Add more logging to debug slow startup (#8264)

I'm hoping this will provide some pointers for debugging
https://github.com/matrix-org/synapse/issues/7968.

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/storage/databases/main/__init__.py b/synapse/storage/databases/main/__init__.py

index 99890ffbf3..b315ae66d2 100644
--- a/synapse/storage/databases/main/__init__.py
+++ b/synapse/storage/databases/main/__init__.py
@@ -591,6 +591,7 @@ def check_database_before_upgrade(cur, database_engine, config: HomeServerConfig
     """Called before upgrading an existing database to check that it is broadly sane
     compared with the configuration.
     """
+    logger.info("Running sanity-checks on database...")
     domain = config.server_name
 
     sql = database_engine.convert_param_style(