diff --git a/src/boss.js b/src/boss.js
index 55e67e8..36b9e78 100644
--- a/src/boss.js
+++ b/src/boss.js
@@ -6,6 +6,11 @@ const events = {
   warn: 'warn'
 }
 
+const WARNINGS = {
+  SLOW_QUERY: { seconds: 30, message: 'Warning: slow query. Your queues and/or database server should be reviewed' },
+  LARGE_QUEUE: { size: 10_000, mesasge: 'Warning: large queue. Your queue should be reviewed' }
+}
+
 class Boss extends EventEmitter {
   #stopped
   #maintaining
@@ -26,6 +31,14 @@ class Boss extends EventEmitter {
     this.functions = [
       this.maintain
     ]
+
+    if(this.#config.warningSlowQuerySeconds) {
+      WARNINGS.SLOW_QUERY.seconds = this.#config.warningSlowQuerySeconds
+    }
+
+    if(this.#config.warningLargeQueueSize) {
+      WARNINGS.LARGE_QUEUE.size = this.#config.warningLargeQueueSize
+    }
   }
 
   async start () {
@@ -51,9 +64,8 @@ class Boss extends EventEmitter {
 
     const elapsed = (ended - started) / 1000
 
-    if (elapsed > 30 || this.#config.__test__warn_slow_query) {
-      const message = 'Warning: slow query. Your queues and/or database server should be reviewed'
-      this.emit(events.warn, { message, elapsed, sql, values })
+    if (elapsed > WARNINGS.SLOW_QUERY.seconds || this.#config.__test__warn_slow_query) {
+      this.emit(events.warn, { message: WARNINGS.SLOW_QUERY.message, elapsed, sql, values })
     }
 
     return result
@@ -98,19 +110,29 @@ class Boss extends EventEmitter {
     }, {})
 
     for (const queueGroup of Object.values(queueGroups)) {
-      await this.#monitorActive(queueGroup)
-      await this.#dropCompleted(queueGroup)
+      const { table, queues } = queueGroup
+      const names = queues.map(i => i.name)
+
+      while (names.length) {
+        const chunk = names.splice(0, 100)
+
+        await this.#monitorActive(table, chunk)
+        await this.#dropCompleted(table, chunk)
+      }
     }
   }
 
-  async #monitorActive (queueGroup) {
-    const { table, queues } = queueGroup
-    const names = queues.map(i => i.name)
-
+  async #monitorActive (table, names) {
     const command = plans.trySetQueueMonitorTime(this.#config.schema, names, this.#config.monitorIntervalSeconds)
     const { rows } = await this.#executeSql(command)
 
     if (rows.length) {
+      const warnings = rows.filter(i => i.queuedCount > WARNINGS.LARGE_QUEUE.size)
+
+      for (const warning of warnings) {
+        this.emit(events.warn, { ...warning, message: WARNINGS.LARGE_QUEUE.mesasge })
+      }
+
       const sql = plans.failJobsByTimeout(this.#config.schema, table, names)
       await this.#executeSql(sql)
 
@@ -119,10 +141,7 @@ class Boss extends EventEmitter {
     }
   }
 
-  async #dropCompleted (queueGroup) {
-    const { table, queues } = queueGroup
-    const names = queues.map(i => i.name)
-
+  async #dropCompleted (table, names) {
     const command = plans.trySetQueueDeletionTime(this.#config.schema, names, this.#config.maintenanceIntervalSeconds)
     const { rows } = await this.#executeSql(command)
 
diff --git a/src/plans.js b/src/plans.js
index 25fffdf..774f8c0 100644
--- a/src/plans.js
+++ b/src/plans.js
@@ -422,7 +422,12 @@ function trySetQueueTimestamp (schema, queues, column, seconds) {
     SET ${column} = now()
     WHERE name IN(${getQueueInClause(queues)})
       AND EXTRACT( EPOCH FROM (now() - COALESCE(${column}, now() - interval '1 week') ) ) > ${seconds}
-    RETURNING true
+    RETURNING 
+      name,
+      deferred_count as "deferredCount",
+      queued_count as "queuedCount",
+      active_count as "activeCount",
+      total_count as "totalCount"
   `
 }
 
@@ -896,7 +901,7 @@ function cacheQueueStats (schema, table, queues) {
       active_count = stats.active_count,
       total_count = stats.total_count
     FROM stats
-      WHERE queue.name = stats.name
+      WHERE queue.name = stats.name    
   `
 
   return locked(schema, sql, 'queue-stats')