diff --git a/hugegraph-dist/src/assembly/static/conf/hugegraph.properties b/hugegraph-dist/src/assembly/static/conf/hugegraph.properties
index 5a83ffd30b..0a5c7803e6 100644
--- a/hugegraph-dist/src/assembly/static/conf/hugegraph.properties
+++ b/hugegraph-dist/src/assembly/static/conf/hugegraph.properties
@@ -2,9 +2,14 @@
 gremlin.graph=com.baidu.hugegraph.HugeFactory
 
 # cache config
-#schema.cache_capacity=1048576
-#graph.cache_capacity=10485760
-#graph.cache_expire=600
+#schema.cache_capacity=100000
+# vertex-cache default is 1000w, 10min expired
+#vertex.cache_capacity=10000000
+#vertex.cache_expire=600
+# edge-cache default is 100w, 10min expired
+#edge.cache_capacity=1000000
+#edge.cache_expire=600
+
 
 # schema illegal name template
 #schema.illegal_name_regex=\s+|~.*
@@ -31,6 +36,11 @@ cassandra.password=
 #cassandra.keyspace.strategy=SimpleStrategy
 #cassandra.keyspace.replication=3
 
+# hbase backend config
+#hbase.hosts=localhost
+#hbase.port=2181
+#hbase.znode_parent=/hbsae
+#hbase.threads_max=64
 
 # mysql backend config
 #jdbc.driver=com.mysql.jdbc.Driver
@@ -39,7 +49,7 @@ cassandra.password=
 #jdbc.password=
 #jdbc.reconnect_max_times=3
 #jdbc.reconnect_interval=3
-#jdbc.sslmode=disable
+#jdbc.sslmode=false
 
 # palo backend config
 #palo.host=127.0.0.1
diff --git a/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlOptions.java b/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlOptions.java
index 7f5ddeffbd..a4b40b72db 100644
--- a/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlOptions.java
+++ b/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlOptions.java
@@ -90,12 +90,12 @@ public static synchronized MysqlOptions instance() {
                     3
             );
 
-    public static final ConfigOption<String> SSL_MODE =
+    public static final ConfigOption<String> JDBC_SSL_MODE =
             new ConfigOption<>(
                     "jdbc.ssl_mode",
                     "The SSL mode of connections with database.",
                     disallowEmpty(),
-                    "disable"
+                    "false"
             );
 
     public static final ConfigOption<String> STORAGE_ENGINE =
diff --git a/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlSessions.java b/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlSessions.java
index 05343b0cf5..c8a2c19ca6 100644
--- a/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlSessions.java
+++ b/hugegraph-mysql/src/main/java/com/baidu/hugegraph/backend/store/mysql/MysqlSessions.java
@@ -97,9 +97,11 @@ private Connection open(boolean autoReconnect) throws SQLException {
 
         int maxTimes = this.config.get(MysqlOptions.JDBC_RECONNECT_MAX_TIMES);
         int interval = this.config.get(MysqlOptions.JDBC_RECONNECT_INTERVAL);
+        String sslMode = this.config.get(MysqlOptions.JDBC_SSL_MODE);
 
         URIBuilder uriBuilder = this.newConnectionURIBuilder();
         uriBuilder.setPath(url)
+                  .setParameter("useSSL", sslMode)
                   .setParameter("characterEncoding", "utf-8")
                   .setParameter("rewriteBatchedStatements", "true")
                   .setParameter("useServerPrepStmts", "false")