Kilop.Net

I am trying to find the memory utilization per database(using dmvs) in a sql server instance, ie (Buffer Cache + Procedure Cache) over a period of time. I have the query to get the buffer cache utilization, what i require is procedure cache, plus any other parameter that a database will use in terms of memory.

SELECT DB_NAME(database_id) AS [Database Name],
COUNT(*) * 8/1024.0 AS [Cached Size (MB)]
FROM sys.dm_os_buffer_descriptors
WHERE database_id > 4 -- system databases
AND database_id <> 32767 -- ResourceDB
GROUP BY DB_NAME(database_id)    
ORDER BY [Cached Size (MB)] DESC OPTION (RECOMPILE);