Try MDB_MAPASYNC

crates/index-scheduler/src/index_mapper/index_map.rs

@@ -305,7 +305,7 @@ fn create_or_open_index(
     options.map_size(clamp_to_page_size(map_size));
     options.max_readers(1024);
     if enable_mdb_writemap {
-        unsafe { options.flags(EnvFlags::WRITE_MAP) };
+        unsafe { options.flags(EnvFlags::WRITE_MAP | EnvFlags::MAP_ASYNC) };
     }
 
     if let Some((created, updated)) = date {

workloads/movies-writemap.json

@@ -0,0 +1,42 @@
+{
+  "name": "movies.json,usewritemap",
+  "run_count": 10,
+  "extra_cli_args": ["--experimental-reduce-indexing-memory-usage"],
+  "assets": {
+    "movies.json": {
+      "local_location": null,
+      "remote_location": "https://milli-benchmarks.fra1.digitaloceanspaces.com/bench/datasets/movies.json",
+      "sha256": "5b6e4cb660bc20327776e8a33ea197b43d9ec84856710ead1cc87ab24df77de1"
+    }
+  },
+  "commands": [
+    {
+      "route": "indexes/movies/settings",
+      "method": "PATCH",
+      "body": {
+        "inline": {
+          "searchableAttributes": [
+            "title",
+            "overview"
+          ],
+          "filterableAttributes": [
+            "genres",
+            "release_date"
+          ],
+          "sortableAttributes": [
+            "release_date"
+          ]
+        }
+      },
+      "synchronous": "DontWait"
+    },
+    {
+      "route": "indexes/movies/documents",
+      "method": "POST",
+      "body": {
+        "asset": "movies.json"
+      },
+      "synchronous": "WaitForTask"
+    }
+  ]
+}