revert change and adjust numInsertionWorkersDefault to from 10 to 1

Author: radoslawszulgo

cmd/pbm-agent/restore.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"runtime"
 	"time"
 
 	"github.com/percona/percona-backup-mongodb/pbm/backup"
@@ -120,7 +121,7 @@ func (a *Agent) Restore(ctx context.Context, r *ctrl.RestoreCmd, opid ctrl.OPID,
 			return
 		}
 
-		numParallelColls := 1
+		numParallelColls := runtime.NumCPU() / 2
 		if r.NumParallelColls != nil && *r.NumParallelColls > 0 {
 			numParallelColls = int(*r.NumParallelColls)
 		} else if cfg.Restore != nil && cfg.Restore.NumParallelCollections > 0 {

pbm/snapshot/restore.go

@@ -17,7 +17,7 @@ const (
 	preserveUUID = true
 
 	batchSizeDefault           = 500
-	numInsertionWorkersDefault = 10
+	numInsertionWorkersDefault = 1
 )
 
 var ExcludeFromRestore = []string{