Merge pull request #629 from SiaFoundation/chris/speedup-object-stats

Speed up ObjectsStats by splitting up query

stores/metadata.go

@@ -560,21 +560,25 @@ func (s *SQLStore) ObjectsStats(ctx context.Context) (api.ObjectsStatsResponse,
 		resp.NumObjects = objInfo.NumObjects
 		resp.TotalObjectsSize = objInfo.TotalObjectsSize
 
-		// Size of sectors
-		var sectorSizes struct {
-			SectorsSize  uint64
-			UploadedSize uint64
+		var totalSectors uint64
+		err = tx.Model(&dbSector{}).
+			Raw("SELECT COUNT(*) FROM (SELECT 1 FROM contract_sectors cs GROUP BY cs.db_sector_id) sectors").
+			Scan(&totalSectors).
+			Error
+		if err != nil {
+			return err
 		}
-		err = tx.
-			Model(&dbContractSector{}).
-			Select("COUNT(DISTINCT db_sector_id) * ? as sectors_size, COUNT(*) * ? as uploaded_size", rhpv2.SectorSize, rhpv2.SectorSize).
-			Scan(&sectorSizes).
+
+		var totalUploaded int64
+		err = tx.Model(&dbContractSector{}).
+			Count(&totalUploaded).
 			Error
 		if err != nil {
 			return err
 		}
-		resp.TotalSectorsSize = sectorSizes.SectorsSize
-		resp.TotalUploadedSize = sectorSizes.UploadedSize
+
+		resp.TotalSectorsSize = totalSectors * rhpv2.SectorSize
+		resp.TotalUploadedSize = uint64(totalUploaded) * rhpv2.SectorSize
 		return nil
 	})
 }