Chunk batch inserts to avoid Postgres parameter limit, add ANALYZE migration

lib/microwaveprop/weather.ex

@@ -211,19 +211,26 @@ defmodule Microwaveprop.Weather do
   def upsert_hrrr_profiles_batch(profiles) do
     now = DateTime.truncate(DateTime.utc_now(), :second)
 
-    entries =
-      Enum.map(profiles, fn attrs ->
-        Map.merge(attrs, %{
-          id: Ecto.UUID.generate(),
-          inserted_at: now,
-          updated_at: now
-        })
-      end)
+    profiles
+    |> Enum.chunk_every(500)
+    |> Enum.reduce({0, nil}, fn chunk, {total_count, _} ->
+      entries =
+        Enum.map(chunk, fn attrs ->
+          Map.merge(attrs, %{
+            id: Ecto.UUID.generate(),
+            inserted_at: now,
+            updated_at: now
+          })
+        end)
 
-    Repo.insert_all(HrrrProfile, entries,
-      on_conflict: {:replace_all_except, [:id, :inserted_at]},
-      conflict_target: [:lat, :lon, :valid_time]
-    )
+      {count, rows} =
+        Repo.insert_all(HrrrProfile, entries,
+          on_conflict: {:replace_all_except, [:id, :inserted_at]},
+          conflict_target: [:lat, :lon, :valid_time]
+        )
+
+      {total_count + count, rows}
+    end)
   end
 
   def has_hrrr_profile?(lat, lon, valid_time) do

priv/repo/migrations/20260403142241_analyze_all_tables.exs

@@ -0,0 +1,9 @@
+defmodule Microwaveprop.Repo.Migrations.AnalyzeAllTables do
+  use Ecto.Migration
+
+  def up do
+    execute "ANALYZE"
+  end
+
+  def down, do: :ok
+end