How do I kill all the processes in Mysql “show processlist”?

Question

Because I see a lot of processes there, and the \"time\" column shows big values for all of them.

Answer 1

You need to kill them one by one, MySQL does not have any massive kill command. You can script it in any language, for example in PHP you can use something like:

$result = mysql_query("SHOW FULL PROCESSLIST");
while ($row=mysql_fetch_array($result)) {
  $process_id=$row["Id"];
  if ($row["Time"] > 200 ) {
    $sql="KILL $process_id";
    mysql_query($sql);
  }
}