Can database console and cloud control co-exist ?

I found the answer is YES in my 11.2.0.2 RAC env , the 12c cloud control.  So we don't have drop local repository before install cloud control agent to the target host, except for the Cloud Control Repository database. 

:)

and I found if I stop dbconsole , it can save me 400+MB memory.

This is 12c cloud control screenshot.

And here is 11gR2 database control screenshot 

Monitor memory

orarac1poc:ORCL1:/home/oracle> ps -ef |grep dbcon
oracle   16750 15429  0 16:32 pts/4    00:00:00 grep dbcon
orarac1poc:ORCL1:/home/oracle> emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.2.0
Copyright (c) 1996, 2010 Oracle Corporation.  All rights reserved.
https://orarac1poc:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 11g Database Control ...... started.
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/product/11.2.0/db_2/orarac1poc_ORCL/sysman/log

[grid@orarac1poc admin]$ ps -ef |grep dbcon
grid     14790 22909  0 16:28 pts/1    00:00:00 grep dbcon
oracle   15362     1  0  2012 ?        00:02:10 /u01/app/oracle/product/11.2.0/db_2/perl/bin/perl /u01/app/oracle/product/11.2.0/db_2/bin/emwd.pl dbconsole /u01/app/oracle/product/11.2.0/db_2/orarac1poc_ORCL/sysman/log/emdb.nohup

orarac1poc:ORCL1:/home/oracle> emctl stop dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.2.0
Copyright (c) 1996, 2010 Oracle Corporation.  All rights reserved.
https://orarac1poc:1158/em/console/aboutApplication
Stopping Oracle Enterprise Manager 11g Database Control ...
 ...  Stopped.

Add 10g information of DB Control versus Grid Control  I just found.