1 files changed, 87 insertions, 0 deletions
diff --git a/www/wiki/maintenance/storage/orphanStats.php b/www/wiki/maintenance/storage/orphanStats.php
new file mode 100644
index 00000000..219b47c4
--- /dev/null
+++ b/www/wiki/maintenance/storage/orphanStats.php
@@ -0,0 +1,87 @@
+<?php
+/**
+ * Show some statistics on the blob_orphans table, created with trackBlobs.php.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Maintenance ExternalStorage
+ */
+
+require_once __DIR__ . '/../Maintenance.php';
+
+use MediaWiki\MediaWikiServices;
+
+/**
+ * Maintenance script that shows some statistics on the blob_orphans table,
+ * created with trackBlobs.php.
+ *
+ * @ingroup Maintenance ExternalStorage
+ */
+class OrphanStats extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->addDescription(
+			"Show some statistics on the blob_orphans table, created with trackBlobs.php" );
+	}
+
+	protected function &getDB( $cluster, $groups = [], $wiki = false ) {
+		$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
+		$lb = $lbFactory->getExternalLB( $cluster );
+
+		return $lb->getConnection( DB_REPLICA );
+	}
+
+	public function execute() {
+		$dbr = $this->getDB( DB_REPLICA );
+		if ( !$dbr->tableExists( 'blob_orphans' ) ) {
+			$this->fatalError( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first" );
+		}
+		$res = $dbr->select( 'blob_orphans', '*', '', __METHOD__ );
+
+		$num = 0;
+		$totalSize = 0;
+		$hashes = [];
+		$maxSize = 0;
+
+		foreach ( $res as $boRow ) {
+			$extDB = $this->getDB( $boRow->bo_cluster );
+			$blobRow = $extDB->selectRow(
+				'blobs',
+				'*',
+				[ 'blob_id' => $boRow->bo_blob_id ],
+				__METHOD__
+			);
+
+			$num++;
+			$size = strlen( $blobRow->blob_text );
+			$totalSize += $size;
+			$hashes[sha1( $blobRow->blob_text )] = true;
+			$maxSize = max( $size, $maxSize );
+		}
+		unset( $res );
+
+		$this->output( "Number of orphans: $num\n" );
+		if ( $num > 0 ) {
+			$this->output( "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" .
+				"Max size: $maxSize\n" .
+				"Number of unique texts: " . count( $hashes ) . "\n" );
+		}
+	}
+}
+
+$maintClass = OrphanStats::class;
+require_once RUN_MAINTENANCE_IF_MAIN;