The following error is generated on startup if sga_target is too small:
ORA-00821: Specified value of sga_target 1024M is too small, needs to be at
(I defined a very small sga_target just to reproduce this error.)
The minimum 2576M seems to be host dependent, rather than hardcoded.
The MOS note "DBCA Fails With ORA-00821 Error (sga_target Is Too Small) (Doc ID
2409633.1)" confirms my observation:
"If DBCA cannot find the initialization parameter file, it calculates default
values for processes and memory allocation. It uses the amount of RAM, the
number of cores, and the number of threads to calculate these values and this
can create a very large value for processes and increases the size of the SGA
to accommodate that value."
How does Oracle calculate this minimum, i.e. 2576M?
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