Add config for the alloc grow factor used when allocating buffers in multi-value attributes.

1 files changed, 24 insertions, 11 deletions

diff --git a/searchcommon/src/vespa/searchcommon/common/growstrategy.h b/searchcommon/src/vespa/searchcommon/common/growstrategy.h
index 920e07e99f1..a0431b16d51 100644
--- a/searchcommon/src/vespa/searchcommon/common/growstrategy.h
+++ b/searchcommon/src/vespa/searchcommon/common/growstrategy.h
@@ -12,27 +12,40 @@ private:
     uint32_t _docsInitialCapacity;
     uint32_t _docsGrowPercent;
     uint32_t _docsGrowDelta;
+    float    _multiValueAllocGrowFactor;
 public:
-    GrowStrategy(uint32_t docsInitialCapacity = 1024,
-                 uint32_t docsGrowPercent = 50,
-                 uint32_t docsGrowDelta = 0)
+    GrowStrategy()
+        : GrowStrategy(1024, 50, 0, 0.2)
+    {}
+    GrowStrategy(uint32_t docsInitialCapacity,
+                 uint32_t docsGrowPercent,
+                 uint32_t docsGrowDelta,
+                 float multiValueAllocGrowFactor)
         : _docsInitialCapacity(docsInitialCapacity),
           _docsGrowPercent(docsGrowPercent),
-          _docsGrowDelta(docsGrowDelta)
+          _docsGrowDelta(docsGrowDelta),
+          _multiValueAllocGrowFactor(multiValueAllocGrowFactor)
     {
     }
 
-    uint32_t getDocsInitialCapacity() const { return _docsInitialCapacity; }
-    uint32_t     getDocsGrowPercent() const { return _docsGrowPercent; }
-    uint32_t       getDocsGrowDelta() const { return _docsGrowDelta; }
-    void setDocsInitialCapacity(uint32_t v) { _docsInitialCapacity = v; }
-    void     setDocsGrowPercent(uint32_t v) { _docsGrowPercent = v; }
-    void       setDocsGrowDelta(uint32_t v) { _docsGrowDelta = v; }
+    static GrowStrategy make(uint32_t docsInitialCapacity,
+                             uint32_t docsGrowPercent,
+                             uint32_t docsGrowDelta) {
+        return GrowStrategy(docsInitialCapacity, docsGrowPercent, docsGrowDelta, 0.2);
+    }
+
+    uint32_t    getDocsInitialCapacity() const { return _docsInitialCapacity; }
+    uint32_t        getDocsGrowPercent() const { return _docsGrowPercent; }
+    uint32_t          getDocsGrowDelta() const { return _docsGrowDelta; }
+    float getMultiValueAllocGrowFactor() const { return _multiValueAllocGrowFactor; }
+    void    setDocsInitialCapacity(uint32_t v) { _docsInitialCapacity = v; }
+    void          setDocsGrowDelta(uint32_t v) { _docsGrowDelta = v; }
 
     bool operator==(const GrowStrategy & rhs) const {
         return _docsInitialCapacity == rhs._docsInitialCapacity &&
             _docsGrowPercent == rhs._docsGrowPercent &&
-            _docsGrowDelta == rhs._docsGrowDelta;
+            _docsGrowDelta == rhs._docsGrowDelta &&
+            _multiValueAllocGrowFactor == rhs._multiValueAllocGrowFactor;
     }
     bool operator!=(const GrowStrategy & rhs) const {
         return !(operator==(rhs));