sga size

Hi,

I got the following output after I restartup my oracle server.

Total System Global Area       4762032 bytes
Fixed Size                       39816 bytes
Variable Size                  4304424 bytes
Database Buffers                409600 bytes
Redo Buffers                      8192 bytes

can somebody explain
what is Fixed Size? and Variable Size?
how their number comes out 39816?4304424? by adding up other number?

thanks,

Paul. Received on Tue Oct 27 1998 - 17:28:46 CST