Checking Memory and Swap Space

Oracle says that the system must have at least 512MB of RAM and 1GB of swap space or twice the size of RAM. And for systems with more than 2 GB of RAM, the swap space can be between one and two times the size of RAM. You might also want to check out The quick search Engine
For test sake I tried to install an Oracle Database 10g (Type: General Purpose Database) on a little PC with 256MB of RAM and 1 GB of swap space. I was able to get a 10g database up and running on this little PC without a problem.

To check the size of physical memory, execute:

grep MemTotal /proc/meminfo

To check the size of swap space, execute:

grep SwapTotal /proc/meminfo

You also can add temporary swap space to your system by creating a temporary swap file instead of using a raw device. Here is the procedure:

su - root
dd if=/dev/zero of=tmpswap bs=1k count=900000
chmod 600 tmpswap
mkswap tmpswap
swapon tmpswap

To disable the temporary swap space execute the following commands:

su - root
swapoff tmpswap
rm tmpswap

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