How do I know if my PHP application is using too much memory?

Posted by John on Stack Overflow See other posts from Stack Overflow or by John
Published on 2010-03-16T17:03:47Z Indexed on 2010/03/16 17:11 UTC
Read the original article Hit count: 185

Filed under:

php

|

optimization

|

apache

|

ram

|

memory-usage

I'm working on a PHP web application that let's users network with each other, book events, message etc... I launched it a few months ago and at the moment, there's only about 100 users.

I set up the application on a VPS with ubuntu 9.10, apache 2, mysql 5 and php 5. I had 360 Mb of RAM, but upgraded to 720 MB a few minutes ago.

Lately, my web application has been experiencing outages due to excessive memory usage. From what I can tell in error logs, it seems the server automatically kills apache processes that consume too much memory. As a result, I upgraded memory from 360 MB to 720 MB as a stop-gap measure.

So my question is, how do I go about resolving these outage issues? How do I know if my website's need for more memory is due to poor code or if it's part of the website's natural growth? What's the most efficient way to determine which PHP scripts consume the most memory?

© Stack Overflow or respective owner

Related posts about php

Magento, NGINX, PHP-FPM, APC, MEMCACHED, 16gb Ram CentOS, Spiking PHP-FPM to 100% CPU

as seen on Server Fault - Search for 'Server Fault'
I have been trying to resolve my issue of spiking cpu caused by php-fpm processes. I've reduced the php-fpm config settings to: pm = ondemand pm.max_children = 12 pm.start_servers = 2 pm.min_spare_servers = 2 pm.max_spare_servers = 10 pm.max_requests = 500 php_admin_value[memory_limit] = 128M Problem… >>> More
PHP Pear Installation on CentOS

as seen on Server Fault - Search for 'Server Fault'
[root@ip ~]# yum install php-pear* Reducing CentOS-5 Testing to included packages only Finished Setting up Install Process Package 1:php-pear-1.8.1-2.el5.centos.noarch already installed and latest versio … >>> More
Apache configurations for php "AddType text/html php" or "AddType application/x-httpd-php php .php"

as seen on Server Fault - Search for 'Server Fault'
I am taking over an application server and discover that it contain the following settings: AddType text/html php Although it works, but my understanding is that it should set as following: AddType application/x-httpd-php php .php What are the key differences between the two settings?… >>> More
mod_rewrite settings causes server to throw HTTP 500 errors instead of 404

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a server with VBulletin forum (working under Apache 2.2, CentOS). The default settings for it in .htaccess are as follows: RewriteEngine on RewriteCond %{HTTP_HOST} ^gsmforum\.ru RewriteRule (.*) http://www.gsmforum.ru/$1 [R=301,L] # If you are having problems or are using VirtualDocumentRoot… >>> More
Problems installing Memcache (PECL extension)

as seen on Server Fault - Search for 'Server Fault'
I have installed memcached fine, and now I will need to install PECL extension memcache. Im running RedHat x86_64 es5. The installation gives me this: downloading memcache-2.2.6.tgz ... Starting to download memcache-2.2.6.tgz (35,957 bytes) ..........done: 35,957 bytes 11 source files, building running:… >>> More

Related posts about optimization

Search Engine Optimization - The Importance of Page Optimization in Search Engine Optimization

as seen on Ezine Articles - Search for 'Ezine Articles'
In order for your website to rank well, your internal linking structure is critical to your success. This is covered some of the theory for this in various articles and blogs about Page Structure of a website, which said how you should map out the physical linking structure, but in this guide I will… >>> More
SEO Optimization - How to Master the SEO Optimization Process in Four Easy Steps

as seen on Ezine Articles - Search for 'Ezine Articles'
Search engine optimization is a critical part of any internet marketing campaign but can often be intimidating to new marketers. In this article you will learn the 4 basic components of SEO. >>> More
Keywords Optimization For Website Optimization

as seen on Ezine Articles - Search for 'Ezine Articles'
Saying that you need to do website optimization sounds like saying you need to get healthy. To get healthy we do 2 things: diet management and exercise. Lets start with diet management. Keywords are like food for your WebPages. This article explains the role of keywords in website optimization. >>> More
The Expert Secret to Search Engine Optimization - Effective Website Optimization

as seen on Ezine Articles - Search for 'Ezine Articles'
Throwing keywords into a program that shows you how popular they are and then using those keywords without doing a little bit of preliminary research and answering some very important questions can just spell disaster. There are three questions that are extremely important to ask yourself before just… >>> More
Importance of On-Page Optimization in Search Engine Optimization (SEO)

as seen on Ezine Articles - Search for 'Ezine Articles'
On-page optimization is crucial for any website. Read the importance of on-page optimization and how it would be helpful for getting high ranking in search engines. >>> More