Add feature flags for dynamic persistence throttling window size tuning

Added flags:

 * Window size decrement factor (default 1.2)
 * Window size backoff (default 0.95)

1 files changed, 6 insertions, 0 deletions

diff --git a/configserver/src/main/java/com/yahoo/vespa/config/server/deploy/ModelContextImpl.java b/configserver/src/main/java/com/yahoo/vespa/config/server/deploy/ModelContextImpl.java
index 89d3318d710..bc0f66d933c 100644
--- a/configserver/src/main/java/com/yahoo/vespa/config/server/deploy/ModelContextImpl.java
+++ b/configserver/src/main/java/com/yahoo/vespa/config/server/deploy/ModelContextImpl.java
@@ -202,6 +202,8 @@ public class ModelContextImpl implements ModelContext {
         private final boolean enableServerOcspStapling;
         private final String persistenceAsyncThrottling;
         private final String mergeThrottlingPolicy;
+        private final double persistenceThrottlingWsDecrementFactor;
+        private final double persistenceThrottlingWsBackoff;
         private final boolean useQrserverServiceName;
 
         public FeatureFlags(FlagSource source, ApplicationId appId) {
@@ -243,6 +245,8 @@ public class ModelContextImpl implements ModelContext {
             this.enableServerOcspStapling = flagValue(source, appId, Flags.ENABLE_SERVER_OCSP_STAPLING);
             this.persistenceAsyncThrottling = flagValue(source, appId, Flags.PERSISTENCE_ASYNC_THROTTLING);
             this.mergeThrottlingPolicy = flagValue(source, appId, Flags.MERGE_THROTTLING_POLICY);
+            this.persistenceThrottlingWsDecrementFactor = flagValue(source, appId, Flags.PERSISTENCE_THROTTLING_WS_DECREMENT_FACTOR);
+            this.persistenceThrottlingWsBackoff = flagValue(source, appId, Flags.PERSISTENCE_THROTTLING_WS_BACKOFF);
             this.useQrserverServiceName =  flagValue(source, appId, Flags.USE_QRSERVER_SERVICE_NAME);
         }
 
@@ -286,6 +290,8 @@ public class ModelContextImpl implements ModelContext {
         @Override public boolean enableServerOcspStapling() { return enableServerOcspStapling; }
         @Override public String persistenceAsyncThrottling() { return persistenceAsyncThrottling; }
         @Override public String mergeThrottlingPolicy() { return mergeThrottlingPolicy; }
+        @Override public double persistenceThrottlingWsDecrementFactor() { return persistenceThrottlingWsDecrementFactor; }
+        @Override public double persistenceThrottlingWsBackoff() { return persistenceThrottlingWsBackoff; }
         @Override public boolean useQrserverServiceName() { return useQrserverServiceName; }
 
         private static <V> V flagValue(FlagSource source, ApplicationId appId, UnboundFlag<? extends V, ?, ?> flag) {