MediaWiki REL1_35
orphanStats.php
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1<?php
24require_once __DIR__ . '/../Maintenance.php';
25
27
34class 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 getDB( $cluster, $groups = [], $wiki = false ) {
42 $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
43 $lb = $lbFactory->getExternalLB( $cluster );
44
45 return $lb->getMaintenanceConnectionRef( DB_REPLICA );
46 }
47
48 public function execute() {
49 $dbr = $this->getDB( DB_REPLICA );
50 if ( !$dbr->tableExists( 'blob_orphans', __METHOD__ ) ) {
51 $this->fatalError( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first" );
52 }
53 $res = $dbr->select( 'blob_orphans', '*', '', __METHOD__ );
54
55 $num = 0;
56 $totalSize = 0;
57 $hashes = [];
58 $maxSize = 0;
59
60 foreach ( $res as $row ) {
61 $extDB = $this->getDB( $row->bo_cluster );
62 $blobRow = $extDB->selectRow(
63 'blobs',
64 '*',
65 [ 'blob_id' => $row->bo_blob_id ],
66 __METHOD__
67 );
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;
87require_once RUN_MAINTENANCE_IF_MAIN;
getDB()
const RUN_MAINTENANCE_IF_MAIN
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
output( $out, $channel=null)
Throw some output to the user.
addDescription( $text)
Set the description text.
fatalError( $msg, $exitCode=1)
Output a message and terminate the current script.
MediaWikiServices is the service locator for the application scope of MediaWiki.
Maintenance script that shows some statistics on the blob_orphans table, created with trackBlobs....
getDB( $cluster, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
__construct()
Default constructor.
execute()
Do the actual work.
$maintClass
const DB_REPLICA
Definition defines.php:25