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PHP - How Can You Estimate A Performance Specification Based On Entry Processes?
I'm looking at shared hosting provided by GoDaddy. On the shared hosting they offer, entry process limitations range from 100 to 125.
I was also told this by customer support:
Entry Processes are the number of connections your account can process simultaneously. Understanding what constitutes a connection is important, though, because it's not as straightforward as "the number of visitors on your website." Here's what constitutes as a connection:
Your website delivering data via HTTP Your hosting account transferring data via SSH A Cron job processing However, the connections are only counted while they're processing. As soon as they've finished, they no longer count as processes. For an example, if a visitor comes to your site and your home page takes .1 seconds to load and generates only one HTTP connection, that visitor counted as one process for .1 seconds. Even though that visitor is still "viewing your site," they no longer count as a connection until they do something else that generates another connection, like move to a new page. So what is an average user count that I can conclude? I don't want to think that "it's not possible" I just need to know what limitations I'm looking at. I'm also curious what kind of error would be generated if more than 100 or 125 people tried to access the server simulataneously. Or perhaps employ an access delay of some sort. Edited by moose-en-a-gant, 10 January 2015 - 09:59 PM. Similar TutorialsHi This should be pretty simple but I can't figure it out.
I want to create and simple forward to different URL based on the user entry.
For example.. If they enter ABC in the box they go to www.11.com if they enter ZXC in the box they go to www.22.com if they enter CCC they go to www.33.com If they enter anything else they get an error message.
Thanks for any help!!
Hi all, firstly apologies as this is a cross post from another forum and we have hit a block.. I am hoping that opening this up to another set of gurus we can get a resolution. What I am trying to achieve is this... I have 2 tables Main and FinancialYear. Main holds all data which I use a form to post the data to it..(all works fine). I use this code to create a drop down in the insert.php form. again this works. Code: [Select] <tr><td>Financial Year: xxxx/xxxx</td><td> <!-- pulls the data from the table variable to populate the dropdown menu --> <?php $database = 'Projects_Main'; $fintable = 'FinancialYear'; if (!mysql_connect($db_host, $db_user, $db_pwd)) die("Can't connect to database 'cos somethin' is wrong"); if (!mysql_select_db($database)) die("Can't select database"); $result = mysql_query("SELECT FinancialYear_id, FinancialYear FROM {$fintable} order by FinancialYear"); $options=""; while ($row=mysql_fetch_array($result)) { //$id=$row["FinancialYear_id"]; $thing=$row["FinancialYear"]; $options.="<OPTION VALUE=\"$thing\">".$thing.'</option>'; } ?> <SELECT NAME="FinancialYear"> <OPTION VALUE=0>Choose</OPTION> <?=$options?> </SELECT> </td></tr> What I have done is built another form which list all records in the database and creates an update url for every record that passes the field Project_id where i use $_get to retrieve the Project_id to retrieve the relevant data into the update.php form. I am able to populate the form with all the correct information BUT I am looking to introduce some dropdowns to aid updating the data and provide consistency to the data. . Code: [Select] // Connect to server and select database. mysql_connect("$host", "$username", "$password")or die("cannot connect"); mysql_select_db('Projects_Main')or die("cannot select DB"); // get value of id that sent from address bar $Project_id=$_GET['Project_id']; //define vars $FinancialYear=$_POST['FinancialYear']; // other vars defined here also.. about 30 // Retrieve data from database $sql="SELECT * FROM Main WHERE Project_id='$Project_id'"; $result=mysql_query($sql); $rows=mysql_fetch_array($result); ?> //update_record_ac.php posts the data to the dbase. <form name="form1" method="post" action="update_record_ac.php"> <center> <table> <tr><td><b>Store Details<b></td></tr> <tr><td>Financial Year:</td><td> // takes the data from $rows and present to form <input name="FinancialYear" type="text" id="FinancialYear" value="<?php echo $rows['FinancialYear']; ?