Increase MySQL batch size to 10,000.

This saves 30 seconds in populate_db runtime on MySQL.

(imported from commit 7fe483bf5f32cfa3d09db8ad7a9be79bd0a2a271)

zephyr/lib/bulk_create.py

@@ -5,7 +5,7 @@ def batch_bulk_create(cls, cls_list, batch_size=150):
     if "sqlite" not in settings.DATABASES["default"]["ENGINE"]:
         # We don't need a low batch size with mysql, but we do need
         # one to avoid "MySQL Server has gone away" errors
-        batch_size = 2000
+        batch_size = 10000
     while len(cls_list) > 0:
         current_batch = cls_list[0:batch_size]
         cls.objects.bulk_create(current_batch)