I'm trying to diagnose a server where the website is loading very slowly, but unfortunately my client has only provided me with FTP access.
I've got FTP access so I can upload PHP scripts, but can't set up any other server side tools.
I have access to phpMyAdmin, but not direct access to the MySQL server. It is also unfortunately a Windows server (and we've been a Linux shop for over a decade now).
So, if I wan to evaluate MySQL & disk speed performance through PHP on a generic server, what is the best way to do this?
There are already tools like:
https://github.com/raphaelm/php-benchmark or https://github.com/InfinitySoft/php-benchmark
But I'm surprised there isn't something that someone has already set up & configured to just run through and do some basic testing of a server's responsiveness.
Every time we evaluate a new server environment it's handy to be able to compare it to an existing one quickly to see if there are any anomalies. I guess I'd just hoped that someone else had written up a script to do this already. I know I have, but that was before Github when there was a handy place to post scraps of code like this.
You've probably already done this, but just in case... If I were in your shoes, the first thing I'd be looking at are the indexes on the mysql tables and the queries in the application. I've seen some sites get huge speed boosts just by fixing a join or adding a missing index.
Don't forget to check the code for performance issues or calls to sleep(). If you haven't yet, it may be helpful to get the code running locally so you can run it through xdebug.
Related
I have a CakePHP application that is running on a shared hosting account, which the provider has been bugging me a lot (A2HOSTING) that my account is excessively using CPU resources, sometimes 100%.
Just on the last few hours alone, CPanel is reporting high CPU Usage. I have spoken with them and they said that everything is pointing to the 'webroot' directory. There I only have index.php and css.php.
Any ideas, what can be causing this issue, and what can I do to fix it, as they are threatening to suspend my account.
Thanks,
There is not a whole lot to say without a more
information. For now, Let's start with what is using 100% cpu? MySQL or PHP?
Also, the conditions you use. Any associations and so on...
If it all works ok on your local setup then I would start by looking
at any differences between that and your server.
Versions of CakePHP, PHP, MySQL... are they different? Is the server
running some infamous version of one of them?
Let's blame the database:
Is the database structure and data really identical, really? Look
carefully as every detail.
Do you have the same content in them? Exactly? Clone your dev database
including all table definitions and data.
Sometimes I notice a lapse of logic on my part where a "clean"
database will cause problems because I have had data in it during the
whole development and for some reason I have missed that something
(seemingly unrelated) will fail if a table is empty.
Let's blame PHP:
When PHP ends up at 100% cpu, the problem is usually that it is stuck
in a loop somewhere. Do you have one near that line?
If you let the request run, do you just get a timeout or an out of
memory?
Finding "first" should never result in out of memory unless your
server
has 200'000 related records being loaded. Try specifying recursive -1.
That is: load absolutely nothing from any other table.
Reference: https://groups.google.com/forum/?fromgroups#!topic/cake-php/lS91s355_Pw
This post might help you to decrease the CPU overload.
Apologize if this particular problem has been answered already (a search didn't turn anything directly relevant up).
We are developers of a web app that is used to provide community commenting and "social" to our partners websites. Our app uses Javascript and HTML on the front end, PHP and mySQL on the back.
Currently we are running everything through our own servers, which is getting very expensive.
We would like to ask our partners if we can host the app through their servers, with them getting a discount to our monthly charge due to the bandwidth/cpu load they would help us share.
My question is, is there a way to host our app through our partner's web servers in such a way that we can offload most of the CPU time and bandwidth without exposing our source code?
I would greatly appreciate any ideas/help!!
Thank you very much all!
If you also serve static or rarely changing content your clients could run a caching reverse proxy to remove some load from your servers without giving them any source code at all. But you need to implement caching headers for this to work properly.
You may want to look into nginx.
On second thought: Did you try to compile your scripts using facebooks Hip-Hop for PHP? First of all the script should perform way better, second of all, if you still had to outsource the hosting, you deploy a compiled program, no source code involved.
