Evan Zhou

We already use BR for clustered index, there seems no incompatibility.

If we use multiple instances, the largest level only contains tens of files.

Maybe singlefight https://pkg.go.dev/golang.org/x/sync/singleflight can solve your problem.

That's a issue with consistent hash algorithm, freecache doesn't use consistent hash.

If you are on 64bit OS, `int` is 64bit, you are able to allocate caches larger than 4GB.

@toontong SetGCPercent lower can reduce the process memory usage. Say the most of the memory is consumed by the cache. If you do not set it lower, the process may...

`min(100, 100 * (total_memory_size - cache_memory_size) / (cache_memory_size))` may be a good number to use.

> > `max(100, 100 * (total_memory_size - cache_memory_size) / (cache_memory_size))` may be a good number to use. > > you meant to min? Yes, fixed.

I will take a look at it this weekend, thank you for your feedback.

I don't know this feature, and I don't know postgres well, If you can implement it and make a pull request, I will merge it.