diff --git a/ice-rest-catalog/pom.xml b/ice-rest-catalog/pom.xml
index 64a08a47..39762ecc 100644
--- a/ice-rest-catalog/pom.xml
+++ b/ice-rest-catalog/pom.xml
@@ -275,6 +275,7 @@
         <artifactId>really-executable-jar-maven-plugin</artifactId>
         <version>2.1.1</version>
         <configuration>
+          <flags>-XX:MaxRAMPercentage=75.0</flags>
           <!--<flags>-Xmx512m</flags>-->
           <inputFile>target/ice-rest-catalog-jar-with-dependencies.jar</inputFile>
           <programFile>ice-rest-catalog-jar</programFile>
diff --git a/ice/pom.xml b/ice/pom.xml
index 37f81bad..b734d21d 100644
--- a/ice/pom.xml
+++ b/ice/pom.xml
@@ -454,6 +454,7 @@
         <configuration>
           <!--use `_JAVA_OPTIONS=-Xmx512m ice ...` to set at runtime-->
           <!--<flags>-Xmx512m</flags>-->
+          <flags>-XX:MaxRAMPercentage=75.0</flags>
           <inputFile>target/ice-${project.version}-shaded.jar</inputFile>
           <programFile>ice-jar</programFile>
         </configuration>