Expire project caches once per push instead of once per ref

Previously `ProjectCacheWorker` would be scheduled once per ref, which
would generate unnecessary I/O and load on Sidekiq, especially if many
tags or branches were pushed at once. `ProjectCacheWorker` would expire
three items:

1. Repository size: This only needs to be updated once per push.
2. Commit count: This only needs to be updated if the default branch
   is updated.
3. Project method caches: This only needs to be updated if the default
   branch changes, but only if certain files change (e.g. README,
   CHANGELOG, etc.).

Because the third item requires looking at the actual changes in the
commit deltas, we schedule one `ProjectCacheWorker` to handle the first
two cases, and schedule a separate `ProjectCacheWorker` for the third
case if it is needed. As a result, this brings down the number of
`ProjectCacheWorker` jobs from N to 2.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/52046

1 files changed, 5 insertions, 7 deletions

diff --git a/app/services/git/base_hooks_service.rb b/app/services/git/base_hooks_service.rb
index 1db18fcf401..3fd38444196 100644
--- a/app/services/git/base_hooks_service.rb
+++ b/app/services/git/base_hooks_service.rb
@@ -8,8 +8,6 @@ module Git
     PROCESS_COMMIT_LIMIT = 100
 
     def execute
-      project.repository.after_create if project.empty_repo?
-
       create_events
       create_pipelines
       execute_project_hooks
@@ -70,11 +68,11 @@ module Git
     end
 
     def enqueue_invalidate_cache
-      ProjectCacheWorker.perform_async(
-        project.id,
-        invalidated_file_types,
-        [:commit_count, :repository_size]
-      )
+      file_types = invalidated_file_types
+
+      return unless file_types.present?
+
+      ProjectCacheWorker.perform_async(project.id, file_types, [], false)
     end
 
     def base_params