数据库连接单例问题

\Illuminate\Support\Facades\DB::purge();Copy

    $size = 10;
    $pool = new \Swoole\Database\PDOPool((new \Swoole\Database\PDOConfig)
        ->withHost(config('database.connections.mysql.host'))
        ->withPort(config('database.connections.mysql.port'))
        // ->withUnixSocket('/tmp/mysql.sock')
        ->withDbName(config('database.connections.mysql.database'))
        ->withCharset(config('database.connections.mysql.charset'))
        ->withUsername(config('database.connections.mysql.username'))
        ->withPassword(config('database.connections.mysql.password'))
        ,$size);
    //填充连接
    $pool->fill();
    while(条件){
           go(function(){
                   $pdo = $pool->get();
                   // TODO
                  $pool->put($pdo);
           })
    }Copy