A detailed approach to small VPS optimization Nginx PHP-FPM

Small VPS is limited by the system resources, the traffic is too large, more than the system can withstand the limit, a part of the request will be 502. In the case of adequate system resources, optimizing NGINX,PHP-FPM, as well as the system itself, achieves 2 purposes:

1, reasonable allocation of system resources, the limited resources to maximize utilization. Good steel is used on the blade.
2, minimizing disk I/O
First, the system main resources

[Root@xxxxxx nginx]# Free-m
Total used free shared buffers Cached
mem:994 815 179 0 43 118
-/+ buffers/cache:453 540
swap:0 0 0

[Root@xxxxxx nginx]# Cat/proc/cpuinfo
processor:0
Vendor_id:genuineintel
CPU Family:6
model:62
Model Name:intel (R) Xeon (r) CPU e5-2650 v2 @ 2.60GHz
Stepping:4
CPU mhz:2594.024
Cache size:20480 KB
Physical id:0
Siblings:1
Core id:0
CPU Cores:1
apicid:0
Initial apicid:0
Fpu:yes
Fpu_exception:yes
CPUID level:13
Wp:yes
FLAGS:FPU VME de PSE TSC MSR PAE MCE cx8 APIC .... Omitted....
bogomips:5188.04
Clflush size:64
Cache_alignment:64
Address sizes:46 bits physical, bits virtual
Power Management:

Second, PHP-FPM optimization

PM = dynamic//Number of processes, dynamically allocated
Pm.max_children = 24//maximum number of processes
Pm.start_servers = 8//number of processes when just started
Pm.min_spare_servers = 8//minimum number of processes when the server is idle
Pm.max_spare_servers = 24//maximum number of processes when the server is idle

Php_flag[display_errors] = off//run for a period of time, turn off the error message
PHP-FPM a process takes up between 20m-30m, top look at the percentage of memory in PHP-FPM, the estimate will know. Max_children,max_spare_servers not bigger is better.

Third, nginx optimization

1, install the latest version of stability

# Vim/etc/yum.repos.d/nginx.repo//Add the following content

[Nginx]
Name=nginx Repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
Gpgcheck=0
Enabled=1

# yum Install nginx//update Nginx

2, optimize configuration Nginx

Worker_processes Auto; Setting up Auto,nginx process dynamic allocation

# Access_log//comment out, reduce I/O
# Log_format//comment out, reduce I/O

gzip on; Turn on gzip
Gzip_min_length 1k;
Gzip_buffers 4 16k;
Gzip_http_version 1.1;
Gzip_comp_level 5; 1-9, the greater the compression the better, the greater the consumption of resources
Gzip_types text/plain application/x-javascript text/css application/xml;
Gzip_vary on;
Worker_processes for small VPS, set to 1, 2 is also possible. It's enough.
For small VPS, the above NGINX,PHP-FPM optimization configuration is beneficial.

Four, Linux boot process optimization

# chkconfig--list |grep on
View the boot-initiated process and turn off the process without the need to start. If you do not know, it is best to check before deciding whether to close