diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 4013957026..f46226da3c 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -236,7 +236,7 @@ if(${BUILD_WITH_ROCKSDB})
     endif(${TD_WINDOWS})
 
 
-    if(${TD_DARWIN} OR ${TD_WINDOWS})
+    if(${TD_DARWIN})
         option(HAVE_THREAD_LOCAL "" OFF)
         option(WITH_IOSTATS_CONTEXT "" OFF)
         option(WITH_PERF_CONTEXT "" OFF)
@@ -247,6 +247,7 @@ if(${BUILD_WITH_ROCKSDB})
     endif(${TD_WINDOWS})
     
     
+    option(WITH_FALLOCATE "" OFF)
     option(WITH_JEMALLOC "" OFF)
     option(WITH_GFLAGS "" OFF)
     option(PORTABLE "" ON)
diff --git a/source/libs/stream/src/streamStateRocksdb.c b/source/libs/stream/src/streamStateRocksdb.c
index 162d10f9de..9c0f81894d 100644
--- a/source/libs/stream/src/streamStateRocksdb.c
+++ b/source/libs/stream/src/streamStateRocksdb.c
@@ -390,7 +390,7 @@ int streamInitBackend(SStreamState* pState, char* path) {
   //   create the DB if it's not already present
   rocksdb_options_set_create_if_missing(opts, 1);
   rocksdb_options_set_create_missing_column_families(opts, 1);
-  rocksdb_options_set_write_buffer_size(opts, 128 << 20);
+  rocksdb_options_set_write_buffer_size(opts, 64 << 20);
   rocksdb_options_set_recycle_log_file_num(opts, 6);
   rocksdb_options_set_max_write_buffer_number(opts, 3);