PHP+mysql插入大量数据的时候卡死，求大神

$msql = "";
foreach ($rlist as $i=>$rs){
$r_id = $rs['id'];
$msql .= "('{$r_id}'),";
if ($i>0 && !$i%1000){
$sqls = "INSERT INTO tb_mail( r_id) VALUES ";
$msql = rtrim($msql,',');
self::query($sqls);
$msql = "";
}
}
@林_旻

$dsql = "INSERT INTO tb_mail( r_id) VALUES ";
foreach ($rlist as $i=>$rs){
$r_id = $rs['id'];
$msql .= "('{$r_id}'),";
if ($i>0 && !$i%1000){
$sqls = $dsql .$msql;
$sqls = rtrim($sqls,',');
self::query($sqls);
$msql = "";
}
}
if( $msql){
$sqls = $dsql .$msql;
$sqls = rtrim($sqls,',');
self::query($sqls);
}
//后面还有执行一次才行
@林_旻