Assuming bytecount is required, the following 2 results were found.
The ReportServer Databasehttps://joellipman.com/articles/database/the-reportserver-database.html
Status nvarchar(32) NOT NULL either rsSuccess or an error code; if multiple errors occur, only the first error is recorded ByteCount bigint NOT NULL Size of rendered reports in bytes. RowCount bigint NOT NULL Number of rows returned from queries....
c.[Name] AS [ReportName] , e.[ReportID] AS [ReportID] , e.[TimeStart] AS [TimeStamp] , e.[Parameters] AS [Parameters] , e.[ByteCount] AS [Size] , e.[TimeDataRetrieval] AS [Data Retrieval] , e.[TimeProcessing] AS [Process Time] , e.[TimeRendering] AS...