From 81dc5e21363df00033eaec34dae22475734b0537 Mon Sep 17 00:00:00 2001
From: Derek Cofausper <256792747+decofe@users.noreply.github.com>
Date: Mon, 23 Mar 2026 19:26:42 +0100
Subject: [PATCH] perf: disable readahead on slot-preimage MDBX environment
 (#23183)

Co-authored-by: joshieDo <93316087+joshieDo@users.noreply.github.com>
---
 crates/stages/stages/src/stages/execution/slot_preimages.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/stages/stages/src/stages/execution/slot_preimages.rs b/crates/stages/stages/src/stages/execution/slot_preimages.rs
index 80b401de9e..c08f65803b 100644
--- a/crates/stages/stages/src/stages/execution/slot_preimages.rs
+++ b/crates/stages/stages/src/stages/execution/slot_preimages.rs
@@ -48,6 +48,7 @@ impl SlotPreimages {
         builder.write_map();
         builder.set_flags(EnvironmentFlags {
             no_sub_dir: false,
+            no_rdahead: true,
             mode: Mode::ReadWrite { sync_mode: SyncMode::Durable },
             ..Default::default()
         });