diff --git a/modules/story-summary/vector/pipeline/state-integration.js b/modules/story-summary/vector/pipeline/state-integration.js
index 26982f0..f5d1ae6 100644
--- a/modules/story-summary/vector/pipeline/state-integration.js
+++ b/modules/story-summary/vector/pipeline/state-integration.js
@@ -31,6 +31,7 @@ const MODULE_ID = 'state-integration';
 // ★ 并发配置
 const CONCURRENCY = 50;
 const STAGGER_DELAY = 15;
+const DEBUG_CONCURRENCY = true;
 
 let initialized = false;
 let extractionCancelled = false;
@@ -154,6 +155,9 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
     let failed = 0;
     const total = pendingPairs.length;
     let builtAtoms = 0;
+    let active = 0;
+    let peakActive = 0;
+    const tStart = performance.now();
 
     // ★ Phase 1: 收集所有新提取的 atoms（不向量化）
     const allNewAtoms = [];
@@ -163,7 +167,7 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
     const poolSize = Math.min(CONCURRENCY, pendingPairs.length);
     let nextIndex = 0;
     let started = 0;
-    const runWorker = async () => {
+    const runWorker = async (workerId) => {
         while (true) {
             if (extractionCancelled) return;
             const idx = nextIndex++;
@@ -180,6 +184,12 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
             const floor = pair.aiFloor;
             const prev = getL0FloorStatus(floor);
 
+            active++;
+            if (active > peakActive) peakActive = active;
+            if (DEBUG_CONCURRENCY && (idx % 10 === 0)) {
+                xbLog.info(MODULE_ID, `L0 pool start idx=${idx} active=${active} peak=${peakActive} worker=${workerId}`);
+            }
+
             try {
                 const atoms = await extractAtomsForRound(pair.userMsg, pair.aiMsg, floor, { timeout: 20000 });
 
@@ -210,15 +220,24 @@ export async function incrementalExtractAtoms(chatId, chat, onProgress) {
                 });
                 failed++;
             } finally {
+                active--;
                 if (!extractionCancelled) {
                     completed++;
                     onProgress?.(`提取: ${completed}/${total}`, completed, total);
                 }
+                if (DEBUG_CONCURRENCY && (completed % 25 === 0 || completed === total)) {
+                    const elapsed = Math.max(1, Math.round(performance.now() - tStart));
+                    xbLog.info(MODULE_ID, `L0 pool progress=${completed}/${total} active=${active} peak=${peakActive} elapsedMs=${elapsed}`);
+                }
             }
         }
     };
 
-    await Promise.all(Array.from({ length: poolSize }, runWorker));
+    await Promise.all(Array.from({ length: poolSize }, (_, i) => runWorker(i)));
+    if (DEBUG_CONCURRENCY) {
+        const elapsed = Math.max(1, Math.round(performance.now() - tStart));
+        xbLog.info(MODULE_ID, `L0 pool done completed=${completed}/${total} failed=${failed} peakActive=${peakActive} elapsedMs=${elapsed}`);
+    }
 
     try {
         saveMetadataDebounced?.();