RocksDB write_buffer_size and max_write_buffer_number tuning under a fixed memory budget
RocksDB's documented defaults set write_buffer_size to 64 MiB per column family and max_write_buffer_number to 2. That is adequate for light local workloads, but under sustained production write traffic the memtable fills quickly, flushes queue up, and the write path stalls once the buffer count limit is reached. The unresolved decision is how much memory to