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1 | <?php |
2 | /** |
3 | * Show some statistics on the blob_orphans table, created with trackBlobs.php. |
4 | * |
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. |
9 | * |
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. |
14 | * |
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 |
19 | * |
20 | * @file |
21 | * @ingroup Maintenance ExternalStorage |
22 | */ |
23 | |
24 | require_once __DIR__ . '/../Maintenance.php'; |
25 | |
26 | /** |
27 | * Maintenance script that shows some statistics on the blob_orphans table, |
28 | * created with trackBlobs.php. |
29 | * |
30 | * @ingroup Maintenance ExternalStorage |
31 | */ |
32 | class OrphanStats extends Maintenance { |
33 | public function __construct() { |
34 | parent::__construct(); |
35 | $this->addDescription( |
36 | "Show some statistics on the blob_orphans table, created with trackBlobs.php" ); |
37 | } |
38 | |
39 | protected function getExternalDB( $db, $cluster ) { |
40 | $lbFactory = $this->getServiceContainer()->getDBLoadBalancerFactory(); |
41 | $lb = $lbFactory->getExternalLB( $cluster ); |
42 | |
43 | return $lb->getMaintenanceConnectionRef( $db ); |
44 | } |
45 | |
46 | public function execute() { |
47 | if ( !$this->getDB( DB_PRIMARY )->tableExists( 'blob_orphans', __METHOD__ ) ) { |
48 | $this->fatalError( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first" ); |
49 | } |
50 | $dbr = $this->getReplicaDB(); |
51 | $res = $dbr->newSelectQueryBuilder() |
52 | ->select( '*' ) |
53 | ->from( 'blob_orphans' ) |
54 | ->caller( __METHOD__ )->fetchResultSet(); |
55 | |
56 | $num = 0; |
57 | $totalSize = 0; |
58 | $hashes = []; |
59 | $maxSize = 0; |
60 | |
61 | foreach ( $res as $row ) { |
62 | $extDB = $this->getExternalDB( DB_REPLICA, $row->bo_cluster ); |
63 | $blobRow = $extDB->newSelectQueryBuilder() |
64 | ->select( '*' ) |
65 | ->from( 'blobs' ) |
66 | ->where( [ 'blob_id' => $row->bo_blob_id ] ) |
67 | ->caller( __METHOD__ )->fetchRow(); |
68 | |
69 | $num++; |
70 | $size = strlen( $blobRow->blob_text ); |
71 | $totalSize += $size; |
72 | $hashes[sha1( $blobRow->blob_text )] = true; |
73 | $maxSize = max( $size, $maxSize ); |
74 | } |
75 | unset( $res ); |
76 | |
77 | $this->output( "Number of orphans: $num\n" ); |
78 | if ( $num > 0 ) { |
79 | $this->output( "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" . |
80 | "Max size: $maxSize\n" . |
81 | "Number of unique texts: " . count( $hashes ) . "\n" ); |
82 | } |
83 | } |
84 | } |
85 | |
86 | $maintClass = OrphanStats::class; |
87 | require_once RUN_MAINTENANCE_IF_MAIN; |