diff --git a/dumpling-overview.md b/dumpling-overview.md index b958c78dd3802..7c468217741e6 100644 --- a/dumpling-overview.md +++ b/dumpling-overview.md @@ -236,7 +236,7 @@ Examples: The exported file is stored in the `./export-` directory by default. Commonly used options are as follows: - `-o` is used to select the directory where the exported files are stored. -- `-F` option is used to specify the maximum size of a single file (the unit here is `MiB`; inputs like `5GiB` or `8KB` are also acceptable). +- `-F` option is used to specify the maximum size of a single file (the unit here is `MiB`; inputs like `5GiB` or `8KB` are also acceptable). It is recommended to keep its value to 256 MiB or less if you plan to use TiDB Lightning to load this file into a TiDB instance. - `-r` option is used to specify the maximum number of records (or the number of rows in the database) for a single file. When it is enabled, Dumpling enables concurrency in the table to improve the speed of exporting large tables. With the above options specified, Dumpling can have a higher degree of parallelism.