>"> // this is where I need to create the drop down.. see my other comments in the post..... </td></tr> the financialYear table consists if the following; financialyear_id - pri, auto inc. ---- data format is 2010/2011, 2011/2012.... financialyear the main table contains 30 fields .. won't list em all... Project_id - pri, auto inc financialyear I need the drop down to pull the data from the financialyear table and then to present or focus on the currently stored data... so if the store value in the table Main is 2010/2011 if Ii was to select the update url in the list_record.php it will pull all the relevant data into update_record.php form. the financialyear field in the form should be a dropdown with all the financial years listed but the 2010/2011 is selected or focused. I still need to be able to change the entry and post this back to the table Main..... So the dropdown contains the list of years from the financialyear table but when the record is pulled from table main the year that is stored in table Main should be highlighted in the dropdown and I should be able to select a new record and post back to the table Main.. any thoughts... please don't slate for the cross post, I haven't sanatised the data at any stage. I know i'm open to injection attacks. and yes my code is a little dirty... all these will be rectified as i finalise the process and ensure the consept works. Thanks for taking the time to read and hopefully you are able to understand the requirement and are able to assist. thanks Balgrath I need to know if there is any standard to estimate the effort to create a page in Java vs PHP.
For example, if we need to build a login page. I understand there are many factors but trying to see if there is any standards to compare these 2 technology in terms of effort
Hi there,
I have a client who has a form on a php page that posts data to a script. That script process the post data and generates a pdf which comes back and is automatically downloaded in the user's browser. They would like to redirect the user to a separate page after this process is complete. I have tried redirecting by adding :
header( 'Location: http://www.yoursite.com/new_page.html' ) ;
here's my html form: <form action="contact2.php" method="post" target="_self" id="contactform"> <ol> <li> <label for="name2">Your Name <span class="red">*</span></label> <input id="name2" name="name2" class="text" /> </li> <li> <label for="youremail">Your email <span class="red">*</span></label> <input id="youremail" name="youremail" class="text" /> </li> <li> <label for="company2">Company</label> <input id="company2" name="company2" class="text" /> </li> <li> <label for="subject2">Subject</label> <input id="subject2" name="subject2" class="text" /> </li> <li> <label for="message2">Message <span class="red">*</span></label> <textarea id="message2" name="message2" rows="6" cols="50"></textarea> </li> <li class="buttons"> <input type="image" name="imageField" id="imageField" src="images/send.gif" /> </li> </ol> </form> Here's my php code: <?PHP global $_POST; $name = $_POST["name2"]; $youremail = $_POST["youremail"]; $company = $_POST["company2"]; $subject = $_POST["subject2"]; $message = $_POST["message2"]; $to = "ldemotts@market-johnson.com"; $subject = "Form Submission"; $headers = "From: $youremail\n"; $message = "A visitor to your site has filled out the following information.\n Name: $name2 Email Address: $youremail Company: $company2 Subject: $subject2 Message: $message2"; if (preg_match(' /[\r\n,;\'"]/ ', $_POST['youremail'])) { exit('Invalid Email Address'); } else { mail($to,$subject,$message,$headers); } ?> Hi all, I have been working on an intranet website for some time now, one of the features I have been working on is a very simple Game Server Control Panel, the panel simply Starts, Stops and restarts servers via the System command, executing .bat files on the server. All this is working perfectly, however what I am wanting to know is if it is possible to make a function so a user knows if a particular server is running? My thoughts are a Green Tick would be displayed next to the name of the server, telling the user the server is running, alternatively, a red cross would be displayed if the server is not running... Not really sure how difficult this would be, I assume some sort of query could be created requesting if a particular windows process is running, then the output would be an IF statement.... Any Advice? I have attached a picture below of the site just to give people an idea of what it looks like Thanks in advance! [attachment deleted by admin] Alright, wasn't quite sure how to summarize this in the title, but I want to: Check if a user status is "active" or not based on the UserName input. I have a table witch holds: Code: [Select] VarChar Username Var CharPassWord int Active Ted TedsPW 1 something like the above(assuming it formatted correctly. In my php script I will want to input a variable for Username to check for: inputUN in this example would be "Ted". $UserNameToCheck = $_GET['inputUN']; Then I want to check for that UserName in the database, if it exists, I want pull the value for the "Active" field for just that UserName and echo it. Thanks for any help. Hello, I am wondering if there is any way with PHP to get a list of the processes running on the client that hits the PHP server script. If that is not possible, is there a way I have have my PHP script do an 'exec' call on something that will do it? Thanks Mike These are the specs that come to mind, CPU, RAM, Storage, Bandwith
My question is this, once you know what the point of a website is, whether it is to host videos, design something with an editor, ecommerce, if I ask a costumer "How many people do you expect to be on your site?"
