보유종목 1분마다 호출하는부분 수정

backend/app/api/endpoints/day_trading.py

@@ -101,10 +101,17 @@ _last_reset_date: Optional[date] = None
 # 매매 실행 lock — _positions/_daily_pnl/_closed_today 변경 시 반드시 획득
 _trade_lock = asyncio.Lock()
 
+# 포트폴리오 요약 캐시 (get_balance() 호출 최소화)
+_portfolio_summary_cache: Dict[str, float] = {}
+_portfolio_summary_ts: Optional[datetime] = None
+_portfolio_cache_dirty: bool = True      # 최초 또는 매매 발생 시 강제 갱신
+_PORTFOLIO_CACHE_TTL: float = 300.0     # 매매 없을 때 최대 5분 캐시 유지
+
 
 def _reset_if_new_day() -> None:
     """날짜가 바뀌면 일일 상태 초기화"""
     global _daily_pnl, _orb_cache, _last_reset_date, _last_total_assets, _closed_today
+    global _portfolio_summary_cache, _portfolio_summary_ts, _portfolio_cache_dirty
     today = _today_kst()
     if _last_reset_date != today:
         _daily_pnl = 0.0
@@ -112,6 +119,9 @@ def _reset_if_new_day() -> None:
         _last_total_assets = 0.0
         _closed_today = set()
         _last_reset_date = today
+        _portfolio_summary_cache = {}
+        _portfolio_summary_ts = None
+        _portfolio_cache_dirty = True
         logger.info(f"📅 데이트레이딩 상태 일일 초기화: {today}")
 
 
@@ -143,18 +153,39 @@ async def _get_current_price(stock_code: str) -> float:
         return 0.0
 
 
-async def _get_portfolio_summary() -> Dict[str, float]:
-    """포트폴리오 요약 (총자산, 가용 현금)"""
+async def _get_portfolio_summary(force: bool = False) -> Dict[str, float]:
+    """포트폴리오 요약 (총자산, 가용 현금).
+
+    매매가 발생했거나 캐시 TTL이 만료된 경우에만 KIS get_balance() 호출.
+    그 외에는 인메모리 캐시 반환 (API 호출 최소화).
+    """
+    global _portfolio_summary_cache, _portfolio_summary_ts, _portfolio_cache_dirty
+
+    now = _kst_now()
+    cache_age = (now - _portfolio_summary_ts).total_seconds() if _portfolio_summary_ts else 9999.0
+    cache_valid = (
+        not _portfolio_cache_dirty
+        and cache_age < _PORTFOLIO_CACHE_TTL
+        and bool(_portfolio_summary_cache)
+    )
+
+    if not force and cache_valid:
+        logger.debug(f"⏭️ Portfolio summary cache hit (age={cache_age:.0f}s) — skipping get_balance()")
+        return _portfolio_summary_cache
+
     try:
         balance = await korea_investment_api.get_balance()
         output2 = balance.get("output2", [{}])
         summary = output2[0] if output2 else {}
         total_assets = float(summary.get("tot_evlu_amt", 0) or 0)
         available_cash = float(summary.get("prvs_rcdl_excc_amt", 0) or 0)
-        return {"total_assets": total_assets, "available_cash": available_cash}
+        _portfolio_summary_cache = {"total_assets": total_assets, "available_cash": available_cash}
+        _portfolio_summary_ts = now
+        _portfolio_cache_dirty = False
+        return _portfolio_summary_cache
     except Exception as e:
         logger.error(f"포트폴리오 조회 실패: {e}")
-        return {"total_assets": 0.0, "available_cash": 0.0}
+        return _portfolio_summary_cache or {"total_assets": 0.0, "available_cash": 0.0}
 
 
 async def _place_buy_order(
@@ -412,6 +443,7 @@ async def _check_exits(
                 ok = await _place_sell_order(code, quantity, price=0)  # 시장가
                 if ok:
                     pnl = (current_price - pos["entry_price"]) * quantity
+                    _portfolio_cache_dirty = True  # 매도 체결 → 잔고 변경됨
                     async with _trade_lock:
                         _daily_pnl += pnl
                         _positions.pop(code, None)
@@ -580,6 +612,9 @@ async def _execute_entry(signal: DayTradeSignal, quantity: int) -> Optional[Dict
         if not order_no:
             return None
 
+        global _portfolio_cache_dirty
+        _portfolio_cache_dirty = True  # 매수 체결 → 잔고 변경됨
+
         _positions[signal.stock_code] = {
             "stock_name": signal.stock_name,
             "strategy": signal.strategy,
@@ -643,6 +678,7 @@ async def _execute_eod_flat() -> None:
             ok = await _place_sell_order(code, pos["quantity"], price=0)
             if ok:
                 pnl = (current_price - pos["entry_price"]) * pos["quantity"]
+                _portfolio_cache_dirty = True  # EOD 청산 → 잔고 변경됨
                 async with _trade_lock:
                     _daily_pnl += pnl
                     _positions.pop(code, None)

backend/app/api/endpoints/portfolio.py

@@ -606,7 +606,13 @@ async def check_and_execute_exit_trades(db: AsyncSession):
     from datetime import datetime
 
     try:
-        await sync_portfolio(db, force=True)
+        # 매매가 발생했거나 캐시가 비어있을 때만 KIS 잔고 조회 (API 호출 최소화)
+        latest_trade_id = await _get_latest_executed_trade_id(db)
+        if latest_trade_id != portfolio_cache.last_trade_id or not portfolio_cache.holdings:
+            logger.info(f"🔄 New trade detected (prev={portfolio_cache.last_trade_id}, cur={latest_trade_id}) — syncing balance")
+            await sync_portfolio(db, force=True)
+        else:
+            logger.debug("⏭️ No new trade since last sync — skipping get_balance()")
 
         # MDD 업데이트 (async — thread-safe lock 내부)
         summary = await _get_portfolio_summary(db)