If you put the code on their server they can find out. So that won't be 100% working. Though you can make it difficult but it's still not great.
Most doable solution might be to separate parts of the application and share them. So: You give away a process (so source and other needed data) but it's only part of the total. That way no partner has your total solution but you do outsource the parts.
I got a situation where I have lots of system configurations/logs off which I have to generate a quick review of the system useful for troubleshooting.
At first I'd like to build kind of web interface(most probably a php site) that gives me the rough snapshot of the system configuration using the available information from support logs. The support logs reside on mirrored servers (call it log server) & the server on which I'll be hosting the site (call it web server) will have to ssh/sftp to access them.
My rough sketch:
The php script on web server will make some kind of connection to the log server & go to the support logs location.
It'll then trigger a perl script at logs server, which will collect relevant stuffs from all the config/log files into some useful xml (there'd be multiple of those).
Someway these xml files are transferred to web server & php will use it to create the html out of it.
I'm very new to php & would like to know if this is feasible or if there's any other alternative/better way of doing this?
It would be great if someone could provide more details for the same.
Thanks in advance.
EDIT:
Sorry I missed to mention that the logs aren't the ones generated on live machine, I'm dealing with sustenance activities for NAS storage device & there'll be plenty of support logs coming from different end customers which folks from my team would like to have a look at.
Security is not a big concern here (I'm ok with using plain text authentication to log servers) as these servers can be accessed only through company's VPN.
Yes, PHP can process XML. A simple way is to use SimpleXML: http://php.net/manual/en/book.simplexml.php
While you can do this using something like expect (I think there is something for PHP too..), I would recommend doing this in two separate steps:
A script, running via Cron, retrieves data from servers and store it locally
The PHP script reads from the local stored data only, in order to generate reports.
This way, you have these benefits:
You don't have to worry about how to make your php script connect via ssh to servers
You avoid the security risks related to allowing your webserver user log in to other servers (high risk in case your script gets hacked)
In case of slow / absent connectivity to servers, long time to retrieve logs, etc. you php script will still be able to quickly show the data -- maybe, along with some error message explaining what went wrong during latest update
In any case, you php script will terminate much quicker since it only has to retrieve data from local storage.
Update: ssh client via php
Ok, from your latest comment I understand that what you need is more a "front-end browser" to display the files, than a report generation tool or similar; in this case you can use Expect (as I stated before) in order to connect to remote machines.
There is a PECL extension for PHP providing expect functionality. Have a look at the PHP Expect manual and in particular at the usage examples, showing how to use it to make SSH connections.
Alternate way: taking files from NFS/SAMBA share
Another way, avoiding to use SSH, is to browse files on the remote machines via locally-mounted share.
This is expecially useful in case interesting files are already shared by a NAS, while I wouldn't recommend this if that would mean sharing the whole root filesystem or huge parts of it.
i have a database that is written in access. the access mdb file connects via ODBC to a local mysql database. i have a bunch of sql and vba code in the access file. i dont expect the database to surpass 100mb. currently it is around 10mb. i will need to have multiple user access. (no more than 10 users at a time)
i need to convert this database from being a local one to a web server, and i need to make a web interface for it.
how do i get the current local instance of mysql database to run off a webserver? i am currently running it off wampserver 2.0. i dont have experience putting a database on a webserver.
i have an OK vb.net background. i have never done any web applications. here's a picture of the access form that i may need to replicate to work off a website:
alt text http://img42.imageshack.us/img42/1025/83882488.jpg
which platform should i use as the front end to this thing?
would it be possible to just run this access file off a webserver instead of programming a new front end for it? is that not a smart idea?
thank you for your help!
If your webserver has TCP connectivity to your existing database server, and its hosted in a suitable place (eg, don't have your webserver in a datacenter connecting to a database server on your office DSL connection), then no move is required.
If you do need to move it, it's as easy as creating a backup/dump, and restoring it elsewhere.
As far as the frontend, there are MANY technologies that will do what you need (ASP.NET, PHP, Python, Ruby, Perl, Java being the most popular ones, not necessarily in that order).
