[D1] Adding PRAGMA optimize for D1

src/content/docs/d1/best-practices/use-indexes.mdx

@@ -82,6 +82,10 @@ This will return output resembling the below:
 
 Note that you cannot modify this table, or an existing index. To modify an index, [delete it first](#remove-indexes) and [create a new index](#create-an-index) with the updated definition.
 
+## Run `PRAGMA optimize`
+
+After creating an index, run [`PRAGMA optimize`](/d1/sql-api/sql-statements/#pragma-optimize) to improve your database performance.
+
 ## Test an index
 
 Validate that an index was used for a query by prepending a query with [`EXPLAIN QUERY PLAN`](https://www.sqlite.org/eqp.html). This will output a query plan for the succeeding statement, including which (if any) indexes were used.

src/content/partials/d1/use-pragma-statements.mdx

@@ -411,3 +411,11 @@ PRAGMA defer_foreign_keys = off
 ```
 
 Refer to the [foreign key documentation](/d1/sql-api/foreign-keys/) to learn more about how to work with foreign keys.
+
+### `PRAGMA optimize`
+
+Attempts to optimize all schemas in a database by running various maintenance operations.
+
+We recommend running this command after creating an index.
+
+Refer to [SQLite PRAGMA optimize documentation](https://www.sqlite.org/pragma.html#pragma_optimize) for more information on how the command optimizes a database.