diff --git a/internal/core/src/index/TextMatchIndex.h b/internal/core/src/index/TextMatchIndex.h
index ae894d7b7d..59d725e1f3 100644
--- a/internal/core/src/index/TextMatchIndex.h
+++ b/internal/core/src/index/TextMatchIndex.h
@@ -101,19 +101,26 @@ class TextMatchIndex : public InvertedIndexTantivy<std::string> {
 class TextMatchIndexHolder {
  public:
     explicit TextMatchIndexHolder(
-        std::unique_ptr<milvus::index::TextMatchIndex> index)
-        : index_(std::move(index)), size_(index_ ? index_->ByteSize() : 0) {
-        if (size_ > 0) {
-            milvus::cachinglayer::Manager::GetInstance().ChargeLoadedResource(
-                {size_, 0});
-        }
+        std::unique_ptr<milvus::index::TextMatchIndex> index, bool mmap_enabled)
+        : index_(std::move(index)), loaded_size_([&]() {
+              if (!index_) {
+                  return milvus::cachinglayer::ResourceUsage(0, 0);
+              }
+              if (mmap_enabled) {
+                  return milvus::cachinglayer::ResourceUsage(
+                      0, index_->ByteSize());
+              } else {
+                  return milvus::cachinglayer::ResourceUsage(index_->ByteSize(),
+                                                             0);
+              }
+          }()) {
+        milvus::cachinglayer::Manager::GetInstance().ChargeLoadedResource(
+            loaded_size_);
     }
 
     ~TextMatchIndexHolder() {
-        if (size_ > 0) {
-            milvus::cachinglayer::Manager::GetInstance().RefundLoadedResource(
-                {size_, 0});
-        }
+        milvus::cachinglayer::Manager::GetInstance().RefundLoadedResource(
+            loaded_size_);
     }
 
     milvus::index::TextMatchIndex*
@@ -123,7 +130,7 @@ class TextMatchIndexHolder {
 
  private:
     std::unique_ptr<milvus::index::TextMatchIndex> index_;
-    int64_t size_;
+    const milvus::cachinglayer::ResourceUsage loaded_size_;
 };
 
 }  // namespace milvus::index
diff --git a/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp b/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
index d2a5b39ecf..05206524dd 100644
--- a/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
+++ b/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
@@ -1739,8 +1739,8 @@ ChunkedSegmentSealedImpl::CreateTextIndex(FieldId field_id) {
     index->RegisterTokenizer("milvus_tokenizer",
                              field_meta.get_analyzer_params().c_str());
 
-    text_indexes_[field_id] =
-        std::make_shared<index::TextMatchIndexHolder>(std::move(index));
+    text_indexes_[field_id] = std::make_shared<index::TextMatchIndexHolder>(
+        std::move(index), cfg.GetScalarIndexEnableMmap());
 }
 
 void
diff --git a/internal/core/src/segcore/storagev1translator/TextMatchIndexTranslator.cpp b/internal/core/src/segcore/storagev1translator/TextMatchIndexTranslator.cpp
index 7f2380c9b2..f41fc40219 100644
--- a/internal/core/src/segcore/storagev1translator/TextMatchIndexTranslator.cpp
+++ b/internal/core/src/segcore/storagev1translator/TextMatchIndexTranslator.cpp
@@ -41,7 +41,7 @@ TextMatchIndexTranslator::TextMatchIndexTranslator(
                                              /* is_index */ true),
             milvus::segcore::getCacheWarmupPolicy(/* is_vector */ false,
                                                   /* is_index */ true),
-            /* support_eviction */ false) {
+            /* support_eviction */ true) {
 }
 
 size_t
@@ -59,7 +59,16 @@ std::pair<milvus::cachinglayer::ResourceUsage,
 TextMatchIndexTranslator::estimated_byte_size_of_cell(
     milvus::cachinglayer::cid_t) const {
     // ignore the cid checking, because there is only one cell
-    return {{load_info_.index_size, 0}, {2 * load_info_.index_size, 0}};
+    if (load_info_.enable_mmap) {
+        return {{0, load_info_.index_size},
+                {load_info_.index_size, load_info_.index_size}};
+    } else {
+        // The reason the maximum disk usage is not zero is that the text match index
+        // is first written to the disk, then loaded into memory. Only after that are
+        // the disk files deleted.
+        return {{load_info_.index_size, 0},
+                {load_info_.index_size, load_info_.index_size}};
+    }
 }
 
 int64_t
@@ -98,7 +107,11 @@ TextMatchIndexTranslator::get_cells(
              load_info_.field_id,
              load_info_.segment_id);
 
-    index->SetCellSize({index->ByteSize(), 0});
+    if (load_info_.enable_mmap) {
+        index->SetCellSize({0, index->ByteSize()});
+    } else {
+        index->SetCellSize({index->ByteSize(), 0});
+    }
 
     std::vector<std::pair<milvus::cachinglayer::cid_t,
                           std::unique_ptr<milvus::index::TextMatchIndex>>>