diff --git a/cube/model/alarms.yml b/cube/model/alarms.yml
index b11de65..d83a7c0 100644
--- a/cube/model/alarms.yml
+++ b/cube/model/alarms.yml
@@ -157,7 +157,11 @@ cubes:
         granularity: hour
         partition_granularity: month
         refresh_key:
-          every: 10 minutes
+          # 24h, not minutes: the fixtures are static, so a shorter
+          # interval rebuilds a byte-identical result on a 2-vCPU host
+          # and was a standing CPU load for no gain. Tune this back
+          # deliberately when imh makes the data genuinely live.
+          every: 24 hours
         build_range_start:
           sql: "SELECT now() - interval '180 days'"
         build_range_end:
diff --git a/cube/model/operations.yml b/cube/model/operations.yml
index 65fd621..99f2989 100644
--- a/cube/model/operations.yml
+++ b/cube/model/operations.yml
@@ -165,7 +165,11 @@ cubes:
         granularity: day
         partition_granularity: month
         refresh_key:
-          every: 30 minutes
+          # 24h, not minutes: the fixtures are static, so a shorter
+          # interval rebuilds a byte-identical result on a 2-vCPU host
+          # and was a standing CPU load for no gain. Tune this back
+          # deliberately when imh makes the data genuinely live.
+          every: 24 hours
         build_range_start:
           sql: "SELECT now() - interval '365 days'"
         build_range_end:
diff --git a/cube/model/process_values.yml b/cube/model/process_values.yml
index 456aa24..e474915 100644
--- a/cube/model/process_values.yml
+++ b/cube/model/process_values.yml
@@ -201,7 +201,11 @@ cubes:
         granularity: hour
         partition_granularity: month
         refresh_key:
-          every: 10 minutes
+          # 24h, not minutes: the fixtures are static, so a shorter
+          # interval rebuilds a byte-identical result on a 2-vCPU host
+          # and was a standing CPU load for no gain. Tune this back
+          # deliberately when imh makes the data genuinely live.
+          every: 24 hours
         build_range_start:
           sql: "SELECT now() - interval '180 days'"
         build_range_end: