blob: afea815e785033f9e2f4a474518d459757718069 (
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<?php
/**
* Show some statistics on the blob_orphans table, created with trackBlobs.php
*/
require_once( dirname(__FILE__).'/../commandLine.inc' );
$stats = new OrphanStats;
$stats->execute();
class OrphanStats {
function getDB( $cluster ) {
$lb = wfGetLBFactory()->getExternalLB( $cluster );
return $lb->getConnection( DB_SLAVE );
}
function execute() {
$extDBs = array();
$dbr = wfGetDB( DB_SLAVE );
$res = $dbr->select( 'blob_orphans', '*', false, __METHOD__ );
$num = 0;
$totalSize = 0;
$hashes = array();
$maxSize = 0;
foreach ( $res as $boRow ) {
$extDB = $this->getDB( $boRow->bo_cluster );
$blobRow = $extDB->selectRow( 'blobs', '*', array( 'blob_id' => $boRow->bo_blob_id ), __METHOD__ );
$num++;
$size = strlen( $blobRow->blob_text );
$totalSize += $size;
$hashes[ sha1( $blobRow->blob_text ) ] = true;
$maxSize = max( $size, $maxSize );
}
unset( $res );
echo "Number of orphans: $num\n";
if ( $num > 0 ) {
echo "Average size: " . round( $totalSize / $num, 0 ) . " bytes\n" .
"Max size: $maxSize\n" .
"Number of unique texts: " . count( $hashes ) . "\n";
}
}
}
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