From 433ded5bda7adf5a131da54dd9d570a27eeed029 Mon Sep 17 00:00:00 2001
From: Domas Mituzas <midom@users.mediawiki.org>
Date: Sat, 25 Feb 2006 13:47:11 +0000
Subject: [PATCH] allow to disable schema checks  - those acquire giant locks
 on table opens..

---
 includes/DefaultSettings.php | 2 ++
 includes/Image.php           | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index ddbd9cc261..c99bbd7a5a 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -432,6 +432,8 @@ $wgDBprefix         = '';
 $wgDBschema	    = 'mediawiki';
 /**#@-*/
 
+/** Live high performance sites should disable this - some checks acquire giant mysql locks */
+$wgCheckDBSchema = true;
 
 
 /**
diff --git a/includes/Image.php b/includes/Image.php
index 8d62b2faa0..96e892fc2f 100644
--- a/includes/Image.php
+++ b/includes/Image.php
@@ -1244,6 +1244,10 @@ class Image
 	}
 
 	function checkDBSchema(&$db) {
+                global $wgCheckDBSchema;
+		if (!$wgCheckDBSchema) {
+			return;
+		}
 		# img_name must be unique
 		if ( !$db->indexUnique( 'image', 'img_name' ) && !$db->indexExists('image','PRIMARY') ) {
 			wfDebugDieBacktrace( 'Database schema not up to date, please run maintenance/archives/patch-image_name_unique.sql' );
-- 
2.20.1