Out of memory Error

You can adjust the usage of RAM that Minecraft will takes by the following steps:
1. Run your Minecraft launcher
2. Switch to the installation tab
3. Hover the installation that you want to play with your mouse cursor
4. Click the "more" (the three dots button) button
5. Click "edit" button
6. Click "more options" button
7. Then you will see the "JVM arguments" keywords, edit the "-Xmx2G" below the keyword by changing the number "2" to "1"
8. That's it! Now your Minecraft will only takes 1 GB of your computer RAM. Enjoy!