Use something you are comfortable with, or that you are interested in learning (provided you have the time to do so)
Use something that runs properly on your target webserver. Really, ASP.NET is the only one that has any major issue here, as it's limited to Windows.
Access itself has no direct web-accessible version. A Google search finds some apps that claim to convert Access forms to web-based, but I will not link to any because I don't know how well they work. I'm certainly leary of anything like that, because web apps are a different breed from Windows apps. If you are going to go that route, be sure they actually generate HTML output; make sane, clean source; and offer a free trial so you can verify it actually works.
Really though, a form like that is reasonably easy to reproduce with some basic knowledge of server-side programming and some HTML.
I don't have any experience migrating access to a web-based interface, although I have heard of people going straight from access to a web page. MySql is exceptionally easy to migrate. MySQL.com has a program called mysqldump that comes with the standard install of MySQL that allows you to export your database straight to a text file that can be used then with mysqldump to import it on another server. I don't believe the WAMP server comes with the command line tools although they can be downloaded from mysql.com. However, if it has phpMyAdmin, then there is also an export feature with that as well that will generate a .sql file that can be imported to the webserver using phpMyAdmin. One thing to keep in mind though is that I have had very little success mixing and matching these methods: ie, I've never been able to get a mysqldump-created file to work with phpMyAdmin and vice versa.
Good luck!
The link will help you to export and import mySQL database
May be on Windows web server there is an opportunity to run Access files, you can check, but any way if you have some programming skills, I would say that it is not difficult to crate a php script which will query your database info and will edit.
Migrating an Access application to the web is quite difficult, because you can't translate an Access form 1:1 into a web page. Web apps are stateless, whereas Access is built around the concept of bound controls and bound datasets.
Secondly, it is impossible to easily replicate an Access subform.
Third, you lose tons of events that Access forms and controls are built around.
In general, a web page that performs the same task as an Access form will bear little or no resemblance to the Access form, simply because the methods for accomplishing the same tasks and the UI widgets available to you are so completely different.
One thing to consider is whether your users need a web application or if they just need to use your existing Access application over the Internet. If the latter is the case, Windows Terminal Server/Citrix can do the job for a lot less money, since there's no conversion needed. You do need to provision a Windows Terminal Server, set up a VPN and purchase CALs for the users, but the costs of those are going to be much less than the cost of rebuilding the app for web deployment.
It may not be an appropriate solution, but it's one that you should consider, I think.
I made an application using Flex,php,mysql. Now to give it
to a client, I am bundling this flex application with
xampp. There are few problems with this approach :
1. Whenever the flex application runs, an xampp window
also opens up.
2. The Apache port number, which I am giving to the client
is fixed. Same for mysql port number.
What could be a better alternative to overcome these?
It sounds like you are trying to make a desktop-like app right? If so, your approach was the wrong one. AIR lets you access a local sqlite database, so you don't need to write serverside code at all. Now, that's kind of a lame thing to hear now that you're already done, but if you'll always have some quirks if you go your current direction.
If you are building a web application (for instance, if you application has to be accessible by many people, from any computer in the world that has access to the Internet), it should be deployed on a web-server somewhere, and not on your client's desktop machine.
As a sidenote : in that cas, you'll probably have to deal with some kind of authentication mecanism, to make sure only the "right people" have access to it.
There are loads of hosting companies out there ; depending on your exact needs, many of those would probably be OK for you : PHP+MySQL is quite common nowadays ; just note they generally run PHP on Linux, and not Windows, which might imply some little differences (like case-sensitivity in files names, for instance)
Depending on the type of company your client works in, maybe they already have some hosting possibilities ?
In that case, they should deploy the application on one of their webservers, which would make it accessible to anyone on the company (depending on their configuration, but that's why webservers exist, after all)
If that didn't help, could you elaborate a bit more on your needs ?
Thanks :-)
If you are building some kind of desktop application, that needs to be installed on only one computer and used by one personn and no more... Well, PHP is not the best tool for that ^^