retain map, wait for 5 mins

src/internal/m365/collection/drive/collection.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
+	"unsafe"
 
 	"github.com/alcionai/clues"
 	"github.com/microsoftgraph/msgraph-sdk-go/models"
@@ -467,8 +468,12 @@ func (oc *Collection) populateItems(ctx context.Context, errs *fault.Bus) {
 
 	wg.Wait()
 
+	// print memory for oc.DriveItems
+	size := unsafe.Sizeof(oc.driveItems)
+	logger.Ctx(ctx).Infow("driveItems map size", "size", size)
+
 	// free up memory
-	oc.driveItems = make(map[string]models.DriveItemable)
+	//oc.driveItems = make(map[string]models.DriveItemable)
 	oc.reportAsCompleted(ctx, int(stats.itemsFound), int(stats.itemsRead), stats.byteCount)
 }
 

src/internal/operations/backup.go

@@ -373,7 +373,7 @@ func (op *BackupOperation) do(
 	cs := []data.BackupCollection{}
 	canUsePreviousBackup := false
 
-	var maxCount int = 5
+	var maxCount int = 2
 
 	for i := 0; i < maxCount; i++ {
 		logger.Ctx(ctx).Info("delta query iteration")
@@ -396,6 +396,9 @@ func (op *BackupOperation) do(
 			"can_use_previous_backup", canUsePreviousBackup,
 			"collection_count", len(cs))
 
+		// sleep for 5 mins
+		time.Sleep(5 * time.Minute)
+
 		if i == maxCount-1 {
 			return nil, clues.New("unable to produce backup collections").WithClues(ctx)
 		}