diff --git a/clang-tools-extra/clangd/index/remote/server/Server.cpp b/clang-tools-extra/clangd/index/remote/server/Server.cpp
--- a/clang-tools-extra/clangd/index/remote/server/Server.cpp
+++ b/clang-tools-extra/clangd/index/remote/server/Server.cpp
@@ -72,6 +72,13 @@
     "server-address", llvm::cl::init("0.0.0.0:50051"),
     llvm::cl::desc("Address of the invoked server. Defaults to 0.0.0.0:50051"));
 
+llvm::cl::opt<unsigned> HotReloadFrequency{
+    "hot-reload-frequency",
+    llvm::cl::desc("Delay between index hot reload checks (in seconds)"),
+    llvm::cl::init(90),
+    llvm::cl::Hidden,
+};
+
 class RemoteIndexServer final : public v1::SymbolIndex::Service {
 public:
   RemoteIndexServer(clangd::SymbolIndex &Index, llvm::StringRef IndexRoot)
@@ -328,9 +335,9 @@
     return -1;
   }
 
-  std::thread HotReloadThread([&Index, &Status, &FS]() {
+  const auto RefreshFrequency = std::chrono::seconds(HotReloadFrequency);
+  std::thread HotReloadThread([&Index, &Status, &FS, &RefreshFrequency]() {
     llvm::vfs::Status LastStatus = *Status;
-    static constexpr auto RefreshFrequency = std::chrono::seconds(30);
     while (!clang::clangd::shutdownRequested()) {
       hotReload(*Index, llvm::StringRef(IndexPath), LastStatus, FS);
       std::this_thread::sleep_for(RefreshFrequency);
diff --git a/clang-tools-extra/clangd/test/remote-index/pipeline_helper.py b/clang-tools-extra/clangd/test/remote-index/pipeline_helper.py
--- a/clang-tools-extra/clangd/test/remote-index/pipeline_helper.py
+++ b/clang-tools-extra/clangd/test/remote-index/pipeline_helper.py
@@ -32,7 +32,7 @@
 
   index_server_process = subprocess.Popen([
       'clangd-index-server', '--server-address=' + server_address,
-      args.index_file, args.project_root
+      '--hot-reload-frequency=3', args.index_file, args.project_root
   ],
                                           stderr=subprocess.PIPE)