diff --git a/pageserver/src/tenant/timeline/detach_ancestor.rs b/pageserver/src/tenant/timeline/detach_ancestor.rs
index 7f59758c8704..4d8e5701819d 100644
--- a/pageserver/src/tenant/timeline/detach_ancestor.rs
+++ b/pageserver/src/tenant/timeline/detach_ancestor.rs
@@ -56,7 +56,7 @@ impl Default for Options {
     fn default() -> Self {
         Self {
             rewrite_concurrency: std::num::NonZeroUsize::new(2).unwrap(),
-            copy_concurrency: std::num::NonZeroUsize::new(10).unwrap(),
+            copy_concurrency: std::num::NonZeroUsize::new(100).unwrap(),
         }
     }
 }