From 9a24908f4da1c1f097ff05dc7df1960ed9df602c Mon Sep 17 00:00:00 2001
From: Eric Voskuil <eric@voskuil.org>
Date: Fri, 11 Sep 2026 19:31:37 -0400
Subject: [PATCH 1/2] Drop staged batch rows when batching will not run.

---
 .../bitcoin/node/chasers/chaser_validate.hpp  |  1 +
 src/chasers/chaser_validate_batch.cpp         | 19 +++++++++++++++----
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/include/bitcoin/node/chasers/chaser_validate.hpp b/include/bitcoin/node/chasers/chaser_validate.hpp
index 3def662d..e2d76eb8 100644
--- a/include/bitcoin/node/chasers/chaser_validate.hpp
+++ b/include/bitcoin/node/chasers/chaser_validate.hpp
@@ -83,6 +83,7 @@ class BCN_API chaser_validate
     virtual code start_batch() NOEXCEPT;
     virtual void process_batch(bool residual) NOEXCEPT;
     virtual code do_process_batch(bool startup) NOEXCEPT;
+    virtual code purge_batch() NOEXCEPT;
     virtual bool mark_valids(header_links& prevalids, bool startup) NOEXCEPT;
     virtual bool mark_invalids(header_links& prevalids,
         const header_links& invalids, bool startup) NOEXCEPT;
diff --git a/src/chasers/chaser_validate_batch.cpp b/src/chasers/chaser_validate_batch.cpp
index 9bd017a7..46bdd022 100644
--- a/src/chasers/chaser_validate_batch.cpp
+++ b/src/chasers/chaser_validate_batch.cpp
@@ -39,15 +39,19 @@ BC_PUSH_WARNING(NO_THROW_IN_NOEXCEPT)
 
 code chaser_validate::start_batch() NOEXCEPT
 {
-    if (!batch_enabled_)
-        return {};
-
-    const auto& query = archive();
+    auto& query = archive();
     if (is_zero(query.prevalid_records()) &&
         is_zero(query.ecdsa_records()) &&
         is_zero(query.schnorr_records()))
         return {};
 
+    // Prevalid is not a validation state, so dropped blocks validate in place.
+    if (!batch_enabled_)
+    {
+        LOGN("Dropping staged batch rows (" << query.prevalid_records() << ").");
+        return purge_batch();
+    }
+
     return do_process_batch(true);
 }
 
@@ -157,6 +161,13 @@ code chaser_validate::do_process_batch(bool startup) NOEXCEPT
     if (!mark_valids(prevalids, startup))
         return error::batch3;
 
+    return purge_batch();
+}
+
+code chaser_validate::purge_batch() NOEXCEPT
+{
+    auto& query = archive();
+
     // Purge prevalids before signatures.
     return query.purge_prevalids() &&
         query.purge_ecdsa_signatures() &&

From 984272e0fd2bb94f838b9135603a98da25f131dd Mon Sep 17 00:00:00 2001
From: Eric Voskuil <eric@voskuil.org>
Date: Fri, 11 Sep 2026 23:33:10 -0400
Subject: [PATCH 2/2] Remove the dirty page warning settings.

---
 include/bitcoin/node/settings.hpp | 2 --
 src/settings.cpp                  | 4 +---
 test/settings.cpp                 | 2 --
 3 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/include/bitcoin/node/settings.hpp b/include/bitcoin/node/settings.hpp
index 6d352c6f..cd0d7682 100644
--- a/include/bitcoin/node/settings.hpp
+++ b/include/bitcoin/node/settings.hpp
@@ -57,8 +57,6 @@ class BCN_API settings
     uint32_t silent_start_height;
     uint16_t sample_period_seconds;
     uint32_t currency_window_minutes;
-    uint16_t warn_dirty_background_ratio;
-    uint16_t warn_dirty_ratio;
     ////uint64_t snapshot_bytes;
     ////uint32_t snapshot_valid;
     ////uint32_t snapshot_confirm;
diff --git a/src/settings.cpp b/src/settings.cpp
index 668f13c6..e0748e5c 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -54,9 +54,7 @@ settings::settings() NOEXCEPT
     silent_start_height{ 0xffffffff_u32 },
     maximum_concurrency{ 50'000 },
     sample_period_seconds{ 10 },
-    currency_window_minutes{ 1440 },
-    warn_dirty_background_ratio{ 90_u16 },
-    warn_dirty_ratio{ 90_u16 }
+    currency_window_minutes{ 1440 }
 {
 }
 
diff --git a/test/settings.cpp b/test/settings.cpp
index 483c01a0..c4c6a4a0 100644
--- a/test/settings.cpp
+++ b/test/settings.cpp
@@ -55,8 +55,6 @@ BOOST_AUTO_TEST_CASE(settings__node__default_context__expected)
     BOOST_REQUIRE_EQUAL(node.maximum_concurrency_(), 50000_size);
     BOOST_REQUIRE_EQUAL(node.sample_period_seconds, 10_u16);
     BOOST_REQUIRE_EQUAL(node.currency_window_minutes, 1440_u32);
-    BOOST_REQUIRE_EQUAL(node.warn_dirty_background_ratio, 90_u16);
-    BOOST_REQUIRE_EQUAL(node.warn_dirty_ratio, 90_u16);
     ////BOOST_REQUIRE_EQUAL(node.snapshot_bytes, 200'000'000'000_u64);
     ////BOOST_REQUIRE_EQUAL(node.snapshot_valid, 250'000_u32);
     ////BOOST_REQUIRE_EQUAL(node.snapshot_confirm, 500'000_u32);