adjust run-clara memory calculation (#1070)

Author: baltzell

bin/run-clara

@@ -52,14 +52,9 @@ shift $((OPTIND-1))
 inputs=$@
 
 # Configure JVM memory settings (overridedable via $JAVA_OPTS):
-if [ -z ${large+x} ]
-then
-    gb_max=$((threads<3?threads+2:threads+2-threads/4))
-    gb_init=$((threads<3?threads:threads-threads/3))
-else
-    gb_max=$((threads<3?threads+2:threads+2-threads/8))
-    gb_init=$((threads<3?threads:threads-threads/6))
-fi
+gb_init=$((threads))
+gb_max=$((threads+2))
+[ $threads -gt 1 ] && ! [ -z ${large+x} ] && gb_max=$((threads*2))
 java_opts="-Xms${gb_init}g -Xmx${gb_max}g"
 
 # Check configuration: