= Performance Tuning =

== System Performance Tuning : Memory ==

 * 

== File System Performance Tuning ==

 * /etc/security/limits.conf - 每個程序(process)可以開啟檔案的個數(number limits of open files per process)
{{{
#!diff
--- /etc/security/limits.conf 2010-02-22 11:29:11.000000000 +0800
+++ /etc/security/limits.conf.new 2010-02-22 11:28:33.000000000 +0800
@@ -49,4 +49,6 @@
 #ftp             -       chroot          /ftp
 #@student        -       maxlogins       4
 
+*      soft        nofile        8192
+
 # End of file
}}}


== I/O Performance Tuning ==

== Network Performance Tuning ==

 * TCP Tuning
{{{
echo 262144 > /proc/sys/net/core/rmem_default
echo 8388608 > /proc/sys/net/core/wmem_max 131071
echo 8388608 > /proc/sys/net/core/rmem_max
echo "4096 87380 4194304" > /proc/sys/net/ipv4/tcp_rmem
echo "4096 65536 4194304" > /proc/sys/net/ipv4/tcp_wmem
}}}