diff --git a/src/storage/benches/bench_compactor.rs b/src/storage/benches/bench_compactor.rs
index 5f9ee1c8e8524..decaffdb63e4c 100644
--- a/src/storage/benches/bench_compactor.rs
+++ b/src/storage/benches/bench_compactor.rs
@@ -87,7 +87,8 @@ pub fn test_key_of(idx: usize, epoch: u64) -> FullKey<Vec<u8>> {
     )
 }
 
-const MAX_KEY_COUNT: usize = 128 * 1024;
+/// 8M keys.
+const MAX_KEY_COUNT: usize = 8 * 1024 * 1024;
 
 async fn build_table(
     sstable_store: SstableStoreRef,