How much more memory is needed by 11gR2 DBConsole

When assessing database upgrade, we'll need to know actual overhead need for newer version, which may not be found from Oracle document, or accurate enough for our own environment.  e.g, in order to run 11gR2 database, my finding for development is 500Mb and production is 800Mb. The 300Mb (if I remember correctly) in oracle document may easily lead to ORA-4031.

Today did the experiment on four DBConsoles , comparing 10.2.0.2 and 11.2.0.2.
The following shows the figure of Total Memory (VM) and Residential Memory(User memory) using HP-UX 11i IA v3 glance utility,  when I shutdown 4 DBConsoles one by one.

shutdown 10g dbconsole	init	1 Console	2 Consoles	3 Consoles	4 Consoles	Average
Total VM(Gb)	22.5	21.8	21.3	20.7	20	0.625
user memory (Gb)	10.6	10.4	10.2	10	9.7	0.225
shutdown 11g dbconsole	init	1 Console	2 Consoles	3 Consoles	4 Consoles	Average
Total VM(Gb)	27.8	26	24.2	22.5	20.6	1.8
user memory (Gb)	16.4	15.9	15.3	14.8	14.3	0.525

 

From above tables, it is clear that 11.2.0.2 DBConsole is almost 3 times than that in 10.2.0.2 , both total memory and physical memory.

For those doing capacity planning, please don't take for granted and overlook harware requirement by different version.