From 5e1997f491163467ae78975cf954f8f63a5f4bf8 Mon Sep 17 00:00:00 2001
From: Ryan Lane <laner@users.mediawiki.org>
Date: Sun, 26 Dec 2010 19:45:01 +0000
Subject: [PATCH] Adding maintenance script to purge stale flagged revs entries
 from memcached (for entries that have rev idsin the key). Should be made more
 generic.

---
 .../purgeStaleMemcachedFlaggedRevs.php        | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 maintenance/purgeStaleMemcachedFlaggedRevs.php

diff --git a/maintenance/purgeStaleMemcachedFlaggedRevs.php b/maintenance/purgeStaleMemcachedFlaggedRevs.php
new file mode 100644
index 0000000000..679c1fb429
--- /dev/null
+++ b/maintenance/purgeStaleMemcachedFlaggedRevs.php
@@ -0,0 +1,39 @@
+<?php
+
+require_once( dirname( __FILE__ ) . '/commandLine.inc' );
+
+function purgeStaleMemcachedText() {
+	global $wgMemc, $wgDBname;
+	$db = wfGetDB( DB_MASTER );
+	$maxTextId = $db->selectField( 'text', 'max(old_id)' );
+	$latestReplicatedTextId = $db->selectField( array( 'recentchanges', 'revision' ), 'rev_text_id', 
+		array( 'rev_id = rc_this_oldid', "rc_timestamp < '20101225183000'"),  'purgeStaleMemcachedText', 
+		array( 'ORDER BY' => 'rc_timestamp DESC' ) );
+	$latestReplicatedTextId -= 100; # A bit of paranoia
+
+	echo "Going to purge text entries from $latestReplicatedTextId to $maxTextId in $wgDBname\n";
+
+	for ( $i = $latestReplicatedTextId; $i < $maxTextId; $i++ ) {
+		$keys = array();
+		$keys[] = wfMemcKey( 'flaggedrevs', 'countPending', $i );
+		$keys[] = wfMemcKey( 'flaggedrevs', 'includesSynced', $i );
+		$keys[] = wfMemcKey( 'flaggedrevs', 'overrideRedirect', $i );
+		$keys[] = wfMemcKey( 'unreviewedPages', 'underReview', $i );
+
+		foreach ( $keys as $key ) {
+			while (1) {
+				if (! $wgMemc->delete( $key ) ) {
+					echo "Memcache delete for $key returned false\n";
+				}
+				if ( $wgMemc->get( $key ) ) {
+					echo "There's still content in $key!\n";
+				} else {
+					break;
+				}
+			}
+		}
+	}
+}
+
+purgeStaleMemcachedText();
+
-- 
2.20.1