diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryManager.java
index b435df3cf53..37dc16c9b6e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryManager.java
@@ -265,10 +265,11 @@ public class HeapMemoryManager {
     }
 
     private void tune() {
-      evictCount = blockCache.getStats().getEvictedCount() - evictCount;
+      long curEvictCount = blockCache.getStats().getEvictedCount();
+      tunerContext.setEvictCount(curEvictCount - evictCount);
+      evictCount = curEvictCount;
       tunerContext.setBlockedFlushCount(blockedFlushCount.getAndSet(0));
       tunerContext.setUnblockedFlushCount(unblockedFlushCount.getAndSet(0));
-      tunerContext.setEvictCount(evictCount);
       tunerContext.setCurBlockCacheSize(blockCachePercent);
       tunerContext.setCurMemStoreSize(globalMemStorePercent);
       TunerResult result = null;