neonvm: add LFC approximate working set size to metrics (#7252)

ref neondatabase/autoscaling#878 ref neondatabase/autoscaling#872 Add `approximate_working_set_size` to sql exporter so that autoscaling can use it in the future. --------- Signed-off-by: Alex Chi Z <chi@neon.tech> Co-authored-by: Peter Bendel <peterbendel@neon.tech>
neondatabase · Mar 29, 2024 · 7ddc7b4 · 7ddc7b4 · github-actions · Mar 29, 2024
1 parent 63213fc
commit 7ddc7b4
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/vm-image-spec.yaml b/vm-image-spec.yaml
@@ -187,6 +187,14 @@ files:
         query: |
           select sum(pg_database_size(datname)) as total from pg_database;
 
+      - 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]
+        query: |
+          select neon.approximate_working_set_size(false) as approximate_working_set_size;
+
 build: |
   # Build cgroup-tools
   #