3 * Show some statistics on the blob_orphans table, created with trackBlobs.php.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
21 * @ingroup Maintenance ExternalStorage
24 require_once __DIR__
. '/../Maintenance.php';
26 use MediaWiki\MediaWikiServices
;
29 * Maintenance script that shows some statistics on the blob_orphans table,
30 * created with trackBlobs.php.
32 * @ingroup Maintenance ExternalStorage
34 class OrphanStats
extends Maintenance
{
35 public function __construct() {
36 parent
::__construct();
37 $this->addDescription(
38 "Show some statistics on the blob_orphans table, created with trackBlobs.php" );
41 protected function &getDB( $cluster, $groups = [], $wiki = false ) {
42 $lbFactory = MediaWikiServices
::getInstance()->getDBLoadBalancerFactory();
43 $lb = $lbFactory->getExternalLB( $cluster );
45 return $lb->getConnection( DB_REPLICA
);
48 public function execute() {
49 $dbr = $this->getDB( DB_REPLICA
);
50 if ( !$dbr->tableExists( 'blob_orphans' ) ) {
51 $this->fatalError( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first" );
53 $res = $dbr->select( 'blob_orphans', '*', '', __METHOD__
);
60 foreach ( $res as $boRow ) {
61 $extDB = $this->getDB( $boRow->bo_cluster
);
62 $blobRow = $extDB->selectRow(
65 [ 'blob_id' => $boRow->bo_blob_id
],
70 $size = strlen( $blobRow->blob_text
);
72 $hashes[sha1( $blobRow->blob_text
)] = true;
73 $maxSize = max( $size, $maxSize );
77 $this->output( "Number of orphans: $num\n" );
79 $this->output( "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" .
80 "Max size: $maxSize\n" .
81 "Number of unique texts: " . count( $hashes ) . "\n" );
86 $maintClass = OrphanStats
::class;
87 require_once RUN_MAINTENANCE_IF_MAIN
;