allow to disable schema checks - those acquire giant locks on table opens..

diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index ddbd9cc..c99bbd7 100644 (file)
--- 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 8d62b2f..96e892f 100644 (file)
--- 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' );