diff --git a/CHANGELOG.md b/CHANGELOG.md
index fc1a3418b74b97f01f943e9ba9f24baf67e9a5cf..6704da5bcb5ad1ab6e0ea9623f2cc1474200cd12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ Please mark all change in change log and use the issue from GitHub
 -   \#2128 Check has_partition params
 -   \#2131 Distance/ID returned is not correct if searching with duplicate ids
 -   \#2141 Fix server start failed if wal directory exist
+-   \#2169 Fix SingleIndexTest.IVFSQHybrid unittest
 -   \#2196 Fix server start failed if wal is disabled
 
 ## Feature
diff --git a/core/src/index/thirdparty/faiss/InvertedLists.cpp b/core/src/index/thirdparty/faiss/InvertedLists.cpp
index e126081e4538a5b2684513f9f64873379538f35c..93f1ba9bd2b98f45f07df00794743e8539d6e3ba 100644
--- a/core/src/index/thirdparty/faiss/InvertedLists.cpp
+++ b/core/src/index/thirdparty/faiss/InvertedLists.cpp
@@ -31,7 +31,9 @@ namespace faiss {
 PageLockMemory::PageLockMemory(size_t size) : nbytes(size) {
     auto err = cudaHostAlloc(&(this->data), size, 0);
     if (err) {
-        FAISS_THROW_MSG("Fail to alloc page lock memory " + std::to_string(size));
+        std::string msg =
+            "Fail to alloc page lock memory " + std::to_string(size) + ", err code " + std::to_string((int32_t)err);
+        FAISS_THROW_MSG(msg);
     }
 }
 
@@ -42,7 +44,9 @@ PageLockMemory::~PageLockMemory() {
 PageLockMemory::PageLockMemory(const PageLockMemory& other) {
     auto err = cudaHostAlloc(&(this->data), other.nbytes, 0);
     if (err) {
-        FAISS_THROW_MSG("Fail to alloc page lock memory " + std::to_string(other.nbytes));
+        std::string msg = "Fail to alloc page lock memory " + std::to_string(other.nbytes) + ", err code " +
+                          std::to_string((int32_t)err);
+        FAISS_THROW_MSG(msg);
     }
     memcpy(this->data, other.data, other.nbytes);
     this->nbytes = other.nbytes;
diff --git a/core/src/index/unittest/test_customized_index.cpp b/core/src/index/unittest/test_customized_index.cpp
index f41de356a816e1e681caa61996ed0c2622a30e24..fa610915cecedf093e91981f2d861aedf6aad8d6 100644
--- a/core/src/index/unittest/test_customized_index.cpp
+++ b/core/src/index/unittest/test_customized_index.cpp
@@ -24,7 +24,7 @@ class SingleIndexTest : public DataGen, public TestGpuIndexBase {
     void
     SetUp() override {
         TestGpuIndexBase::SetUp();
-        nb = 1000000;
+        nb = 100000;
         nq = 1000;
         dim = DIM;
         Generate(dim, nb, nq);