Is that a fair question? Or is that arbitrary or even rhetorical like "Duh... the maximum count"
I want to know based on what is being accessed whether it is the photos displayed on page, character count, flash / javascript, whatever... how can I estimate?
This is for assigning VPS's depending on the clients requirement
I am using php to upload a file to my server, and at the same time inserting the files name and url into my mysql database.
$sql = "UPDATE uploads SET name = '$name', url='$target_path'";
$statement = $dbh->prepare($sql);
$statement->execute();
This is working, however, when I upload a new file, rather than making a new entry in my database, it just overwrites the first one.I'm quite new at mysql so was wondering how I would make it add new entrys instead of overwriting the current one? Im going to use a large array of arrays, each of one having a lot of values and some sub arrays. My question is... is faster to use arrays or is better to have a object to acces using methods and all? i suppose objects are slower... Also i was planing in use arrays with string keys in nearly all places, normally these are slower, but in php hashes and arrays are the same tipe so i dont know... A few questions that if I was more knowledgeable about MySQL (such as the query log that I've heard of). - Does mysqli::multi_query() make multiple requests to the server or just one? - If it is just splitting the queries on the semicolon and then making multiple requests, is it still faster than looping and querying in PHP? - Does it take less memory than, lets say, mysql_query() foreach query? - Is it faster than, lets say again, mysql_query() looped? The last 2 I can probably just benchmark myself but I'm hoping someone will know off had. Background (blah blah blah) I'm working on a lean rapid development framework for myself (and maybe others eventually) to use. Much like Cake and other frameworks it does a lot of queries, often times more then you need. The sacrifice of course is performance VS ease of development, but I'm trying to not make a martyr out of my framework :-) I've observed on many occasions that simple queries can take more time than a complex query on seemingly random occasions. My understanding is that this is because of the connection, not the real amount of time it took for the server to query. I figure if I avoid multiple requests to the server I will cut down on the time everything takes. My theory is based on the same concept of combining all your CSS and JS files into single files to avoid dozens of HTTP requests which slow down page load time. Alright guys, I see people recommending prepared statements (PDO/MySQLi) and saying that they are way to go these days. However upon doing a bit more research, I've found that prepared statements, PDO in particular, is lacking in terms of performance, especially using SELECT statements. Now I'm starting a new project, which is basically a text based game with lots of queries and DB interaction, so I'm really interested in knowing what's the best approach for me. I was leaning towards PDO but I don't want it crawling my server under heavy load. I appreciate any advices or first hand experiences on this. I want to do a test while refreshing the page 100 times with 500 rows in a table, and then without 500 rows in a table and with different kind of php code, i need to do some type of testing to get results back in to show which way is faster for mysql/php. Any idea how to do this any scripts out there or a built in php/mysql function? Thanks I am wondering since in php when you write string in " " quotes php will look if there is any variable and if it is it will read that variable and replace variable name with that value inside the string. However when i use ' ' quotes php will not look for any variables inside that string. So my question is when you write a really big application is it good to always use ' ' quotes when you can instead of " " ones. Does that have an impact on performance. Thanks I have the following simple code to test against collision on a primary key I am creating: Code: [Select] $machine_ids = array(); for($i = 0; $i < 100000; $i++) { //Generate machine id returns a 15 character alphanumeric string $mid = Functions::generate_machine_id(); if(in_array($mid, $machine_ids)) { die("Collision!"); } else { $machine_ids[] = $mid; } } die("Success!"); Any idea why this is taking minutes to run? Anyway to speed it up? I am very new to PHP and have tried various techniques but I am getting a 500 error when clicking on the export button to download a csv report. I'm not sure why the previous developer did it this way. Is there a better why in PHP to make this code better? Willing to understand and learn from an PHP expert. The database is MYSQL.
