How to maintain Azure SQL Indexes and Statistics

Hi

We are on Pricing Tier -> Premium P4: 500 DTUs

Manually ran Ola Hallengrens script modified as below

@FragmentationMedium nvarchar(max) = 'INDEX_REORGANIZE,INDEX_REBUILD_ONLINE',
@FragmentationHigh nvarchar(max) = 'INDEX_REBUILD_ONLINE,INDEX_REBUILD_OFFLINE',
@FragmentationLevel1 int = 50,
@FragmentationLevel2 int = 80,

@UpdateStatistics = 'ALL',
@OnlyModifiedStatistics = 'Y',
@StatisticsSample int = NULL

This should be less intensive than a fullscan option scanning all rows in a table or doing an index rebuild at lower fragmentation levels

Despite this the Compute Utilization quickly reaches 100% - even thought this was running out of hours i stopped the process after 7 minutes

Is this expected behaviour at this Pricing Tier?

We would like to schedule this to run weekly.

Thanks