From 03a98aff3c4803b163802b784e05f1eacd03c444 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Mon, 12 Sep 2016 14:26:03 +0100
Subject: [PATCH] Create new index concurrently

---
 synapse/storage/state.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/storage/state.py b/synapse/storage/state.py
index f98d5d53ee..fdbdade536 100644
--- a/synapse/storage/state.py
+++ b/synapse/storage/state.py
@@ -820,7 +820,7 @@ class StateStore(SQLBaseStore):
         def reindex_txn(txn):
             if isinstance(self.database_engine, PostgresEngine):
                 txn.execute(
-                    "CREATE INDEX state_groups_state_type_idx"
+                    "CREATE INDEX CONCURRENTLY state_groups_state_type_idx"
                     " ON state_groups_state(state_group, type, state_key)"
                 )
                 txn.execute(