diff --git a/jstorm-core/src/main/java/com/alibaba/jstorm/daemon/supervisor/Heartbeat.java b/jstorm-core/src/main/java/com/alibaba/jstorm/daemon/supervisor/Heartbeat.java
index 9a8572f5e..e00d7b434 100644
--- a/jstorm-core/src/main/java/com/alibaba/jstorm/daemon/supervisor/Heartbeat.java
+++ b/jstorm-core/src/main/java/com/alibaba/jstorm/daemon/supervisor/Heartbeat.java
@@ -202,7 +202,7 @@ private List<Integer> calculatorAvailablePorts() {
         if (cpuUsage <= 0.0 || !ConfigExtension.isSupervisorEnableAutoAdjustSlots(conf)) {
             return defaultPortList;
         }
-        long freeMemory = JStormUtils.getFreePhysicalMem() * 1024L;
+        long freeMemory = JStormUtils.getAvailablePhysicalMem() * 1024L;
 
         long reserveMemory = ConfigExtension.getStormMachineReserveMem(conf);
 
diff --git a/jstorm-core/src/main/java/com/alibaba/jstorm/utils/JStormUtils.java b/jstorm-core/src/main/java/com/alibaba/jstorm/utils/JStormUtils.java
index fbde4ae25..5d4ffb1c6 100644
--- a/jstorm-core/src/main/java/com/alibaba/jstorm/utils/JStormUtils.java
+++ b/jstorm-core/src/main/java/com/alibaba/jstorm/utils/JStormUtils.java
@@ -518,6 +518,10 @@ public static Long getFreePhysicalMem() {
         return LinuxResource.getFreePhysicalMem();
     }
 
+    public static Long getAvailablePhysicalMem() {
+        return LinuxResource.getAvailablePhysicalMem();
+    }
+
     public static int getNumProcessors() {
         return LinuxResource.getProcessNum();
     }
diff --git a/jstorm-core/src/main/java/com/alibaba/jstorm/utils/LinuxResource.java b/jstorm-core/src/main/java/com/alibaba/jstorm/utils/LinuxResource.java
index 36f20b713..f118d00bb 100644
--- a/jstorm-core/src/main/java/com/alibaba/jstorm/utils/LinuxResource.java
+++ b/jstorm-core/src/main/java/com/alibaba/jstorm/utils/LinuxResource.java
@@ -5,6 +5,7 @@
 import com.google.common.base.Predicate;
 import com.google.common.collect.Iterables;
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -26,6 +27,7 @@ public class LinuxResource {
     private static final Pattern CPU_TIME_FORMAT = Pattern.compile("^cpu[ \t]+([0-9]+)[ \t]+([0-9]+)[ \t]+([0-9]+)");
 
     private static final String PROCFS_MEMINFO = "/proc/meminfo";
+    private static final String MEMINFO_MEMAVAILABLE = "MemAvailable";
     public static final long JIFFY_LENGTH_IN_MILLIS;
     static {
         long jiffiesPerSecond = getJiffies();
@@ -185,7 +187,23 @@ public static Long getFreePhysicalMem() {
         }
         return 0L;
     }
+    public static Long getAvailablePhysicalMem() {
+        if (!OSInfo.isLinux()) {
+            return 0L;
+        }
+        try {
 
+            List<String> lines = IOUtils.readLines(new FileInputStream(PROCFS_MEMINFO));
+            String free = lines.get(2).split("\\s+")[1];
+            if( StringUtils.indexOfIgnoreCase(lines.get(2), MEMINFO_MEMAVAILABLE) < 0 ){
+                free = lines.get(1).split("\\s+")[1];
+            }
+            return Long.valueOf(free);
+        } catch (Exception ignored) {
+            LOG.warn("failed to get total free memory.");
+        }
+        return 0L;
+    }
     /**
      * calcute the disk usage at current filesystem
      * @return