From 71cec0dc358e8b2c56b4dfb6f06f334a4fa7af21 Mon Sep 17 00:00:00 2001
From: shy3130 <415333856@qq.com>
Date: Wed, 9 Sep 2026 16:10:03 +0800
Subject: [PATCH] =?UTF-8?q?ops(strategy):=20clear=5Fcache=20=E8=AE=B0?=
 =?UTF-8?q?=E5=BD=95=E8=B0=83=E7=94=A8=E9=93=BE=E6=97=A5=E5=BF=97?=
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策略页依赖 strategy_cache 秒加载, 缓存被清空即整页回退到全量重算。
今日线上排查: 缓存在扩展表拉取后 12ms 消失, 但三个已知调用方均无
触发记录, 静态分析无法定位。clear_cache 打 WARNING 附最近 5 帧调用
链, 此类问题不再依赖复现现场。
---
 backend/app/services/strategy_cache.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/backend/app/services/strategy_cache.py b/backend/app/services/strategy_cache.py
index 1252697..5d319d1 100644
--- a/backend/app/services/strategy_cache.py
+++ b/backend/app/services/strategy_cache.py
@@ -75,6 +75,15 @@ def read_cache(data_dir: Path) -> dict | None:
 
 def clear_cache(data_dir: Path) -> None:
     """删除策略结果缓存；策略代码 reload 后避免继续展示旧公式结果。"""
+    import traceback
+
+    # 运维可见性: 策略页依赖本缓存秒加载, 被清空即整页回退到全量重算。
+    # 记录调用链 (最近 5 帧), 排查"缓存莫名消失"类问题不需要复现现场。
+    frames = traceback.extract_stack()[:-1]
+    chain = " <- ".join(
+        f"{f.filename.rsplit('/', 1)[-1]}:{f.lineno}:{f.name}" for f in frames[-5:]
+    )
+    logger.warning("策略缓存被清除, 调用链: %s", chain)
     path = _cache_path(data_dir)
     with _file_lock:
         path.unlink(missing_ok=True)