diff --git a/config/runtime.exs b/config/runtime.exs
index 7dcdaa0e..ce0f240d 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -254,8 +254,11 @@ if config_env() == :prod do
          # Sync device usage to Stripe daily at 3 AM UTC
          {"0 3 * * *", Towerops.Workers.BillingSyncWorker}
        ]},
-      # Automatically delete completed jobs after 60 seconds
-      {Oban.Plugins.Pruner, max_age: 60},
+      # Automatically delete completed jobs after 60 seconds.
+      # Default limit of 10k/30s (333/s) can't keep up with job throughput (~600+/s),
+      # causing oban_jobs to bloat to millions of rows and slow all queries.
+      # 50k/5s (10,000/s) keeps the table small.
+      {Oban.Plugins.Pruner, max_age: 60, limit: 50_000, interval: to_timeout(second: 5)},
       # Rescue orphaned jobs (when node crashes)
       {Oban.Plugins.Reindexer, schedule: "0 2 * * *"},
       # Rescue jobs stuck in executing state (mark as cancelled after 10 minutes)