MediaWiki  1.23.12
orphanStats.php
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1 <?php
24 require_once __DIR__ . '/../Maintenance.php';
25 
32 class OrphanStats extends Maintenance {
33  public function __construct() {
34  parent::__construct();
35  $this->mDescription = "how some statistics on the blob_orphans table, created with trackBlobs.php";
36  }
37 
38  protected function &getDB( $cluster, $groups = array(), $wiki = false ) {
39  $lb = wfGetLBFactory()->getExternalLB( $cluster );
40  return $lb->getConnection( DB_SLAVE );
41  }
42 
43  public function execute() {
44  $dbr = wfGetDB( DB_SLAVE );
45  if ( !$dbr->tableExists( 'blob_orphans' ) ) {
46  $this->error( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first", true );
47  }
48  $res = $dbr->select( 'blob_orphans', '*', false, __METHOD__ );
49 
50  $num = 0;
51  $totalSize = 0;
52  $hashes = array();
53  $maxSize = 0;
54 
55  foreach ( $res as $boRow ) {
56  $extDB = $this->getDB( $boRow->bo_cluster );
57  $blobRow = $extDB->selectRow( 'blobs', '*', array( 'blob_id' => $boRow->bo_blob_id ), __METHOD__ );
58 
59  $num++;
60  $size = strlen( $blobRow->blob_text );
61  $totalSize += $size;
62  $hashes[ sha1( $blobRow->blob_text ) ] = true;
63  $maxSize = max( $size, $maxSize );
64  }
65  unset( $res );
66 
67  $this->output( "Number of orphans: $num\n" );
68  if ( $num > 0 ) {
69  $this->output( "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" .
70  "Max size: $maxSize\n" .
71  "Number of unique texts: " . count( $hashes ) . "\n" );
72  }
73  }
74 }
75 
76 $maintClass = "OrphanStats";
77 require_once RUN_MAINTENANCE_IF_MAIN;
php
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Definition: skin.txt:62
OrphanStats\getDB
& getDB( $cluster, $groups=array(), $wiki=false)
Returns a database to be used by current maintenance script.
Definition: orphanStats.php:38
wfGetDB
& wfGetDB( $db, $groups=array(), $wiki=false)
Get a Database object.
Definition: GlobalFunctions.php:3706
RUN_MAINTENANCE_IF_MAIN
require_once RUN_MAINTENANCE_IF_MAIN
Definition: maintenance.txt:50
Maintenance
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: maintenance.txt:39
OrphanStats\__construct
__construct()
Default constructor.
Definition: orphanStats.php:33
$dbr
$dbr
Definition: testCompression.php:48
$lb
if( $wgAPIRequestLog) $lb
Definition: api.php:126
array
the array() calling protocol came about after MediaWiki 1.4rc1.
List of Api Query prop modules.
OrphanStats
Maintenance script that shows some statistics on the blob_orphans table, created with trackBlobs....
Definition: orphanStats.php:32
$size
$size
Definition: RandomTest.php:75
DB_SLAVE
const DB_SLAVE
Definition: Defines.php:55
wfGetLBFactory
& wfGetLBFactory()
Get the load balancer factory object.
Definition: GlobalFunctions.php:3725
as
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Definition: distributors.txt:9
Maintenance\error
error( $err, $die=0)
Throw an error to the user.
Definition: Maintenance.php:333
Maintenance\output
output( $out, $channel=null)
Throw some output to the user.
Definition: Maintenance.php:314
$hashes
$hashes
Definition: testCompression.php:62
$res
$res
Definition: database.txt:21
OrphanStats\execute
execute()
Do the actual work.
Definition: orphanStats.php:43
$maintClass
$maintClass
Definition: orphanStats.php:76