fix

example.env

@@ -80,6 +80,13 @@ OXICLOUD_SERVER_HOST=127.0.0.1
 # higher = less background DB work. Minimum enforced: 30s.
 #OXICLOUD_STORAGE_USAGE_RECONCILE_SECS=600
 
+# How often (milliseconds) the background job drains storage.tree_etag_dirty
+# and bumps folder tree ETags (default: 500). Write paths only enqueue bump
+# requests — this is the upper bound on how stale an ancestor folder's ETag
+# (WebDAV/NextCloud collection sync signal) can be after a change. Lower =
+# fresher sync detection, higher = fewer background UPDATEs. Minimum: 100.
+#OXICLOUD_TREE_ETAG_FLUSH_MS=500
+
 # Allow multiple processes to bind to the same port (SO_REUSEPORT).
 # DISABLED by default — leaving this off means a second accidental instance
 # will fail immediately with "address already in use", which is the safe behaviour.