diff --git a/conf/spark-env.sh.template b/conf/spark-env.sh.template
index 192d3ae09113471612ad80c8cbe567ac93783a9d..c05fe381a36a79240d905321cba40b87d4cdfbed 100755
--- a/conf/spark-env.sh.template
+++ b/conf/spark-env.sh.template
@@ -38,6 +38,7 @@
 # - SPARK_WORKER_INSTANCES, to set the number of worker processes per node
 # - SPARK_WORKER_DIR, to set the working directory of worker processes
 # - SPARK_WORKER_OPTS, to set config properties only for the worker (e.g. "-Dx=y")
+# - SPARK_DAEMON_MEMORY, to allocate to the master, worker and history server themselves (default: 1g).
 # - SPARK_HISTORY_OPTS, to set config properties only for the history server (e.g. "-Dx=y")
 # - SPARK_SHUFFLE_OPTS, to set config properties only for the external shuffle service (e.g. "-Dx=y")
 # - SPARK_DAEMON_JAVA_OPTS, to set config properties for all daemons (e.g. "-Dx=y")
diff --git a/docs/monitoring.md b/docs/monitoring.md
index bcf885fe4e681669d9d12e4ad4b114a407f52a8c..cedceb29580233d697f13159f1107a636af399ff 100644
--- a/docs/monitoring.md
+++ b/docs/monitoring.md
@@ -48,7 +48,7 @@ follows:
   <tr><th style="width:21%">Environment Variable</th><th>Meaning</th></tr>
   <tr>
     <td><code>SPARK_DAEMON_MEMORY</code></td>
-    <td>Memory to allocate to the history server (default: 512m).</td>
+    <td>Memory to allocate to the history server (default: 1g).</td>
   </tr>
   <tr>
     <td><code>SPARK_DAEMON_JAVA_OPTS</code></td>
diff --git a/docs/spark-standalone.md b/docs/spark-standalone.md
index 4f71fbc086cd03fd1966755627d959ecc04475a7..2fe9ec3542b28c18dffa4b11f3a9211b9aa9bb6e 100644
--- a/docs/spark-standalone.md
+++ b/docs/spark-standalone.md
@@ -152,7 +152,7 @@ You can optionally configure the cluster further by setting environment variable
   </tr>
   <tr>
     <td><code>SPARK_DAEMON_MEMORY</code></td>
-    <td>Memory to allocate to the Spark master and worker daemons themselves (default: 512m).</td>
+    <td>Memory to allocate to the Spark master and worker daemons themselves (default: 1g).</td>
   </tr>
   <tr>
     <td><code>SPARK_DAEMON_JAVA_OPTS</code></td>