更新

backend/main.py

@@ -2567,14 +2567,25 @@ async def get_logs(
     if account_id is not None:
         await get_owned_account(db, user, account_id)
     limit = max(1, min(int(limit or 50), 500))
-    stmt = (
+    # Fetch only primary keys while MySQL performs the cross-account sort.
+    # Selecting the full ORM row here includes MEDIUMTEXT/TEXT columns, which
+    # makes MySQL 5.7 materialize a huge on-disk temporary table for non-admin
+    # users. Under polling load that grew ibtmp1 by tens of gigabytes.
+    id_stmt = (
         logs_for_user(user, account_id)
+        .with_only_columns(MessageLog.id)
         .order_by(MessageLog.created_at.desc())
         .offset(max(0, int(offset or 0)))
         .limit(limit)
     )
-    result = await db.execute(stmt)
+    ordered_ids = list((await db.execute(id_stmt)).scalars().all())
-    return result.scalars().all()
+    if not ordered_ids:
+        return []
+    rows = (
+        await db.execute(select(MessageLog).where(MessageLog.id.in_(ordered_ids)))
+    ).scalars().all()
+    rows_by_id = {row.id: row for row in rows}
+    return [rows_by_id[row_id] for row_id in ordered_ids if row_id in rows_by_id]
 
 
 @app.get("/api/received-messages", response_model=List[ReceivedMessageLogResponse])
@@ -2588,13 +2599,26 @@ async def get_received_messages(
     if account_id is not None:
         await get_owned_account(db, user, account_id)
     limit = max(1, min(int(limit or 100), 500))
-    stmt = (
+    # Keep the global sort narrow for the same reason as /api/logs. raw_content
+    # can be large and must only be loaded after LIMIT has selected the IDs.
+    id_stmt = (
         received_logs_for_user(user, account_id)
+        .with_only_columns(ReceivedMessageLog.id)
         .order_by(ReceivedMessageLog.created_at.desc())
         .limit(limit)
     )
-    result = await db.execute(stmt)
+    ordered_ids = list((await db.execute(id_stmt)).scalars().all())
-    return result.scalars().all()
+    if not ordered_ids:
+        return []
+    rows = (
+        await db.execute(
+            select(ReceivedMessageLog).where(
+                ReceivedMessageLog.id.in_(ordered_ids)
+            )
+        )
+    ).scalars().all()
+    rows_by_id = {row.id: row for row in rows}
+    return [rows_by_id[row_id] for row_id in ordered_ids if row_id in rows_by_id]
 
 
 @app.get("/api/system-logs", response_model=List[SystemLogResponse])

backend/models/db_migrate.py

@@ -126,6 +126,12 @@ def migrate_accounts_table(conn) -> None:
         "douyin_uid",
         {"default": "ALTER TABLE accounts ADD COLUMN douyin_uid VARCHAR(64)"},
     )
+    add_index_if_missing(
+        conn,
+        "accounts",
+        "ix_accounts_owner_id",
+        ("owner_id",),
+    )
 
 
 def migrate_account_videos_table(conn) -> None:

frontend/src/views/Logs.vue

@@ -39,9 +39,23 @@ const LOGS_PAGE_SIZE = 20
 const hasMoreLogs = ref(true)
 const loadingMore = ref(false)
 let pollTimer = null
+let pollStopped = false
 // 上次日志数据的签名；轮询时数据没变化就跳过赋值，避免无谓的重算与重渲染
 let lastLogsSignature = ''
 
+// Use a self-scheduling timeout instead of setInterval. A slow request must
+// finish before the next poll is scheduled, otherwise overlapping requests can
+// exhaust the database pool and amplify one slow query into dozens.
+const scheduleLogPoll = () => {
+  if (pollStopped) return
+  pollTimer = setTimeout(async () => {
+    if (!document.hidden) {
+      await fetchLogs(true)
+    }
+    scheduleLogPoll()
+  }, POLL_INTERVAL_MS)
+}
+
 const dedupeMessages = (messages) => {
   const map = new Map()
   for (const item of messages) {
@@ -593,10 +607,8 @@ onMounted(async () => {
   }
   await fetchAccounts()
   await fetchLogs()
-  pollTimer = setInterval(() => {
+  pollStopped = false
-    if (document.hidden) return
+  scheduleLogPoll()
-    fetchLogs(true)
-  }, POLL_INTERVAL_MS)
 })
 
 watch(
@@ -613,8 +625,9 @@ watch(
 )
 
 onUnmounted(() => {
+  pollStopped = true
   if (pollTimer) {
-    clearInterval(pollTimer)
+    clearTimeout(pollTimer)
     pollTimer = null
   }
 })