diff --git a/module/zfs/dsl_scan.c b/module/zfs/dsl_scan.c
index f9e437f0c947..67c7771d4836 100644
--- a/module/zfs/dsl_scan.c
+++ b/module/zfs/dsl_scan.c
@@ -147,7 +147,7 @@ static int zfs_scan_strict_mem_lim = B_FALSE;
  * overload the drives with I/O, since that is protected by
  * zfs_vdev_scrub_max_active.
  */
-static uint64_t zfs_scan_vdev_limit = 4 << 20;
+static uint64_t zfs_scan_vdev_limit = 16 << 20;
 
 static uint_t zfs_scan_issue_strategy = 0;