Sql-server – Audit user activity in SQL Server

One consideration would be to query the sys.dm_audit_actions view at regular intervals to see what new information has been logged to the audit log. For example, create a stored procedure to mail the results of a query from this view to a set of people on a daily basis. The only drawback would be that it wouldn't be delivered as it happens (asynchronously) unless you wanted to script it in .Net.

Have you tried reading your audit using sys.fn_get_audit_file?

-- query all audit files in the D:\audit directory
SELECT *
 FROM sys.fn_get_audit_file('D:\audit\*.sqlaudit', default, default)

The CREATE SERVER audit TSQL command you used did not specify

MAXSIZE = { max_size } The default value is UNLIMITED.

MAX_ROLLOVER_FILES ={ integer | UNLIMITED} The default value is UNLIMITED.

MAX_FILES =integer Specifies the maximum number of audit files that can be created. Does not rollover to the first file when the limit is reached. When the MAX_FILES limit is reached, any action that causes additional audit events to be generated will fail with an error.

Not sure what the default is for MAX_FILES but its probably the FS limit which is somewhere around two billion.

So no there should not be any limit on the size of the audit files generated or the number of rows stored within them.