diff --git a/vm-image-spec.yaml b/vm-image-spec.yaml
index 99164645a730..aee941b3aad4 100644
--- a/vm-image-spec.yaml
+++ b/vm-image-spec.yaml
@@ -236,13 +236,17 @@ files:
         query: |
           select sum(pg_database_size(datname)) as total from pg_database;
 
+      # TEMPORARY - only to help with making data available via internal metrics while testing.
       - metric_name: lfc_approximate_working_set_size
         type: gauge
         help: 'Approximate working set size in pages of 8192 bytes'
-        key_labels:
-        values: [approximate_working_set_size]
+        key_labels: [duration]
+        values: [size]
         query: |
-          select neon.approximate_working_set_size(false) as approximate_working_set_size;
+          select
+            x as duration, neon.approximate_working_set_size_seconds(extract('epoch' from x::interval)::int) as size
+          from
+            (values ('15s'),('30s'),('1m'),('5m'),('10m'),('30m'),('1h')) as t (x);
 
       - metric_name: current_lsn
         type: gauge
@@ -379,10 +383,13 @@ files:
       - metric_name: lfc_approximate_working_set_size
         type: gauge
         help: 'Approximate working set size in pages of 8192 bytes'
-        key_labels:
-        values: [approximate_working_set_size]
+        key_labels: [duration]
+        values: [size]
         query: |
-          select neon.approximate_working_set_size(false) as approximate_working_set_size;
+          select
+            x as duration, neon.approximate_working_set_size_seconds(extract('epoch' from x::interval)::int) as size
+          from
+            (values ('15s'),('30s'),('1m'),('5m'),('10m'),('30m'),('1h')) as t (x);
 build: |
   # Build cgroup-tools
   #