongoing to make them less common.
Koh, I thought you meant cold starts of the database but it sounds like you mean something else
Kwhat exactly are you measuring? It sounds like you are measuring from your home machine and not from a Worker? What exactly are you running?
Kis this running on cloudflare or locally?
Kit does seem high, but hard to tell without a lot of debugging where the bottleneck is. To be honest I'm not actually the expert here, I work mostly on the deep back-end side. There are definitely things in the works to improve latency, like read replicas. We also plan to enable sqlite in DO itself, in which case the database is actually local so latency is zero (but in that case some distributed system design matters become the app's resonsibility).
Moh interesting! I thought smart placements don't affect workers with d1. according to the docs they must be colocated closest to the d1
KYeah, smart placement did not originally support D1 but I believe it does now.
Wait though, do you only experience these "cold starts" when using smart placement?
Wait though, do you only experience these "cold starts" when using smart placement?
KRegarding KV: For pure reads, when hitting cache, if KV is not faster than D1, something is wrong with KV. KV is all about incredibly fast reads particularly for hot keys. It gets a lot slower for cold keys (try reading a randomly-generated key name and see how long it takes to return null), and writes are extremely slow (both to complete, and then to propagate -- the latter could take a minute). With D1, on the other hand, at present, a write will only take slightly longer than a read, and once it completes at all it is fully "propagated" (D1 is strongly consistent).
