fix(prune): improve pruner log readability (#21522)

Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: joshieDo <93316087+joshieDo@users.noreply.github.com>

Cargo.lock

@@ -10248,6 +10248,7 @@ dependencies = [
  "strum 0.27.2",
  "thiserror 2.0.18",
  "toml",
+ "tracing",
 ]
 
 [[package]]

crates/prune/prune/src/pruner.rs

@@ -149,21 +149,7 @@ where
         let elapsed = start.elapsed();
         self.metrics.duration_seconds.record(elapsed);
 
-        let message = match output.progress {
-            PruneProgress::HasMoreData(_) => "Pruner interrupted and has more data to prune",
-            PruneProgress::Finished => "Pruner finished",
-        };
-
-        debug!(
-            target: "pruner",
-            %tip_block_number,
-            ?elapsed,
-            ?deleted_entries,
-            ?limiter,
-            ?output,
-            ?stats,
-            "{message}",
-        );
+        output.debug_log(tip_block_number, deleted_entries, elapsed);
 
         self.event_sender.notify(PrunerEvent::Finished { tip_block_number, elapsed, stats });
 

crates/prune/types/Cargo.toml

@@ -18,6 +18,7 @@ alloy-primitives.workspace = true
 derive_more.workspace = true
 strum = { workspace = true, features = ["derive"] }
 thiserror.workspace = true
+tracing.workspace = true
 
 modular-bitfield = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"], optional = true }
@@ -42,8 +43,9 @@ std = [
     "derive_more/std",
     "serde?/std",
     "serde_json/std",
-    "thiserror/std",
     "strum/std",
+    "thiserror/std",
+    "tracing/std",
 ]
 test-utils = [
     "std",

crates/prune/types/src/pruner.rs

@@ -1,7 +1,9 @@
 use crate::{PruneCheckpoint, PruneMode, PruneSegment};
-use alloc::vec::Vec;
+use alloc::{format, string::ToString, vec::Vec};
 use alloy_primitives::{BlockNumber, TxNumber};
+use core::time::Duration;
 use derive_more::Display;
+use tracing::debug;
 
 /// Pruner run output.
 #[derive(Debug)]
@@ -18,6 +20,49 @@ impl From<PruneProgress> for PrunerOutput {
     }
 }
 
+impl PrunerOutput {
+    /// Logs a human-readable summary of the pruner run at DEBUG level.
+    ///
+    /// Format: `"Pruner finished tip=24328929 deleted=10886 elapsed=148ms
+    /// segments=AccountHistory[24318865, done] ..."`
+    #[inline]
+    pub fn debug_log(
+        &self,
+        tip_block_number: BlockNumber,
+        deleted_entries: usize,
+        elapsed: Duration,
+    ) {
+        let message = match self.progress {
+            PruneProgress::HasMoreData(_) => "Pruner interrupted, has more data",
+            PruneProgress::Finished => "Pruner finished",
+        };
+
+        let segments: Vec<_> = self
+            .segments
+            .iter()
+            .filter(|(_, seg)| seg.pruned > 0)
+            .map(|(segment, seg)| {
+                let block = seg
+                    .checkpoint
+                    .and_then(|c| c.block_number)
+                    .map(|b| b.to_string())
+                    .unwrap_or_else(|| "?".to_string());
+                let status = if seg.progress.is_finished() { "done" } else { "in_progress" };
+                format!("{segment}[{block}, {status}]")
+            })
+            .collect();
+
+        debug!(
+            target: "pruner",
+            %tip_block_number,
+            deleted_entries,
+            ?elapsed,
+            segments = %segments.join(" "),
+            "{message}",
+        );
+    }
+}
+
 /// Represents information of a pruner run for a segment.
 #[derive(Debug, Clone, PartialEq, Eq, Display)]
 #[display("(table={segment}, pruned={pruned}, status={progress})")]