With the recent capability of setting retention period for Log Analytics data per table a lot of new possibilities of managing and retaining your data pop-up. A common scenario is that you may have a lot of performance data which may be logged every minute or even every 10 seconds. You need that data in such short intervals in your Log Analytics workspace only for the past month or so but you do not need such granularity for older data. At the same time it is good to have some summarization (aggregation) of that data for longer period due to compliance, analysis, etc but there is a cost associated when you retain a lot of data for longer period. By using serverless and the new per table retention capability now you can achieve this and save cost. In this blog I will show you how you can achieve this with simple example.