Introduce polling timeout for asynchronous queue

The current timeout for checking updates in the asynchronous queue is
equal to the timeout used for queue entry
(async_insert_busy_timeout_ms).
That means that, in the worst case, an entry spends twice the time of the
asynchronous timeout in the queue.

src/Core/Settings.h

@@ -751,6 +751,7 @@ class IColumn;
     M(UInt64, async_insert_max_data_size, 1000000, "Maximum size in bytes of unparsed data collected per query before being inserted", 0) \
     M(UInt64, async_insert_max_query_number, 450, "Maximum number of insert queries before being inserted", 0) \
     M(Milliseconds, async_insert_busy_timeout_ms, 200, "Maximum time to wait before dumping collected data per query since the first data appeared", 0) \
+    M(Milliseconds, async_insert_poll_timeout_ms, 10, "Timeout for polling data from asynchronous insert queue", 0) \
     \
     M(UInt64, remote_fs_read_max_backoff_ms, 10000, "Max wait time when trying to read data for remote disk", 0) \
     M(UInt64, remote_fs_read_backoff_max_tries, 5, "Max attempts to read with backoff", 0) \

src/Interpreters/AsynchronousInsertQueue.cpp

@@ -430,7 +430,7 @@ void AsynchronousInsertQueue::processBatchDeadlines(size_t shard_num)
             std::unique_lock lock(shard.mutex);
 
             shard.are_tasks_available.wait_for(lock,
-                Milliseconds(getContext()->getSettingsRef().async_insert_busy_timeout_ms), [&shard, this]
+                Milliseconds(getContext()->getSettingsRef().async_insert_poll_timeout_ms), [&shard, this]
             {
                 if (shutdown)
                     return true;

src/Interpreters/Context.cpp

@@ -4867,6 +4867,9 @@ void Context::setAsynchronousInsertQueue(const std::shared_ptr<AsynchronousInser
     if (std::chrono::milliseconds(settings.async_insert_busy_timeout_ms) == 0ms)
         throw Exception(ErrorCodes::INVALID_SETTING_VALUE, "Setting async_insert_busy_timeout_ms can't be zero");
 
+    if (std::chrono::milliseconds(settings.async_insert_poll_timeout_ms) == 0ms)
+        throw Exception(ErrorCodes::INVALID_SETTING_VALUE, "Setting async_insert_poll_timeout_ms can't be zero");
+
     shared->async_insert_queue = ptr;
 }