deploy fea5985b

lib/mongoPool.ts

@@ -106,7 +106,11 @@ async function usage(group: ShardGroup): Promise<number[]> {
     dbs.map(async (db) => {
       try {
         const s = await db.command({ dbStats: 1, scale: 1 })
-        return (s.storageSize ?? 0) + (s.indexSize ?? 0)
+        // dataSize, NOT storageSize. Atlas bills uncompressed BSON plus indexes;
+        // storageSize is the compressed on-disk figure and reads ~40% lower, so
+        // using it reports a cluster as half full when Atlas has already blocked
+        // writes on it.
+        return (s.dataSize ?? 0) + (s.indexSize ?? 0)
       } catch {
         return 0 // unreachable shard: don't let a probe failure block writes
       }

scripts/check-shards.mjs

@@ -45,7 +45,7 @@ for (const [group, prefix, collection] of [
       await client.connect()
       const db = client.db(DB_NAME)
       const stats = await db.command({ dbStats: 1, scale: 1 })
-      const used = (stats.storageSize ?? 0) + (stats.indexSize ?? 0)
+      const used = (stats.dataSize ?? 0) + (stats.indexSize ?? 0)
       const pct = ((used / QUOTA) * 100).toFixed(1)
       const cols = (await db.listCollections().toArray()).map((c) => c.name)
       const docs = cols.includes(collection)