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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 | // @codeCoverageIgnoreStart |
| 25 | require_once __DIR__ . '/../Maintenance.php'; |
| 26 | // @codeCoverageIgnoreEnd |
| 27 | |
| 28 | /** |
| 29 | * Maintenance script that shows some statistics on the blob_orphans table, |
| 30 | * created with trackBlobs.php. |
| 31 | * |
| 32 | * @ingroup Maintenance ExternalStorage |
| 33 | */ |
| 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" ); |
| 39 | } |
| 40 | |
| 41 | protected function getExternalDB( $db, $cluster ) { |
| 42 | $lbFactory = $this->getServiceContainer()->getDBLoadBalancerFactory(); |
| 43 | $lb = $lbFactory->getExternalLB( $cluster ); |
| 44 | |
| 45 | return $lb->getMaintenanceConnectionRef( $db ); |
| 46 | } |
| 47 | |
| 48 | public function execute() { |
| 49 | if ( !$this->getDB( DB_PRIMARY )->tableExists( 'blob_orphans', __METHOD__ ) ) { |
| 50 | $this->fatalError( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first" ); |
| 51 | } |
| 52 | $dbr = $this->getReplicaDB(); |
| 53 | $res = $dbr->newSelectQueryBuilder() |
| 54 | ->select( '*' ) |
| 55 | ->from( 'blob_orphans' ) |
| 56 | ->caller( __METHOD__ )->fetchResultSet(); |
| 57 | |
| 58 | $num = 0; |
| 59 | $totalSize = 0; |
| 60 | $hashes = []; |
| 61 | $maxSize = 0; |
| 62 | |
| 63 | foreach ( $res as $row ) { |
| 64 | $extDB = $this->getExternalDB( DB_REPLICA, $row->bo_cluster ); |
| 65 | $blobRow = $extDB->newSelectQueryBuilder() |
| 66 | ->select( '*' ) |
| 67 | ->from( 'blobs' ) |
| 68 | ->where( [ 'blob_id' => $row->bo_blob_id ] ) |
| 69 | ->caller( __METHOD__ )->fetchRow(); |
| 70 | |
| 71 | $num++; |
| 72 | $size = strlen( $blobRow->blob_text ); |
| 73 | $totalSize += $size; |
| 74 | $hashes[sha1( $blobRow->blob_text )] = true; |
| 75 | $maxSize = max( $size, $maxSize ); |
| 76 | } |
| 77 | unset( $res ); |
| 78 | |
| 79 | $this->output( "Number of orphans: $num\n" ); |
| 80 | if ( $num > 0 ) { |
| 81 | $this->output( "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" . |
| 82 | "Max size: $maxSize\n" . |
| 83 | "Number of unique texts: " . count( $hashes ) . "\n" ); |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | // @codeCoverageIgnoreStart |
| 89 | $maintClass = OrphanStats::class; |
| 90 | require_once RUN_MAINTENANCE_IF_MAIN; |
| 91 | // @codeCoverageIgnoreEnd |