$coursefilterid = $_GET['course'];
$conn = new mysqli($host, $username, $password, $database);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sqluserenrolled = "select mdl_user.username, mdl_user_enrolments.userid as enrolleduserid, mdl_enrol.courseid from mdl_user_enrolments
Inner Join
mdl_enrol
on
mdl_enrol.id = mdl_user_enrolments.enrolid
Inner Join
mdl_user
on
mdl_user.id = mdl_user_enrolments.userid
where
mdl_enrol.courseid = '" . $coursefilterid . "'
order by mdl_user.username
";
$queryenrolleduser = mysqli_query($conn, $sqluserenrolled);
?>
<html>
<head>
</head>
<body>
<form method="post"
action="<?php echo "userlistssiexport.php?id=$coursefilterid"?>">
<input type="hidden" name="exportcourseid"
value="<?php echo $coursefilterid;?>"> <input type="hidden"
name="sessid" value="<?php echo $USER->sesskey;?>"> <input
class="btn btn-primary" type="submit" name="submit"
value="<?php echo "Export";?>">
</form>
<?php
$noteid = "";
$cmId = "";
?>
<table class="data-table">
<caption class="title">User info</caption>
<thead>
<tr>
<th>Username</th>
<th>Firstname</th>
<th>Lastname</th>
<th>Email</th>
<th>Last login</th>
<th>Createddate</th>
<th>Position</th>
<th>Organization</th>
<th>Certificate Request Date</th>
<th>Role1</th>
<th>Role2</th>
<th>Role3</th>
</tr>
</thead>
<tbody>
<?php
while ($row = mysqli_fetch_array($queryenrolleduser)) {
$enrolleduserid = $row['enrolleduserid'];
$sql = "select mdl_user.username as username,
mdl_user.firstname as firstname,
mdl_user.lastname as lastname,
mdl_user.email as email,
mdl_user.lastlogin as lastaccess,
mdl_user.timecreated as createddate,
mdl_user_info_data.data as position
from mdl_user
Inner Join
mdl_user_info_data
on
mdl_user_info_data.userid = mdl_user.id
Inner Join
mdl_user_info_field
on
mdl_user_info_field.id = mdl_user_info_data.fieldid
Inner Join
mdl_user_lastaccess
on
mdl_user_lastaccess.userid = mdl_user.id
where mdl_user_info_field.id = 1
and
mdl_user.deleted = 0
and
mdl_user.id = '" . $enrolleduserid . "'
group by mdl_user.username
order by mdl_user.username
";
$query = mysqli_query($conn, $sql);
if (! $query) {
die('SQL Error: ' . mysqli_error($conn));
} else {}
?>
<?php
$no = 1;
$total = 0;
$username = '';
$coursename = '';
$content = '';
$modulename = '';
$organization = '';
$userid = '';
$certificatedate = '';
$userrole = '';
$enrolleduserid = '';
while ($row = mysqli_fetch_array($query)) {
// Do something here
$username = $row['username'];
$coursename = $row['coursename'];
$content = $row['content'];
$noteid = $row['noteid'];
// $notedatetime = date("d/m/y g:i (A)", $row['notedate']);
$notedatetime = date("D M j Y G:i A", $row['notedate']);
$lastaccess = date("D M j Y G:i A", $row['lastaccess']);
$createddate = date("D M j Y G:i A", $row['createddate']);
$datafile = $username . $coursename . $content;
echo '<tr>
<td>' . $row['username'] . '</td>
<td>' . $row['firstname'] . '</td>
<td>' . $row['lastname'] . '</td>
<td>' . $row['email'] . '</td>
<td>' . $lastaccess . '</td>
<td>' . $createddate . '</td>
<td>' . $row['position'] . '</td>
';
$modid = $row['contextid'];
// Get module name
$sqlmodule = "select mdl_user.username as username,
mdl_user.firstname as firstname,
mdl_user.lastname as lastname,
