diff --git a/filament/src/RenderPass.cpp b/filament/src/RenderPass.cpp
index 72614612ee..113e53e855 100644
--- a/filament/src/RenderPass.cpp
+++ b/filament/src/RenderPass.cpp
@@ -901,6 +901,10 @@ void RenderPass::Executor::execute(FEngine const& engine, DriverApi& driver,
     size_t const capacity = engine.getMinCommandBufferSize();
     CircularBuffer const& circularBuffer = driver.getCircularBuffer();
 
+    utils::slog.e <<"circularBuffer: " << circularBuffer.size() << " used: " <<
+        circularBuffer.getUsed() <<
+        " commandCount: " << last - first << utils::io::endl;
+
     // b/479079631: Log the number of commands in this render pass.
     size_t const commandCount = last - first;
     if (Platform* platform = engine.getPlatform(); platform->hasDebugUpdateStatFunc()) {
diff --git a/filament/src/details/Engine.cpp b/filament/src/details/Engine.cpp
index 4010eb30db..fdeca7ee33 100644
--- a/filament/src/details/Engine.cpp
+++ b/filament/src/details/Engine.cpp
@@ -264,8 +264,9 @@ FEngine::FEngine(Builder const& builder) :
         mLightManager(*this),
         mCameraManager(*this),
         mCommandBufferQueue(
+               builder->mConfig.minCommandBufferSizeMB * MiB,
                 builder->mConfig.minCommandBufferSizeMB * MiB,
-                builder->mConfig.commandBufferSizeMB * MiB,
+//                builder->mConfig.commandBufferSizeMB * MiB,
                 builder->mPaused),
         mPerRenderPassArena(
                 "FEngine::mPerRenderPassAllocator",
@@ -277,6 +278,7 @@ FEngine::FEngine(Builder const& builder) :
         mMainThreadId(ThreadUtils::getThreadId()),
         mConfig(builder->mConfig)
 {
+
     // update all the features flags specified in the builder
     for (auto const& [feature, value] : builder->mFeatureFlags) {
         auto* const p = getFeatureFlagPtr(feature.c_str_safe(), true);
@@ -348,7 +350,6 @@ void FEngine::init() {
     LOG(INFO) << "Backend feature level: " << int(driverApi.getFeatureLevel());
     LOG(INFO) << "FEngine feature level: " << int(mActiveFeatureLevel);
 
-
     mResourceAllocatorDisposer = std::make_shared<TextureCacheDisposer>(driverApi);
 
     mFullScreenTriangleVb = downcast(VertexBuffer::Builder()
@@ -744,12 +745,13 @@ void FEngine::prepare(DriverApi& driver) {
                     if (item->getMaterial()->getMaterialDomain() == MaterialDomain::SURFACE) {
                         // If the remaining space is less than half the capacity, we flush right
                         // away to allow some headroom for commands that might come later.
-                        if (UTILS_UNLIKELY(driver.getCircularBuffer().getUsed() > capacity / 2)) {
+                        if (UTILS_UNLIKELY(driver.getCircularBuffer().getUsed() > capacity / 2) && false) {
                             flush();
                         }
                         item->commit(driver, uboManager);
                     }
                 });
+
     }
 
     if (useUboBatching) {
diff --git a/samples/hellopbr.cpp b/samples/hellopbr.cpp
index c5b0af2d4b..5b1dc7f8cf 100644
--- a/samples/hellopbr.cpp
+++ b/samples/hellopbr.cpp
@@ -36,13 +36,20 @@
 #include <iostream>
 #include <string>// for printing usage/help
 
+#include "filament/MaterialInstance.h"
 #include "generated/resources/resources.h"
 #include "generated/resources/monkey.h"
 
+#include <utils/Log.h>
+
 using namespace filament;
 using namespace filamesh;
 using namespace filament::math;
 
+namespace {
+std::vector<MaterialInstance*> instances;
+}
+
 using Backend = Engine::Backend;
 
 struct App {
@@ -152,6 +159,19 @@ int main(int argc, char** argv) {
         auto& tcm = engine->getTransformManager();
         auto ti = tcm.getInstance(app.mesh.renderable);
         tcm.setTransform(ti, app.transform * mat4f::rotation(now, float3{ 0, 1, 0 }));
+
+        static int count = 0;
+        constexpr int allSize = 12000;
+        if (count++ == 5) {
+            for (size_t i = 0; i < allSize; ++i) {
+                auto mi = app.materialInstance = app.material->createInstance();
+                mi->setParameter("baseColor", RgbType::LINEAR, float3{0.8});
+                mi->setParameter("metallic", 1.0f);
+                mi->setParameter("roughness", 0.4f);
+                mi->setParameter("reflectance", 0.5f);
+                instances.push_back(mi);
+            }
+        }
     });
 
     FilamentApp::get().run(app.config, setup, cleanup);