Get memory in Oracle R Enterprise

How can I increase memory for ORE? My server have 10G free memory, but I can't use all of them for ORE. These commands have error:

begin
sys.rqscriptDrop('clustering_test');
sys.rqscriptcreate('clustering_test','function(n){
                                    rm(list=ls())
                                    n=20000
                                    d=dist(data.frame(x=rnorm(n),
                                                      y=rnorm(n)))
                                    }');
end;

But these commands could run on R in server:

n=20000
d=dist(data.frame(x=rnorm(n),y=rnorm(n)))

n depends to your free system RAM