# Customizing Data APIs usage You can edit some configuration parameters to refine the volume of data that can be exchanged between the Remote Engine Gen2 and the database you created a [Managing Data APIs](https://help.qlik.com/talend/en-US/data-inventory-user-guide/Cloud/managing-data-apis) on, depending on your usage. Parameters configurable in default/.env file in the Remote Engine Gen2 installation directoryParameters configurable in default/.envdefault/.env file in the Remote Engine Gen2Remote Engine Gen2 installation directory | Parameter | Description | | --- | --- | | DATASET\_API\_NUMBER\_CONNECTIONS\_PER\_DATABASE | This parameter allows you to control the number of permanent
connections opened by the Remote Engine Gen2 with a database.

More connections means that you can handle more
requests in parallel, but in return, the database can also protect
itself by setting a maximum number of parallel connections, regardless
of the origin.

The default value is 5. | | DATASET\_API\_JDBC\_FETCH\_SIZE | This parameter allows you to control the number of records coming
from the database, that the Remote Engine Gen2 will have to process at a given time.

Setting a low value will
reduce the memory footprint of the JVM, but will increase the number
of exchanges with the database.

Setting a high value will reduce
the number of exchanges with the database.

Setting this value to
0 will disable this feature. With each request to
the database, all records are retrieved in one operation.

The
default value is 0. | | DATASET\_API\_ODATA\_MAX\_SERVER\_PAGE\_SIZE | This parameter allows you to control how much records are paginated
on the server side and written to the OData client.

OData clients are
usually able to automatically consume several consecutive
pages.

Setting a low value mean that the server only handles a
few records at a time, and consumes less memory.

Setting a high
value means that the server will handle a high number of records at a
time.

Setting this parameter to 0 means there will be no server
side pagination

The default value is
100. |