RocksDB settings

                final long writeBufferSize = 8 * 512 * 1024 * 1024L;
                final long softPendingCompactionBytesLimit = 100 * 64 * 1073741824L;

                options.setAllowConcurrentMemtableWrite(true);
                options.setEnableWriteThreadAdaptiveYield(true);
                options.setBytesPerSync(1024*1024);
                options.setWalBytesPerSync(1024*1024);
                options.setMaxBackgroundCompactions(20);
                options.setBaseBackgroundCompactions(20);
                options.setMaxSubcompactions(8);
                options.setCompressionType(CompressionType.LZ4_COMPRESSION);
                options.setWriteBufferSize(writeBufferSize);
                options.setMaxBytesForLevelBase(4 * writeBufferSize);
                options.setSoftPendingCompactionBytesLimit(softPendingCompactionBytesLimit);
                options.setHardPendingCompactionBytesLimit(8 * softPendingCompactionBytesLimit);
                options.setCompactionPriority(CompactionPriority.MinOverlappingRatio);

                final org.rocksdb.BloomFilter bloomFilter = new BloomFilter(10, false);
                final BlockBasedTableConfig tableOptions = new BlockBasedTableConfig();
                tableOptions.setFilter(bloomFilter);
                options.setTableFormatConfig(tableOptions);