Adobe Reader program uses huge memory in OS X. How to reduce it or any settings to change?

Lately I started to do alot of research on paper works for University projects. Most of the downloaded papers are based on .pdf extension. As usual, I read these files via Safari or open it separetly via Adobe Reader itself.

While working on Papers, I noticed that my machine's memory spiked to 7 GB ++ almost reaches 8GB of memory usage. This is unusual. At one point, I ran Java programs and simulatenous opened up many pdf format files format on my safari browser, it went unresponsive and unable to use keyboard & trackpad. Had no choice, had to hard reboot.

Contacted Apple support and reported the issue on unresponsive to them. They provided following KB to troubleshoot further:

http://support.apple.com/kb/HT1379

http://support.apple.com/kb/TS4636

After that, I never encounter unresponsive issue but I have question Adobe reader program. This program uses huge amount of memory and I would like to know if there is anyway I can reduce the usage of memory of Adobe reader. Or is this normal?

Also, had an issue with pdf page scrolling, it is very slow.

Thank you,

Soma