Memory parameter calculation on IBM Data Server Manager home page

Answer

In DSM, memory in Home page is calculated via DB2 table function MON_GET_MEMORY_POOL with sql as following:
db2 "SELECT varchar(db_name, 20) AS dbname, sum(memory_pool_used), sum(memory_pool_used_hwm) FROM TABLE(MON_GET_MEMORY_POOL(NULL, CURRENT_SERVER, -2)) group by db_name"

The result is in KB and we change it to GB before displaying it on DSM home page.

With MON_GET_MEMORY_POOL, private memory is included in the result.
http://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.sql.rtn.doc/doc/r0059464.html

To verify, I tried on my environment and the display value is correct:

db2 "SELECT varchar(db_name, 20) AS dbname, sum(memory_pool_used), sum(memory_pool_used_hwm) FROM TABLE(MON_GET_MEMORY_POOL(NULL, CURRENT_SERVER, -2)) group by db_name"

DBNAME 2 3
-------------------- -------------------- --------------------
SAMPLE 239552 257216
- 286080 535168

(239552 + 286080)/1024/1024 = 0.501GB



Also, the same could be confirmed through 'db2top' as well.
Memory in DSM Home page = db2top memory + Private Mem

(11233664+156160)/1024/1024=10.86GB