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
@@ -80,6 +80,11 @@
     "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<size_t> IdleTimeoutSeconds(
+    "idle-timeout", llvm::cl::init(8 * 60),
+    llvm::cl::desc("Maximum time a channel may stay idle until server closes "
+                   "the connection, in seconds. Defaults to 480."));
+
 static Key<grpc::ServerContext *> CurrentRequest;
 
 class RemoteIndexServer final : public v1::SymbolIndex::Service {
@@ -311,6 +316,8 @@
   grpc::ServerBuilder Builder;
   Builder.AddListeningPort(ServerAddress.str(),
                            grpc::InsecureServerCredentials());
+  Builder.AddChannelArgument(GRPC_ARG_MAX_CONNECTION_IDLE_MS,
+                             IdleTimeoutSeconds * 1000);
   Builder.RegisterService(&Service);
   std::unique_ptr<grpc::Server> Server(Builder.BuildAndStart());
   log("Server listening on {0}", ServerAddress);