static int getBufferSize(Configuration conf) {
    return conf.getInt(SNAPPY_BUFFER_SIZE_KEY,
      conf.getInt(CommonConfigurationKeys.IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY,
        CommonConfigurationKeys.IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_DEFAULT));
  }
Return true if the native shared libraries were loaded; false otherwise.
hbase-compression/hbase-compression-snappy/src/main/java/org/apache/hadoop/hbase/io/compress/xerial/SnappyCodec.java