00001 <?php 00002 00023 require_once( dirname(__FILE__) . '/../Maintenance.php' ); 00024 00025 class OrphanStats extends Maintenance { 00026 public function __construct() { 00027 parent::__construct(); 00028 $this->mDescription = "how some statistics on the blob_orphans table, created with trackBlobs.php"; 00029 } 00030 00031 private function getDB( $cluster ) { 00032 $lb = wfGetLBFactory()->getExternalLB( $cluster ); 00033 return $lb->getConnection( DB_SLAVE ); 00034 } 00035 00036 public function execute() { 00037 $extDBs = array(); 00038 $dbr = wfGetDB( DB_SLAVE ); 00039 if( !$dbr->tableExists( 'blob_orphans' ) ) { 00040 $this->error( "blob_orphans doesn't seem to exist, need to run trackBlobs.php first", true ); 00041 } 00042 $res = $dbr->select( 'blob_orphans', '*', false, __METHOD__ ); 00043 00044 $num = 0; 00045 $totalSize = 0; 00046 $hashes = array(); 00047 $maxSize = 0; 00048 00049 foreach ( $res as $boRow ) { 00050 $extDB = $this->getDB( $boRow->bo_cluster ); 00051 $blobRow = $extDB->selectRow( 'blobs', '*', array( 'blob_id' => $boRow->bo_blob_id ), __METHOD__ ); 00052 00053 $num++; 00054 $size = strlen( $blobRow->blob_text ); 00055 $totalSize += $size; 00056 $hashes[ sha1( $blobRow->blob_text ) ] = true; 00057 $maxSize = max( $size, $maxSize ); 00058 } 00059 unset( $res ); 00060 00061 $this->output( "Number of orphans: $num\n" ); 00062 if ( $num > 0 ) { 00063 $this->output( "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" . 00064 "Max size: $maxSize\n" . 00065 "Number of unique texts: " . count( $hashes ) . "\n" ); 00066 } 00067 } 00068 } 00069 00070 $maintClass = "OrphanStats"; 00071 require_once( DO_MAINTENANCE );