Reduce default memory gain limit from 10% to 8%

3 files changed, 7 insertions, 6 deletions

diff --git a/config-model/src/main/java/com/yahoo/vespa/model/search/NodeResourcesTuning.java b/config-model/src/main/java/com/yahoo/vespa/model/search/NodeResourcesTuning.java
index 0eb0bd0bf2d..b3de53c2344 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/search/NodeResourcesTuning.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/search/NodeResourcesTuning.java
@@ -16,7 +16,7 @@ public class NodeResourcesTuning implements ProtonConfig.Producer {
 
     private final static double SUMMARY_FILE_SIZE_AS_FRACTION_OF_MEMORY = 0.02;
     private final static double SUMMARY_CACHE_SIZE_AS_FRACTION_OF_MEMORY = 0.05;
-    private final static double MEMORY_GAIN_AS_FRACTION_OF_MEMORY = 0.10;
+    private final static double MEMORY_GAIN_AS_FRACTION_OF_MEMORY = 0.08;
     final static long MB = 1024 * 1024;
     public final static long GB = MB * 1024;
     // This is an approximate number base on observation of a node using 33G memory with 765M docs
diff --git a/config-model/src/test/java/com/yahoo/config/model/provision/ModelProvisioningTest.java b/config-model/src/test/java/com/yahoo/config/model/provision/ModelProvisioningTest.java
index 2447709f778..10f883bdc75 100644
--- a/config-model/src/test/java/com/yahoo/config/model/provision/ModelProvisioningTest.java
+++ b/config-model/src/test/java/com/yahoo/config/model/provision/ModelProvisioningTest.java
@@ -2166,7 +2166,7 @@ public class ModelProvisioningTest {
         ProtonConfig cfg = getProtonConfig(model, cluster.getSearchNodes().get(0).getConfigId());
         assertEquals(2000, cfg.flush().memory().maxtlssize()); // from config override
         assertEquals(1000, cfg.flush().memory().maxmemory()); // from explicit tuning
-        assertEquals((long) ((128 - reservedMemoryGb) * GB * 0.10), cfg.flush().memory().each().maxmemory()); // from default node flavor tuning
+        assertEquals((long) ((128 - reservedMemoryGb) * GB * 0.08), cfg.flush().memory().each().maxmemory()); // from default node flavor tuning
     }
 
     private static ProtonConfig getProtonConfig(VespaModel model, String configId) {
diff --git a/config-model/src/test/java/com/yahoo/vespa/model/search/NodeResourcesTuningTest.java b/config-model/src/test/java/com/yahoo/vespa/model/search/NodeResourcesTuningTest.java
index 9a6a7458766..03b49c9303d 100644
--- a/config-model/src/test/java/com/yahoo/vespa/model/search/NodeResourcesTuningTest.java
+++ b/config-model/src/test/java/com/yahoo/vespa/model/search/NodeResourcesTuningTest.java
@@ -23,6 +23,7 @@ public class NodeResourcesTuningTest {
 
     private static final double delta = 0.00001;
     private static final double combinedFactor = 1 - 18.0/100;
+    private static final double DEFAULT_MEMORY_GAIN = 0.08;
 
     @Test
     public void require_that_hwinfo_disk_size_is_set() {
@@ -125,10 +126,10 @@ public class NodeResourcesTuningTest {
 
     @Test
     public void require_that_flush_strategy_memory_limits_are_set_based_on_available_memory() {
-        assertFlushStrategyMemory((long)(4 * GB * 0.10), 4);
-        assertFlushStrategyMemory((long)(8 * GB * 0.10), 8);
-        assertFlushStrategyMemory((long)(24 * GB * 0.10), 24);
-        assertFlushStrategyMemory((long)(64 * GB * 0.10), 64);
+        assertFlushStrategyMemory((long)(4 * GB * DEFAULT_MEMORY_GAIN), 4);
+        assertFlushStrategyMemory((long)(8 * GB * DEFAULT_MEMORY_GAIN), 8);
+        assertFlushStrategyMemory((long)(24 * GB * DEFAULT_MEMORY_GAIN), 24);
+        assertFlushStrategyMemory((long)(64 * GB * DEFAULT_MEMORY_GAIN), 64);
     }
 
     @Test