diff --git a/upstairs/src/lib.rs b/upstairs/src/lib.rs
index 79d6469f4..7c28edcc6 100644
--- a/upstairs/src/lib.rs
+++ b/upstairs/src/lib.rs
@@ -108,7 +108,7 @@ pub const IO_OUTSTANDING_MAX_JOBS: usize = 1000;
 ///
 /// Caching complete jobs allows us to replay them if a Downstairs goes offline
 /// them comes back.
-const IO_CACHED_MAX_BYTES: u64 = 1024 * 1024 * 1024; // 1 GiB
+const IO_CACHED_MAX_BYTES: u64 = 64 * 1024 * 1024; // 64 MiB
 
 /// Maximum of jobs to cache from complete (but un-flushed) IO
 ///