I have to process 3000 RAW images in Camera Raw. The computer freeze because lacking of memory. It is possible to make changes in the same jpg files from the camera (RAW+JPG) and after pass the changes to the correspondent RAWs?
No. The underlying data of the RAW files and the JPGs is different so the settings that look good on one would not look good on the other.
It seems like you should be able to process a few RAWs at a time and not have problems. If the issue is that Bridge is using too much memory because it has all the 3000 thumbnails loaded, then divide the RAWs across a few different folders, perhaps where the lighting is different so there is less chance you'll need to replicate settings across from one folder's images to the other, so Bridge is only loading a subset of the 3000 thumbnails.