diff --git a/pageserver/src/tenant/blob_io.rs b/pageserver/src/tenant/blob_io.rs
index 0d33100ead..6e90b3e8ff 100644
--- a/pageserver/src/tenant/blob_io.rs
+++ b/pageserver/src/tenant/blob_io.rs
@@ -121,7 +121,7 @@ impl<const BUFFERED: bool> BlobWriter<BUFFERED> {
         self.offset
     }
 
-    const CAPACITY: usize = if BUFFERED { PAGE_SZ } else { 0 };
+    const CAPACITY: usize = if BUFFERED { 64 * 1024 } else { 0 };
 
     /// Writes the given buffer directly to the underlying `VirtualFile`.
     /// You need to make sure that the internal buffer is empty, otherwise
diff --git a/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs b/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs
index 34944b1072..4159b5820a 100644
--- a/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs
+++ b/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs
@@ -27,7 +27,7 @@ use crate::{
     },
 };
 
-const TAIL_SZ: usize = PAGE_SZ;
+const TAIL_SZ: usize = 64 * 1024;
 
 /// See module-level comment.
 pub struct RW<W: OwnedAsyncWriter> {