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https://github.com/christianselig/apollo-backend
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less mutations on the accounts table
This commit is contained in:
parent
f3814683b8
commit
1617bf88e1
1 changed files with 28 additions and 38 deletions
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@ -92,14 +92,14 @@ func SchedulerCmd(ctx context.Context) *cobra.Command {
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}
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s := gocron.NewScheduler(time.UTC)
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_, _ = s.Every(100).Milliseconds().SingletonMode().Do(func() { enqueueAccounts(ctx, logger, statsd, db, redis, luaSha, notifQueue) })
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_, _ = s.Every(5).Seconds().SingletonMode().Do(func() { enqueueAccounts(ctx, logger, statsd, db, redis, luaSha, notifQueue) })
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_, _ = s.Every(5).Second().Do(func() { enqueueSubreddits(ctx, logger, statsd, db, []rmq.Queue{subredditQueue, trendingQueue}) })
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_, _ = s.Every(5).Second().Do(func() { enqueueUsers(ctx, logger, statsd, db, userQueue) })
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_, _ = s.Every(5).Second().Do(func() { cleanQueues(logger, queue) })
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_, _ = s.Every(5).Second().Do(func() { enqueueStuckAccounts(ctx, logger, statsd, db, stuckNotificationsQueue) })
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_, _ = s.Every(1).Minute().Do(func() { reportStats(ctx, logger, statsd, db) })
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_, _ = s.Every(1).Minute().Do(func() { pruneAccounts(ctx, logger, db) })
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_, _ = s.Every(1).Minute().Do(func() { pruneDevices(ctx, logger, db) })
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//_, _ = s.Every(1).Minute().Do(func() { pruneAccounts(ctx, logger, db) })
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//_, _ = s.Every(1).Minute().Do(func() { pruneDevices(ctx, logger, db) })
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s.StartAsync()
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srv := &http.Server{Addr: ":8080"}
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@ -368,10 +368,22 @@ func enqueueStuckAccounts(ctx context.Context, logger *zap.Logger, statsd *stats
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func enqueueAccounts(ctx context.Context, logger *zap.Logger, statsd *statsd.Client, pool *pgxpool.Pool, redisConn *redis.Client, luaSha string, queue rmq.Queue) {
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now := time.Now()
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next := now.Add(domain.NotificationCheckInterval)
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ids := make([]string, maxNotificationChecks)
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idslen := 0
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query := `SELECT id FROM accounts`
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rows, err := pool.Query(ctx, query)
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if err != nil {
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logger.Error("failed to fetch accounts", zap.Error(err))
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return
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}
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defer rows.Close()
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var ids []int64
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for rows.Next() {
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var id int64
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_ = rows.Scan(&id)
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ids = append(ids, id)
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}
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enqueued := 0
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skipped := 0
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@ -382,51 +394,24 @@ func enqueueAccounts(ctx context.Context, logger *zap.Logger, statsd *statsd.Cli
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_ = statsd.Histogram("apollo.queue.runtime", float64(time.Since(now).Milliseconds()), tags, 1)
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}()
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stmt := fmt.Sprintf(`
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UPDATE accounts
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SET next_notification_check_at = $2
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WHERE accounts.id IN(
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SELECT id
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FROM accounts
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WHERE next_notification_check_at < $1
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ORDER BY next_notification_check_at
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FOR UPDATE SKIP LOCKED
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LIMIT %d
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)
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RETURNING accounts.reddit_account_id`, maxNotificationChecks)
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rows, err := pool.Query(ctx, stmt, now, next)
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if err != nil {
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logger.Error("failed to fetch batch of accounts", zap.Error(err))
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return
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}
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for i := 0; rows.Next(); i++ {
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_ = rows.Scan(&ids[i])
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idslen = i
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}
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rows.Close()
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if idslen == 0 {
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return
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}
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logger.Debug("enqueueing account batch", zap.Int("count", len(ids)), zap.Time("start", now))
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// Split ids in batches
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wg := sync.WaitGroup{}
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for i := 0; i < idslen; i += batchSize {
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for i := 0; i < len(ids); i += batchSize {
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wg.Add(1)
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go func(offset int) {
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defer wg.Done()
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j := offset + batchSize
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if j > idslen {
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j = idslen
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if j > len(ids) {
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j = len(ids)
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}
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batch := ids[offset:j]
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logger.Debug("enqueueing batch", zap.Int("len", len(batch)))
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unlocked, err := redisConn.EvalSha(ctx, luaSha, []string{"locks:accounts"}, batch).StringSlice()
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unlocked, err := redisConn.EvalSha(ctx, luaSha, []string{"locks:accounts"}, batch).Int64Slice()
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if err != nil {
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logger.Error("failed to check for locked accounts", zap.Error(err))
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}
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@ -438,7 +423,12 @@ func enqueueAccounts(ctx context.Context, logger *zap.Logger, statsd *statsd.Cli
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return
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}
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if err = queue.Publish(unlocked...); err != nil {
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payloads := make([]string, len(unlocked))
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for i, id := range unlocked {
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payloads[i] = fmt.Sprintf("%d", id)
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}
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if err = queue.Publish(payloads...); err != nil {
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logger.Error("failed to enqueue account batch", zap.Error(err))
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}
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}(i)
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