mdl_user.email as email,
FROM_UNIXTIME(mdl_user_lastaccess.timeaccess) as lastaccess,
FROM_UNIXTIME(mdl_user.timecreated) as createddate,
mdl_user_info_data.data as organization
from mdl_user
Inner Join
mdl_user_info_data
on
mdl_user_info_data.userid = mdl_user.id
Inner Join
mdl_user_info_field
on
mdl_user_info_field.id = mdl_user_info_data.fieldid
Inner Join
mdl_user_lastaccess
on
mdl_user_lastaccess.userid = mdl_user.id
where mdl_user_info_field.id = 3
and
mdl_user.deleted = 0
and
mdl_user.username ='" . $username . "'";
$querymodule = mysqli_query($conn, $sqlmodule);
?>
<?php
$modulenamelink = "";
while ($row = mysqli_fetch_array($querymodule)) {
$organization = $row['organization'];
}
echo '<td>' . $organization . '</td>';
$sqlCertificateDateuid = "select id from mdl_user where username = '" . $username . "'";
$queryCertificateDateuid = mysqli_query($conn, $sqlCertificateDateuid);
while ($row = mysqli_fetch_array($queryCertificateDateuid)) {
$userid = $row['id'];
}
$sqlcertificatedate = "select * from mdl_certificateemail where userid = '" . $userid . "'
and courseid = '" . $coursefilterid . "'";
$querycertificaterequestdate = mysqli_query($conn, $sqlcertificatedate);
while ($row = mysqli_fetch_array($querycertificaterequestdate)) {
$certificatedate = date("D M j Y g:i:s A", $row['unixdatetimecertificate']);
}
echo '<td>' . $certificatedate . '</td>';
$sqluserrole = "select mdl_role_assignments.userid, mdl_role_assignments.roleid,mdl_course_modules.course, mdl_role.shortname as rolename,FROM_UNIXTIME(mdl_role_assignments.timemodified) from mdl_role_assignments
Inner Join
mdl_context
on
mdl_context.id = mdl_role_assignments.contextid
Inner Join
mdl_course_modules
on
mdl_course_modules.instance = mdl_context.instanceid
Inner Join
mdl_role
on
mdl_role.id = mdl_role_assignments.roleid
where mdl_course_modules.course = '" . $coursefilterid . "'
and
mdl_role_assignments.userid = '" . $userid . "'
group by
mdl_role_assignments.userid,
mdl_role_assignments.roleid,
mdl_course_modules.course,
mdl_role.shortname,
mdl_role_assignments.timemodified
order by mdl_role_assignments.timemodified
";
$userlistrole = '';
$queryuserrole = mysqli_query($conn, $sqluserrole);
while ($row = mysqli_fetch_array($queryuserrole)) {
$userrole = $row['rolename'];
$userlistrole = array(
array(
$userrole
)
);
// echo '<td>'.$userrole.'</td>';
}
foreach ($userlistrole as $listrole) {
// echo $listrole;
}
$teacherrole = array(
'student'
);
foreach ($teacherrole as $rolename) {
$role = $DB->get_record('role', array(
'shortname' => $rolename
));
$context = get_context_instance(CONTEXT_COURSE, $coursefilterid);
// $context = context_course::instance($cid1);
$teachers = get_role_users($role->id, $context);
foreach ($teachers as $teacher) {
$teacherid = $teacher->id;
if ($teacherid == $userid) {
echo '<td>student</td>';
}
}
}
$teacherrole = array(
'editingteacher'
);
foreach ($teacherrole as $rolename) {
$role = $DB->get_record('role', array(
'shortname' => $rolename
));
$context = get_context_instance(CONTEXT_COURSE, $coursefilterid);
// $context = context_course::instance($cid1);
$teachers = get_role_users($role->id, $context);
foreach ($teachers as $teacher) {
