Allow config Sidekiq worker memory limit in ENV

app/workers/gitlab/github_import/stage/finish_import_worker.rb

@@ -8,6 +8,10 @@ module Gitlab
         include GithubImport::Queue
         include StageMethods
 
+        # technical debt: https://gitlab.com/gitlab-org/gitlab/issues/33991
+        sidekiq_options memory_killer_memory_growth_kb: ENV.fetch('MEMORY_KILLER_FINISH_IMPORT_WORKER_MEMORY_GROWTH_KB', 50).to_i
+        sidekiq_options memory_killer_max_memory_growth_kb: ENV.fetch('MEMORY_KILLER_FINISH_IMPORT_WORKER_MAX_MEMORY_GROWTH_KB', 200_000).to_i
+
         # project - An instance of Project.
         def import(_, project)
           project.after_import

app/workers/gitlab/github_import/stage/import_repository_worker.rb

@@ -8,6 +8,10 @@ module Gitlab
         include GithubImport::Queue
         include StageMethods
 
+        # technical debt: https://gitlab.com/gitlab-org/gitlab/issues/33991
+        sidekiq_options memory_killer_memory_growth_kb: ENV.fetch('MEMORY_KILLER_IMPORT_REPOSITORY_WORKER_MEMORY_GROWTH_KB', 50).to_i
+        sidekiq_options memory_killer_max_memory_growth_kb: ENV.fetch('MEMORY_KILLER_IMPORT_REPOSITORY_WORKER_MAX_MEMORY_GROWTH_KB', 300_000).to_i
+
         # client - An instance of Gitlab::GithubImport::Client.
         # project - An instance of Project.
         def import(client, project)

app/workers/repository_import_worker.rb

@@ -6,6 +6,10 @@ class RepositoryImportWorker
   include ProjectStartImport
   include ProjectImportOptions
 
+  # technical debt: https://gitlab.com/gitlab-org/gitlab/issues/33991
+  sidekiq_options memory_killer_memory_growth_kb: ENV.fetch('MEMORY_KILLER_REPOSITORY_IMPORT_WORKER_MEMORY_GROWTH_KB', 50).to_i
+  sidekiq_options memory_killer_max_memory_growth_kb: ENV.fetch('MEMORY_KILLER_REPOSITORY_IMPORT_WORKER_MAX_MEMORY_GROWTH_KB', 300_000).to_i
+
   def perform(project_id)
     @project = Project.find(project_id)