From c256e83ce8032cd3937a72c74da393ba5352522d Mon Sep 17 00:00:00 2001
From: evoskuil <eric@voskuil.org>
Date: Fri, 5 Jun 2026 20:51:01 -0400
Subject: [PATCH] Add warn dirty paging settings.

---
 include/bitcoin/node/settings.hpp | 10 ++++++----
 src/settings.cpp                  |  6 ++++--
 test/settings.cpp                 | 10 ++++++----
 3 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/include/bitcoin/node/settings.hpp b/include/bitcoin/node/settings.hpp
index ae6ff022..88983129 100644
--- a/include/bitcoin/node/settings.hpp
+++ b/include/bitcoin/node/settings.hpp
@@ -34,6 +34,7 @@ class BCN_API settings
     settings(system::chain::selection context) NOEXCEPT;
 
     /// Properties.
+    uint32_t threads;
     bool delay_inbound;
     bool headers_first;
     bool thread_priority;
@@ -47,14 +48,15 @@ class BCN_API settings
     float minimum_bump_rate;
     uint16_t announcement_cache;
     uint16_t fee_estimate_horizon;
-    ////uint64_t snapshot_bytes;
-    ////uint32_t snapshot_valid;
-    ////uint32_t snapshot_confirm;
     uint32_t maximum_height;
     uint32_t maximum_concurrency;
     uint16_t sample_period_seconds;
     uint32_t currency_window_minutes;
-    uint32_t threads;
+    uint16_t warn_dirty_background_ratio;
+    uint16_t warn_dirty_ratio;
+    ////uint64_t snapshot_bytes;
+    ////uint32_t snapshot_valid;
+    ////uint32_t snapshot_confirm;
 
     /// Helpers.
     virtual size_t threads_() const NOEXCEPT;
diff --git a/src/settings.cpp b/src/settings.cpp
index 02bbd06e..af900e3f 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -30,7 +30,8 @@ namespace libbitcoin {
 namespace node {
 
 settings::settings() NOEXCEPT
-  : delay_inbound{ true },
+  : threads{ 1 },
+    delay_inbound{ true },
     headers_first{ true },
     memory_priority{ true },
     thread_priority{ true },
@@ -50,7 +51,8 @@ settings::settings() NOEXCEPT
     maximum_concurrency{ 50'000 },
     sample_period_seconds{ 10 },
     currency_window_minutes{ 1440 },
-    threads{ 1 }
+    warn_dirty_background_ratio{ 90_u16 },
+    warn_dirty_ratio{ 90_u16 }
 {
 }
 
diff --git a/test/settings.cpp b/test/settings.cpp
index 38739f21..f63af133 100644
--- a/test/settings.cpp
+++ b/test/settings.cpp
@@ -30,6 +30,7 @@ BOOST_AUTO_TEST_CASE(settings__node__default_context__expected)
     using namespace network;
 
     const node::settings node{};
+    BOOST_REQUIRE_EQUAL(node.threads, 1_u32);
     BOOST_REQUIRE_EQUAL(node.delay_inbound, true);
     BOOST_REQUIRE_EQUAL(node.headers_first, true);
     BOOST_REQUIRE_EQUAL(node.memory_priority, true);
@@ -43,16 +44,17 @@ BOOST_AUTO_TEST_CASE(settings__node__default_context__expected)
     BOOST_REQUIRE_EQUAL(node.allowed_deviation, 1.5);
     BOOST_REQUIRE_EQUAL(node.announcement_cache, 42_u16);
     BOOST_REQUIRE_EQUAL(node.fee_estimate_horizon, 0u);
-    ////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);
     BOOST_REQUIRE_EQUAL(node.maximum_height, 0_u32);
     BOOST_REQUIRE_EQUAL(node.maximum_height_(), max_size_t);
     BOOST_REQUIRE_EQUAL(node.maximum_concurrency, 50000_u32);
     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.threads, 1_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);
 
     BOOST_REQUIRE_EQUAL(node.threads_(), one);
     BOOST_REQUIRE_EQUAL(node.maximum_height_(), max_size_t);