If your database is very large and your dynamic audiences require a very long computation time because the definition rules are complex, you might consider using on demand audiences.
This feature allows you to update the contacts that are part of the audience only when you expressly request it, ensuring a faster process when you need to use the audience itself.
To enable the feature, access the Dashboard of the Global database
then, in the Database settings card, click on the Setup button
and finally, in the Default section, enable the option Enable dynamic audiences on demand
During the creation or modification of the audience, you can now select Update on demand. Once this option is enabled, define or review the conditions for inclusion of contacts, as you would normally do with dynamic audiences.
Remember that contacts are updated only when you press the Update now button and that, after the first calculation, the date of the previous update is indicated.
Note: before using the audience, for example, for sending a communication, it's important to request the calculation again to update the included contacts. If you don't perform this step, the audience will contain the contacts from the last performed calculation.