Category Archives: Server

PHP Profiling Time and Memory with OSX 10.10 and Xdebug

First you need to have installed Xdebug, to install Xdebug on Linux debian click here.

Configure XDEBUG for time specific profiling:

mkdir /var/log/xdebug-profiling-output/
chmod -R 777 /var/log/xdebug-profiling-output/
nano /etc/php5/apache2/conf.d/xdebug.ini

xdebug.profiler_output_dir=/var/log/xdebug-profiling-output/
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger=1

These settings mean that time profiling outputs will be stored in /var/log/xdebug-profiling-output/, profiling will be disabled by default and only activated using trigger. Having profiling on as default is not recommended because it drains the system resources.

Now reboot Apache2:

/etc/init.d/apache2 graceful

To generate a profiling log, append ?XDEBUG_PROFILE=1 to your site-url, like this: http://www.mywebsite.com/index.php?XDEBUG_PROFILE=1

To be able to parse the output in OSX 10.10 you need Graphviz installed, install it using Homebrew by running:

brew install qcachegrind

Generate a log on your website and then remember the filename path. Copy it over to your OSX machine using:

scp root@mywebsite.com:/var/log/xdebug-output/cachegrind.out.4852 ~/Downloads/

Now open this file in the application qcachegrind to analyze the profiling. You can also analyze the Xdebug profiling output using Php Storms built-in Xdebug Profiler Snapshot analyzer if you have it.

Configure XDEBUG for memory specific profiling:

mkdir /var/log/xdebug-trace-output/
chmod -R 777 /var/log/xdebug-trace-output/
nano /etc/php5/apache2/conf.d/xdebug.ini

xdebug.auto_trace=0
xdebug.trace_enable_trigger=1
xdebug.trace_output_dir=/var/log/xdebug-trace-output/
xdebug.collect_params=0
xdebug.trace_format=1
xdebug.show_mem_delta=1
xdebug.collect_assignments=1

These settings means that memory profiling will be disabled by default to save resources, profiling logs will be generated in the folder /var/log/xdebug-trace-output/.

Now reboot Apache2

/etc/init.d/apache2 graceful

To generate a profiling log, append ?XDEBUG_TRACE=1 to your site-url, like this: http://www.mywebsite.com/index.php?XDEBUG_TRACE=1

Check generate filename and copy trace log from remote host to OSX.

scp root@mywebsite.com:/var/log/xdebug-trace-output/trace.2043925204.xt ~/Downloads/

Now you can open the log in text-editor.

Install Xdebug on Linux Debian

First you need the follow packages installed:
* php5-dev
* php-pear
* make

Install them by running:

apt-get update
apt-get install php5-dev php-pear make

Then to install xdebug type:

pecl install xdebug

Now, DON’T add anything to php.ini but do this instead:

find / -name "xdebug.so"

Copy the location of xdebug.so.

Start editing a new file like this:

nano /etc/php5/conf.d/xdebug.ini

Enter your configuration, usually something like this:

zend_extension="LOCATION OF XDEBUG.SO ABOVE"

[debug]
xdebug.remote_enable=1
xdebug.remote_host=YOUR IP ADDRESS
xdebug.remote_port=9000
xdebug.remote_mode="req"
xdebug.idekey="YOUR IDE KEY"
xdebug.remote_autostart=0
xdebug.remote_handler="dbgp"
xdebug.remote_connect_back=0
xdebug.extended_info=1
xdebug.remote_log=/var/log/xdebug.remote_log.log

Now restart apache2 by running

/etc/init.d/apache2 restart

You can see if your xdebug is loaded in PHP by looking after xdebug in this output:

Also in terminal you can do this:

php -i | grep xdebug

Now to start a debug session your go to your site and append query string like this:
?XDEBUG_SESSION_START=YOUR_IDE_KEY

And to end a debug session you do this:
?XDEBUG_SESSION_STOP=YOUR_IDE_KEY

Read more about XDEBUG here.

Setup Youtrack Stand-alone on Linux Debian

Install java (version 7 minimum) by executing:

apt-get update
apt-get install openjdk-7-jre
apt-get install openjdk-7-jdk

Check your java version by running

java -version

If your default version is not 7 or higher change by running and selecting another version as default.

update-alternatives –config java

Download YouTrack Stand-alone from JetBrains. Or download by using console:

mkdir /var/web/youtrack
wget http://download.jetbrains.com/charisma/youtrack-5.1.2.jar /var/web/youtrack/youtrack-5.1.2.jar

Make a new init script like this

nano /etc/init.d/youtrack
#!/bin/bash

### BEGIN INIT INFO
# Provides:          youtrack
# Required-Start:    $local_fs $remote_fs $network
# Required-Stop:     $local_fs $remote_fs $network
# Should-Start:      $named
# Should-Stop:       $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts YouTrack.
# Description:       Starts YouTrack tracking system.
### END INIT INFO

java -Xmx1g -XX:MaxPermSize=1g -Djava.awt.headless=true -jar /var/web/youtrack/youtrack-5.1.2.jar 8088 &

Modify permissions like this

chmod -R 755 /etc/init.d/youtrack

Then install your init-script by running:

insserv /etc/init.d/youtrack

YouTrack server will now launch every time system boots and is accessed on port 8088. Notice this guide is for Youtrack 5.1.2 so if you download a newer version just change the path in the init script.

To launch YouTrack for this first-time do this:

/etc/init.d/youtrack

To integrate with Apache2 as a HTTPS site do this, otherwise you are done.

Activate modules needed for SSL proxy.

a2enmod ssl
a2enmod proxy
a2enmod proxy_http
a2enmod headers

Add a Apache2 site by doing this:

nano /etc/apache2/sites-available/default-ssl

Add following to the file:

<VirtualHost *:443>

SSLEngine on
SSLCertificateFile /etc/apache2/apache.pem

ServerAdmin admin@locahost
ServerName mydomain.com
DocumentRoot /var/web/youtrack/

<Location />
SSLRequireSSL
Header edit Location ^http: https:
</Location>

RequestHeader set X-Forwarded-Proto "https"

ProxyRequests Off
ProxyPass / http://mydomain.com:8088/
ProxyPassReverse / http://mydomain.com:8088/

ErrorLog /var/web/youtrack/error.log
LogLevel warn
CustomLog /var/web/youtrack/access.log combined

</VirtualHost>

Activate site by

a2ensite default-ssl

Restart Apache2 configuration

/etc/init.d/apache2 graceful

If all went good your YouTrack installation should be accessible at https://mydomain.com

Read more

Read more about install YouTrack stand-alone here.
Read more about install Java on Debian here.