diff --git a/src/cluster.cpp b/src/cluster.cpp
index de8551e0..07c6e1af 100644
--- a/src/cluster.cpp
+++ b/src/cluster.cpp
@@ -243,7 +243,7 @@ void save(Thread* thread, TTEntry* tte,
 
   tte->save(k, v, b, d, m, ev);
 
-  if (d > 5 * ONE_PLY)
+  if (d > 3 * ONE_PLY)
   {
      // Try to add to thread's send buffer
      {
diff --git a/src/cluster.h b/src/cluster.h
index 6648a676..c1470208 100644
--- a/src/cluster.h
+++ b/src/cluster.h
@@ -43,7 +43,7 @@ struct MoveInfo {
 #ifdef USE_MPI
 using KeyedTTEntry = std::pair<Key, TTEntry>;
 
-constexpr std::size_t TTCacheSize = 32;
+constexpr std::size_t TTCacheSize = 16;
 template <std::size_t N> class TTCache : public std::array<KeyedTTEntry, N> {
 
   struct Compare {