Posted by Johan Bakker on May 16, 2009
The overall performance of Ubuntu Linux is fine but to further tune the following can be done :
1. If you are not using IPv6 it can be disabled as follows:
In /etc/modprobe.d/aliases change the line alias net-pf-10 ipv6 into alias net-pf-10 off #ipv6.
2. Start daemon/processes in parallel
Change /etc/init.d/rc from CONCURRENCY=none in CONCURRENCY=shell
3. Add your hostname in the host file (default on hardy & intrepid). If you add your host name to the /etc/hosts file some apps will start quicker. e.g. 127.0.1.1 myhostname
4. Install preload. Startup times on apps. can be further improved by installing preload (apt-get install preload)
5. Decrease Swappiness setting
If you got plenty of ram (>1GB) you can decrease the use of the swap file by changing the vm.swappiness sysctl entry from 60 to 10. If you like to further reduce swapfile usage you can set this value to 0* which will not disable swapfile usage but will reduce it to the absolute minimum. To change the sysctl entry *sysctl vm.swappiness=10 can be used, to let this setting survive a reboot vm.swapiness=10 can be added to the /etc/sysctl.conf file.
I’ve found that the value of 5 works very good for my use and I have 2 GB of memory.
6. Use the profile option of grub to reduce startup time.
Hit the escape button when booting to get to the grub menu, select the default kernel and select edit, add the profile option to the end of the kernel line and boot your system.
8. Disable unused services.
9. Use the noatime mount option to disable updating the access time on files.
If you have additional tips I’m more then willing to test/add them to this list.
Posted by Johan Bakker on Sep 23, 2008
Developers and designers are using more and more JavaScript in modern designs. Sometimes this can be a hindrance to the user and take away from the simplicity of the design, and other times it can add greatly to the user’s experience. The key is a) adding the right amount of JavaScript, and b) using the right JavaScript techniques.
More: continued here
Posted by Johan Bakker on Sep 12, 2008
I knew it from the first glance, that regular expressions were very very beautiful. As of today, I feel that I have a pretty good grasp of regular expressions.
More: continued here
Posted by Johan Bakker on Sep 10, 2008
Apache is an open-source HTTP server implementation. It is the most popular web server on the Internet; the December 2005 Web Server Survey conducted by Netcraft [1] shows that about 70% of the web sites on Internet are using Apache.
Apache server performance can be improved by adding additional hardware resources such as RAM, faster CPU, etc. But most of the time, the same result can be achieved by custom configuration of the server. This article looks into getting maximum performance out of Apache with the existing hardware resources, specifically on Linux systems. Of course, it is assumed that there is enough hardware resources – especially enough RAM that the server isn’t swapping frequently. First two sections look into various Compile-Time and Run-Time configuration options. The Run-Time section assumes that Apache is compiled with prefork [1] MPM. HTTP compression and caching is discussed next. Finally, using separate servers for serving static and dynamic contents is covered. Basic knowledge of compiling and configuring Apache and Linux are assumed.
Continue Reading…Posted by Administrator on Mar 03, 2008
