diff --git a/clang-tools-extra/clangd/index/Background.cpp b/clang-tools-extra/clangd/index/Background.cpp
--- a/clang-tools-extra/clangd/index/Background.cpp
+++ b/clang-tools-extra/clangd/index/Background.cpp
@@ -416,7 +416,7 @@
 }
 
 void BackgroundIndex::profile(MemoryTree &MT) const {
-  IndexedSymbols.profile(MT.child("symbols"));
+  IndexedSymbols.profile(MT.child("slabs"));
   // We don't want to mix memory used by index and symbols, so call base class.
   MT.child("index").addUsage(SwapIndex::estimateMemoryUsage());
 }
diff --git a/clang-tools-extra/clangd/index/FileIndex.cpp b/clang-tools-extra/clangd/index/FileIndex.cpp
--- a/clang-tools-extra/clangd/index/FileIndex.cpp
+++ b/clang-tools-extra/clangd/index/FileIndex.cpp
@@ -478,11 +478,11 @@
 }
 
 void FileIndex::profile(MemoryTree &MT) const {
-  PreambleSymbols.profile(MT.child("preamble").child("symbols"));
+  PreambleSymbols.profile(MT.child("preamble").child("slabs"));
   MT.child("preamble")
       .child("index")
       .addUsage(PreambleIndex.estimateMemoryUsage());
-  MainFileSymbols.profile(MT.child("main_file").child("symbols"));
+  MainFileSymbols.profile(MT.child("main_file").child("slabs"));
   MT.child("main_file")
       .child("index")
       .addUsage(MainFileIndex.estimateMemoryUsage());
diff --git a/clang-tools-extra/clangd/test/memory_tree.test b/clang-tools-extra/clangd/test/memory_tree.test
--- a/clang-tools-extra/clangd/test/memory_tree.test
+++ b/clang-tools-extra/clangd/test/memory_tree.test
@@ -22,7 +22,7 @@
 # CHECK-NEXT:             "_self": {{[0-9]+}},
 # CHECK-NEXT:             "_total": {{[0-9]+}}
 # CHECK-NEXT:           },
-# CHECK-NEXT:           "symbols": {
+# CHECK-NEXT:           "slabs": {
 # CHECK-NEXT:             "{{.*}}main.cpp": {
 # CHECK-NEXT:               "_self": {{[0-9]+}},
 # CHECK-NEXT:               "_total": {{[0-9]+}},
@@ -50,7 +50,7 @@
 # CHECK-NEXT:             "_self": {{[0-9]+}},
 # CHECK-NEXT:             "_total": {{[0-9]+}}
 # CHECK-NEXT:           },
-# CHECK-NEXT:           "symbols": {
+# CHECK-NEXT:           "slabs": {
 # CHECK-NEXT:             "_self": {{[0-9]+}},
 # CHECK-NEXT:             "_total": {{[0-9]+}}
 # CHECK-NEXT:           }
diff --git a/clang-tools-extra/clangd/unittests/BackgroundIndexTests.cpp b/clang-tools-extra/clangd/unittests/BackgroundIndexTests.cpp
--- a/clang-tools-extra/clangd/unittests/BackgroundIndexTests.cpp
+++ b/clang-tools-extra/clangd/unittests/BackgroundIndexTests.cpp
@@ -927,7 +927,7 @@
   MemoryTree MT(&Alloc);
   Idx.profile(MT);
   ASSERT_THAT(MT.children(),
-              UnorderedElementsAre(Pair("symbols", _), Pair("index", _)));
+              UnorderedElementsAre(Pair("slabs", _), Pair("index", _)));
 }
 
 } // namespace clangd
diff --git a/clang-tools-extra/clangd/unittests/FileIndexTests.cpp b/clang-tools-extra/clangd/unittests/FileIndexTests.cpp
--- a/clang-tools-extra/clangd/unittests/FileIndexTests.cpp
+++ b/clang-tools-extra/clangd/unittests/FileIndexTests.cpp
@@ -672,9 +672,9 @@
               UnorderedElementsAre(Pair("preamble", _), Pair("main_file", _)));
 
   ASSERT_THAT(MT.child("preamble").children(),
-              UnorderedElementsAre(Pair("index", _), Pair("symbols", _)));
+              UnorderedElementsAre(Pair("index", _), Pair("slabs", _)));
   ASSERT_THAT(MT.child("main_file").children(),
-              UnorderedElementsAre(Pair("index", _), Pair("symbols", _)));
+              UnorderedElementsAre(Pair("index", _), Pair("slabs", _)));
 
   ASSERT_THAT(MT.child("preamble").child("index").total(), Gt(0U));
   ASSERT_THAT(MT.child("main_file").child("index").total(), Gt(0U));