今天，我的网站托管突然被我的服务提供商暂停了。我需要帮助来查找实际导致问题的原因。他们向我发送了以下共享的日志。
暂停原因：MYSQL使用率高 这是您的MYSQL高使用率日志；
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1663045
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1663674
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1664163
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1664518
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1665183
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1675598
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1676464
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1676932
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1677146
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1708438
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1789011
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1800685
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1816150
ncgtjnoe_begreen
localhost
ncgtjnoe_crmbegreen
Sleep
4
NULL
1824685
ijnxqsbq_boltlgu
localhost
ijnxqsbq_boltlgu
Sleep
95
NULL
1825121
ijnxqsbq_boltlgu
localhost
ijnxqsbq_boltlgu
Sleep
18
NULL
1825190
ijnxqsbq_boltlgu
localhost
ijnxqsbq_boltlgu
Sleep
4
NULL
1825191
ijnxqsbq_boltlgu
localhost
ijnxqsbq_boltlgu
Sleep
3
NULL
是什么导致高使用率，我怀疑我在使用长池进行推送通知，这导致了问题。
这是网站每一页上使用的通知的代码。
<script type="text/javascript">
function poll() {
var ajax = new XMLHttpRequest();
ajax.onreadystatechange = function() {
if (this.readyState === 4 && this.status === 200) {
if (this.status === 200) {
try {
var json = JSON.parse(this.responseText); //alert('changed');
} catch {
setTimeout(poll,55000);return;
}
if (json.status !== true) {
alert(json.error);return;
}
var data = json.data;
for (var i = 0, len = data.length; i < len; i++) {
var x = data[i];
var body = 'Task: ' + x.content + '\nDate: ' + x.time + '\nID: ' + x.id;
notifyMe(body,x.id);
}
setTimeout(poll,55000);
} else {
setTimeout(poll,55000);
}
}
}
ajax.open('GET', 'long-polling.php', true);
ajax.send();
}
setTimeout(poll,60000);
//var body1 = "This is the body of the notification asargument";
function notifyMe(body1,id) {
// Let's check if the browser supports notifications
if (!("Notification" in window)) {
alert("This browser does not support desktop notification");
}
// Let's check if the user is okay to get some notification
else if (Notification.permission === "granted") {
// If it's okay let's create a notification
var options = {
body: body1,
icon: "icon.png",
dir : "ltr"
};
var notification = new Notification("Task Alert",options);
notification.addEventListener("click", function() {
window.open('opentask.php?id='+id, '_blank');
window.focus();
this.close();
// Do something cool
}, {once : true});
}
// Otherwise, we need to ask the user for permission
// Note, Chrome does not implement the permission static property
// So we have to check for NOT 'denied' instead of 'default'
else if (Notification.permission !== 'denied') {
Notification.requestPermission(function (permission) {
// Whatever the user answers, we make sure we store the information
if (!('permission' in Notification)) {
Notification.permission = permission;
}
// If the user is okay, let's create a notification
if (permission === "granted") {
var options = {
body: "Notifications enabled",
icon: "icon.png",
dir : "ltr"
};
var notification = new Notification("Notification",options);
}
});
}
// At last, if the user already denied any notification, and you
// want to be respectful there is no need to bother them any more.
}
</script>
这是long-polling.php文件的代码
<?php
//session_start();
session_write_close();
ignore_user_abort(false);
set_time_limit(40);
try {
include_once '../config.php';
if ($_COOKIE['notifyEnabled']==0) {
// echo "<script>alert('Helow');</script>";
$user = $_COOKIE['loggedinid'];
// add user to the database
$mysqli -> query("INSERT INTO tasks_update_track VALUES ($user, 0)");
// send to the browser
setcookie('notifyEnabled', 1);
$_COOKIE['notifyEnabled']=1;
// first request does not do anything than creating the cookie
exit();
}
// get the user value
$user = $_COOKIE['loggedinid'];
while (true) {
// select new rows
$result = $mysqli -> query("SELECT t.id, t.title, t.description , t.reminder FROM tasks t INNER JOIN tasks_update_track ud ON ud.last_sent_id < t.id WHERE ud.user_id = $user AND t.responsibleperson=$user ORDER BY t.id");
// check whether there were new rows in above query
if ($result && $result -> num_rows) {
//if yes, makes the output
$output = [];
// this is used to update the db_user_data table at last. As rows are ordered by t.id in ascending order in above query, last row has the last Id
$lastId = 0;
foreach ($result as $row) {
$output[] = [
'content' => $row['title'],
'id' => $row['id'],
'time' => $row['reminder']];
$lastId = $row['id'];
}
// update the table and set last_sent_id to the last sent row id of other table.
$mysqli -> query("UPDATE tasks_update_track SET last_sent_id = $lastId WHERE user_id = $user");
echo json_encode([
'status' => true,
'data' => $output
]);
exit;
}
// db queries are heavy. So 2 seconds
sleep(5);
}
} catch (Exception $e) {
exit(
json_encode(
array (
'status' => false,
'error' => $e -> getMessage()
)
)
);
}