From 93228103df1372da1137a875dadc107750423ec4 Mon Sep 17 00:00:00 2001
From: TAK LON WU <wutaklon@amazon.com>
Date: Fri, 3 May 2019 15:21:33 -0700
Subject: [PATCH] HBASE-21777 Only log compaction pressure throughput when
 changed or traced

---
 .../PressureAwareCompactionThroughputController.java     | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/throttle/PressureAwareCompactionThroughputController.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/throttle/PressureAwareCompactionThroughputController.java
index c0d3b74b1c0d..7df07bb27dbd 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/throttle/PressureAwareCompactionThroughputController.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/throttle/PressureAwareCompactionThroughputController.java
@@ -100,8 +100,13 @@ private void tune(double compactionPressure) {
               * compactionPressure;
     }
     if (LOG.isDebugEnabled()) {
-      LOG.debug("compactionPressure is " + compactionPressure + ", tune compaction throughput to "
-          + throughputDesc(maxThroughputToSet));
+      if (maxThroughputToSet != getMaxThroughput()) {
+        LOG.debug("CompactionPressure is " + compactionPressure + ", tune throughput to "
+            + throughputDesc(maxThroughputToSet));
+      } else if (LOG.isTraceEnabled()) {
+        LOG.trace("CompactionPressure is " + compactionPressure + ", keep throughput throttling to "
+            + throughputDesc(maxThroughputToSet));
+      }
     }
     this.setMaxThroughput(maxThroughputToSet);
   }