Web/CLI hangs if cache use cache store and has a lot of entries

My cache configuration has RocksDB's cache. Cache has a more then 1 000 000 entries.
And it do usage of Web interfce and CLI impossible.
As I have investigated, problem can be in class org.infinispan.commands.read.SizeCommand.

public Integer perform(InvocationContext ctx) throws Throwable {
      long size = cache.keySet().stream().count();
      if (size > Integer.MAX_VALUE) {
         return Integer.MAX_VALUE;
      } else {
         return (int) size;
      }
   }

I think, the code must ask CacheStore for sizing.