speed up vm trace pages

server/router/docs/swagger.yaml

@@ -871,7 +871,8 @@ paths:
       - snapshots
   /vcenters:
     get:
-      description: Lists all vCenters with recorded snapshot totals.
+      description: Lists all vCenters with recorded snapshot totals, linking to the
+        fast daily aggregated totals page.
       produces:
       - text/html
       responses:
@@ -916,7 +917,8 @@ paths:
       - vcenters
   /vcenters/totals/daily:
     get:
-      description: Shows daily aggregated VM count/vCPU/RAM totals for a vCenter.
+      description: Shows daily aggregated VM count/vCPU/RAM totals for a vCenter (cache-backed
+        for fast loading).
       parameters:
       - description: vCenter URL
         in: query
@@ -967,7 +969,8 @@ paths:
       - vcenters
   /vm/trace:
     get:
-      description: Shows VM resource history across snapshots, with chart and table.
+      description: Shows VM resource history with an hourly detail view and a daily
+        aggregated view, with chart and table output.
       parameters:
       - description: VM ID
         in: query
@@ -981,6 +984,10 @@ paths:
         in: query
         name: name
         type: string
+      - description: 'hourly|daily (default: hourly)'
+        in: query
+        name: view
+        type: string
       produces:
       - text/html
       responses: