HOWTO : Performance tuning of LAMP and Ubuntu 9.04 Server

Performance tuning of LAMP

Step 1:

To control the bandwidth and allow faster cgi browsing, you should install the following modules.

sudo apt-get install libapache2-mod-bw libapache2-mod-fastcgi

Step 2 :

sudo a2enmod deflate

sudo nano /etc/apache2/conf.d/deflate.conf

Add the following lines at the file.

   DeflateCompressionLevel 6
   AddOutputFilterByType DEFLATE text/plain
   AddOutputFilterByType DEFLATE text/html
   AddOutputFilterByType DEFLATE text/xml
   AddOutputFilterByType DEFLATE text/css
   AddOutputFilterByType DEFLATE application/xhtml+xml
   AddOutputFilterByType DEFLATE application/xml
   AddOutputFilterByType DEFLATE application/rss+xml
   AddOutputFilterByType DEFLATE application/atom_xml
   AddOutputFilterByType DEFLATE application/x-javascript
   AddOutputFilterByType DEFLATE application/x-httpd-php
   AddOutputFilterByType DEFLATE application/x-httpd-fastphp
   AddOutputFilterByType DEFLATE application/x-httpd-eruby
   AddOutputFilterByType DEFLATE image/svg+xml
   AddOutputFilterByType DEFLATE application/postscript
   
      Header append Vary User-Agent
   

sudo /etc/init.d/apache2 restart

Step 3 :

wget http://bart.eaccelerator.net/source/0.9.5.3/eaccelerator-0.9.5.3.tar.bz2

tar xvf eaccelerator-0.9.5.3.tar.bz2

sudo apt-get install build-essential php5-dev

cd eaccelerator-0.9.5.3
phpize
./configure
make
sudo make install

sudo mkdir /tmp/eaccelerator
sudo chmod 0777 /tmp/eaccelerator

Step 4 :

sudo nano /etc/php5/apache2/php.ini

Append the following lines at the end of the file.

extension="eaccelerator.so"
; shm_size default is 16, you may change to 64 or 128 depends on your RAM
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"

sudo /etc/init.d/apache2 restart

Performance tuning of Ubuntu 9.04 Server

Step 5 :

sudo nano /etc/sysctl.conf

Append the following lines at the end of the file.

kernel.sem = 250 32000 100 128
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
# If you have more than 512MB RAM, use this setting (uncomment it and comment the setting just below)
#fs.file-max = 262140
# If you have 512MB RAM or less, use this setting
fs.file-max = 65535
vm.swappiness = 1
vm.vfs_cache_pressure = 50
vm.min_free_kbytes = 65536

net.core.rmem_default = 33554432
net.core.rmem_max = 33554432
net.core.wmem_default = 33554432
net.core.wmem_max = 33554432
net.ipv4.tcp_rmem = 10240 87380 33554432
net.ipv4.tcp_wmem = 10240 87380 33554432
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
net.core.netdev_max_backlog = 5000
net.ipv4.tcp_mem = 786432 1048576 26777216
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_max_tw_buckets = 360000

sudo /sbin/sysctl -p

Step 6 :

sudo nano /etc/rc.local

Add the following lines before "exit 0".

echo 1024 > /sys/block/sda/queue/read_ahead_kb
echo 256 > /sys/block/sda/queue/nr_requests

*The captioned lines are for sda only.

Step 7 :

sudo nano /etc/fstab

Add "noatime" before "relatime". For example :

UUID=0e57987f-...... / ext3 noatime,relatime,errors=remount-ro 0 1

or

UUID=0e57987f-...... / ext4 noatime,relatime,errors=remount-ro 0 1

sudo mount -a

If there is no error message, you can now reboot your system.

That's all. See you!