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You can try setting

druid.segmentCache.lazyLoadOnStart

to

true

. That will reduce the startup time a bit.

You could also set

druid.segmentCache.numBootstrapThreads

a bit higher instead. I have found setting it to the number of CPUs (including hyper threading) to be a pretty good value.

@Abhishek Agarwal @Adam Peck thank you. It's definitely faster now 😀