How can I improve the performance of Rails migrations?

How can I improve the performance of Rails migrations?

To improve Rails migration performance, consider using batch processing, disabling indexes temporarily, and using the :disable_ddl_transaction option.

What is batch processing in this context?

Batch processing involves breaking down large data operations into smaller chunks, which can reduce memory usage and speed up the migration.

Are there any specific commands or options I should use?

Yes, you can use add_index with algorithm: :concurrently to avoid locking the table during index creation.

What about rolling back migrations? Does that affect performance?

Yes, rolling back migrations can be slower if they involve large data changes. It's best to plan migrations carefully to minimize rollbacks.