From 7ed521c3dca929d4459f73ee7ebcefc2da0c0599 Mon Sep 17 00:00:00 2001
From: sarayourfriend <24264157+sarayourfriend@users.noreply.github.com>
Date: Wed, 15 Nov 2023 10:03:35 +1100
Subject: [PATCH] Add gc debugging flag to help debug prod thumbnails leak
 (#3354)

* Add gc debugging flag to help debug prod thumbnails leak

* Add documentation to the new environment variable

* Simplify setting aggregation
---
 api/conf/asgi.py             | 10 ++++++++++
 api/conf/settings/logging.py |  6 ++++++
 2 files changed, 16 insertions(+)

diff --git a/api/conf/asgi.py b/api/conf/asgi.py
index 39cf52c8d4b..2efa17b95c3 100644
--- a/api/conf/asgi.py
+++ b/api/conf/asgi.py
@@ -20,3 +20,13 @@ def get_asgi_application():
 
 if settings.ENVIRONMENT == "local":
     static_files_application = ASGIStaticFilesHandler(application)
+
+
+if settings.GC_DEBUG_LOGGING:
+    import gc
+
+    setting = 0
+    for flag in settings.GC_DEBUG_LOGGING:
+        setting |= getattr(gc, flag)
+
+    gc.set_debug(setting)
diff --git a/api/conf/settings/logging.py b/api/conf/settings/logging.py
index df0979b75f2..a8ae2a842cb 100644
--- a/api/conf/settings/logging.py
+++ b/api/conf/settings/logging.py
@@ -14,6 +14,12 @@ def health_check_filter(record: LogRecord) -> bool:
 LOG_LEVEL = config("LOG_LEVEL", default="INFO").upper()
 DJANGO_DB_LOGGING = config("DJANGO_DB_LOGGING", cast=bool, default=False)
 
+# Set to a pipe-delimited string of gc debugging flags
+# https://docs.python.org/3/library/gc.html#gc.DEBUG_STATS
+GC_DEBUG_LOGGING = config(
+    "GC_DEBUG_LOGGING", cast=lambda x: x.split("|") if x else [], default=""
+)
+
 # https://github.com/dabapps/django-log-request-id#logging-all-requests
 LOG_REQUESTS = True