A Pull Request should be associated with an Issue.

We'd like to set the minimum chunk size to a value lower than 100. Copying 100 rows at a time is fine for tables that have a low average row length, but copying 100 rows at a time from tables that have a large average row lengths is causing replication lag in our clusters.

Description

This PR lowers the minimum chunk-size value from 100 to 10.

• contributed code is using same conventions as original code
• script/cibuild returns with no formatting errors, build errors or unit test errors.