[转]PHP-FPM on highload tips

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　　from http://www.lstk.net/index.php?id=23
　　When you running a highload website with [size=0.9em]PHP-[size=0.9em]FPM via FastCGI, the following tips may be useful to you : ) 
1. Compile [size=0.9em]PHP’s modules as less as possible, the simple the best (fast); 
2. Increas [size=0.9em]PHP FastCGI child number to 100 and even more. Sometime, 200 is OK! ( On 4GB memory server); 
3. Using [size=0.9em]SOCKET [size=0.9em]PHP FastCGI, and put into /dev/shm on Linux; 
4. Increase Linux “max open files”, using the following command (must be root): # echo ‘ulimit -HSn 65536’ >> /etc/profile # echo ‘ulimit -HSn 65536 >> /etc/rc.local # source /etc/profile 
5. Increase [size=0.9em]PHP-[size=0.9em]FPM open file description rlimit: # vi /path/to/php-fpm.conf Find “1024“ Change 1024 to 4096 or higher number. Restart [size=0.9em]PHP-[size=0.9em]FPM. 
6. Using [size=0.9em]PHP code accelerator, e.g eAccelerator, XCache. And set “cache_dir” to /dev/shm on Linux.