You can use the Memcache module to move some common cache queries out of the database and into memory. Information held in memory retrieves faster than information retrieved from a database query.
Memcached is available for all Cloud Platform websites. See Using Memcached for information about how to use Memcached with a Cloud Platform-hosted Drupal website.
More caching information
For more information about caching on your Drupal website, see Caching overview.