diff --git a/roles/graylog/defaults/main.yml b/roles/graylog/defaults/main.yml
index db61d55..5577914 100644
--- a/roles/graylog/defaults/main.yml
+++ b/roles/graylog/defaults/main.yml
@@ -69,3 +69,6 @@ graylog_journal_max_size: 5
 # on el7, TLSv1.3 seems to break filebeat connections, so, just enable TLSv1.2
 graylog_tls_versions:
   - TLSv1.2
+
+# Mem to allocate to the JVM (Xmx / Xms)
+graylog_jvm_mem: 2g
diff --git a/roles/graylog/templates/graylog-server.service.j2 b/roles/graylog/templates/graylog-server.service.j2
index ecd2a8e..764ffca 100644
--- a/roles/graylog/templates/graylog-server.service.j2
+++ b/roles/graylog/templates/graylog-server.service.j2
@@ -12,7 +12,7 @@ User=graylog
 Group=graylog
 LimitNOFILE=64000
 ExecStart=/usr/bin/java \
-            -Xms2g -Xmx2g -XX:NewRatio=1 -server -XX:+ResizeTLAB \
+            -Xms{{ graylog_jvm_mem }} -Xmx{{ graylog_jvm_mem }} -XX:NewRatio=1 -server -XX:+ResizeTLAB \
             -XX:+UseConcMarkSweepGC -XX:+CMSConcurrentMTEnabled \
             -XX:+CMSClassUnloadingEnabled -XX:-OmitStackTraceInFastThrow \
             -cp {{ graylog_root_dir }}/app/graylog.jar{% if graylog_libs.keys() | list | length > 0 %}{% for lib in graylog_libs.keys() | list %}:{{ graylog_root_dir }}/app/lib/{{ lib }}-{{ graylog_libs[lib].version }}.jar{% endfor %} {% endif %} \