$teacherid = $teacher->id;
if ($teacherid == $userid) {
echo '<td></td>';
echo '<td>editingteacher</td>';
}
}
}
$teacherrole = array(
'manager'
);
foreach ($teacherrole as $rolename) {
$role = $DB->get_record('role', array(
'shortname' => $rolename
));
$context = get_context_instance(CONTEXT_COURSE, $coursefilterid);
// $context = context_course::instance($cid1);
$teachers = get_role_users($role->id, $context);
foreach ($teachers as $teacher) {
$teacherid = $teacher->id;
if ($teacherid == $userid) {
echo '<td>manager</td>';
}
}
}
echo '</tr>';
}
}
?>
</tbody>
<tfoot>
</tfoot>
</table>
</body>
</html>
<?php
}
}
else {
header("Location:/index.php");
// echo "something";
die();
}
}
else {
header("Location:/index.php");
die();
}
?>
Do I really have to care about the amount of spaces/tabs I have in my program? Is my code good? Example: Code: [Select] class SportListout{ public $start; public $db; private $junk = 'This is junk data. Unable to find it \'s parents. It is recommended that you delete this data.'; function __construct($db){ $this -> db = $db; $this -> setStartingParent(); } function searchListout($sp){ $notif = 'There are no search results that match that criteria.'; if(strlen($sp) > 0){ if(strlen($sp) < 3){ This is my common text format. Is this ok or should I not make spaces in between functions? Hello,
Any ideas why server resources not exhausted on the code below, when my.cnf and php.ini are both set to use half the resources each? PHP & MySQL will both utilize all allotted resources on other scripts, so it's not a tuning problem. There is no script-side tuning.
The bottleneck: pdo select as shown below
foreach($bigList as $listObject) {
$sql = $dbl->prepare("SELECT * FROM fewMillionRows WHERE indexedCol1=:indexedCol1 AND indexedCol2=:indexedCol2 AND indexedCol3=:indexedCol3 AND indexedCol4=:indexedCol4 LIMIT 1");
$sql->execute($preparedValues);
$return = $sql->fetchAll(PDO::FETCH_ASSOC);
}
On a dedicated server with 8GB RAM, the server uses >5% cpu/ram but takes a long time to finish the script.
Second Question
What are some alternative designs?
Because the column values all happen to be alphanumeric, I could select the entire table and store it in an array. Accessing the keys like so: indexedCol1indexedCol2indexedCol3indexedCol4.
Results:
MyISAM - Select Whole Table: 30 seconds
MyISAM – Select Individual Rows (10k times) – 68 seconds
InnoDB – Select Whole Table: 30 seconds
InnoDB – Select Individual Rows (10k times) – 131 seconds
I am surprised it takes so long to select a whole table. The server resources use 1% for about 20 seconds, then cpu/ram jump to 30%+ for about 10 seconds. This is still drastically faster than individual selects.
In this instance, $bigList is over 500k items. At 68 seconds per 10k rows it’s absurdly long. Building an array with key/values is the only realistic way I currently know of, but I suspect there is a much better way of doing this.
As far as I know, I cannot do a select like so: SELECT * FROM t1 WHERE (column1,column2,column3) IN ((val1, val2,val3), (val4, val5,val6))
There is no way to determine whether a row was found for each entry as far as I know.
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