我每天都会遇到服务器变慢的问题。我相信这是 nginx 或 php-fpm 在某个时候放弃并且无法正常恢复的问题。我将提供任何可以提供帮助的信息。我将从我的 nginx 和 php-fpm 设置开始。如果还有其他有用的信息可以发布在这里，请告诉我。如果这可能有助于诊断，我会使用 cloudflare。
如果以下信息不够，我还会接受关于如何找出原因的建议。
该网站是这里
编辑：
似乎每个请求都开始使用 nignx 或 php 可以使用的设定资源量，但不会释放它们。top当服务器开始响应缓慢时，我的监控并没有显示 CPU 或内存的峰值。在某些时候，缓慢达到超时并返回 5XX 错误。
我在 linode 上托管了一个服务器。它的规格如下：
8 GB RAM
6 CPU Cores
192 GB SSD Storage
8 TB Transfer
40 Gbps Network In
1000 Mbps Network Out
nginx.conf
user www-data www-data;
worker_processes 6;
pid /run/nginx.pid;
events {
worker_connections 768;
# multi_accept on;
}
http {
##
# Basic Settings
##
# set client body size to 2M #
client_max_body_size 50M;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
# added cbt, cht, st -- kt was there
keepalive_timeout 5;
types_hash_max_size 2048;
server_tokens off;
# server_names_hash_bucket_size 64;
# server_name_in_redirect off;
default_type application/octet-stream;
include /etc/nginx/mime.types;
##
# Logging Settings
##
log_format cf_custom '$remote_addr - $remote_user [$time_local] '
'"$request" $status $body_bytes_sent '
'"$http_referer" "$http_user_agent" '
'$http_cf_ray';
#access_log /var/log/nginx/access.log;
#error_log /var/log/nginx/error.log;
##
# Gzip Settings
##
gzip on;
gzip_disable "msie6";
gzip_vary on;
gzip_proxied any;
gzip_comp_level 5;
# gzip_buffers 16 8k;
gzip_http_version 1.0;
# Gzip the following types of requests/files
gzip_types application/atom+xml application/javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/plain text/x-component;
##
# nginx-naxsi config
##
# Uncomment it if you installed nginx-naxsi
##
#include /etc/nginx/naxsi_core.rules;
##
# nginx-passenger config
##
# Uncomment it if you installed nginx-passenger
##
#passenger_root /usr;
#passenger_ruby /usr/bin/ruby;
##
# Virtual Host Configs
##
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
# Cloudflare
set_real_ip_from 199.27.128.0/21;
set_real_ip_from 173.245.48.0/20;
set_real_ip_from 103.21.244.0/22;
set_real_ip_from 103.22.200.0/22;
set_real_ip_from 103.31.4.0/22;
set_real_ip_from 141.101.64.0/18;
set_real_ip_from 108.162.192.0/18;
set_real_ip_from 190.93.240.0/20;
set_real_ip_from 188.114.96.0/20;
set_real_ip_from 197.234.240.0/22;
set_real_ip_from 198.41.128.0/17;
set_real_ip_from 162.158.0.0/15;
set_real_ip_from 104.16.0.0/12;
set_real_ip_from 172.64.0.0/13;
set_real_ip_from 2400:cb00::/32;
set_real_ip_from 2606:4700::/32;
set_real_ip_from 2803:f800::/32;
set_real_ip_from 2405:b500::/32;
set_real_ip_from 2405:8100::/32;
real_ip_header CF-Connecting-IP;
}
php-fpm.conf
[global]
pid = /var/run/php5-fpm.pid
error_log = /var/log/php5/fpm.log
log_level = debug
emergency_restart_threshold = 10
emergency_restart_interval = 1m
process_control_timeout = 10
process.max = 128
include=/etc/php5/fpm/pool.d/*.conf
閣下網站
[www]
user = www-data
group = www-data
listen = /var/run/php5-fpm.sock
listen.owner = www-data
listen.group = www-data
listen.mode = 0660
pm = ondemand
pm.max_children = 26
pm.start_servers = 8
pm.min_spare_servers = 5
pm.max_spare_servers = 11
pm.process_idle_timeout = 10s;
pm.max_requests = 50
slowlog = /var/log/php5/slow.log
request_slowlog_timeout = 10s
request_terminate_timeout = 360s
;rlimit_files = 1024
rlimit_core = unlimited
chdir = /
顶部
top - 14:39:10 up 1:04, 2 users, load average: 1.47, 1.28, 1.28
Tasks: 187 total, 3 running, 183 sleeping, 1 stopped, 0 zombie
%Cpu(s): 16.0 us, 4.8 sy, 0.0 ni, 79.1 id, 0.0 wa, 0.0 hi, 0.1 si, 0.1 st
KiB Mem: 8206476 total, 7661580 used, 544896 free, 2386564 buffers
KiB Swap: 524284 total, 1328 used, 522956 free. 680268 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1653 root 20 0 284736 41136 15176 S 6.3 0.5 0:00.19 php5
1659 root 20 0 285048 42040 15672 S 6.3 0.5 0:00.19 php5
1668 root 20 0 285048 42076 15704 S 6.3 0.5 0:00.19 php5
1676 root 20 0 285048 41956 15588 S 6.3 0.5 0:00.19 php5
1645 root 20 0 284732 41060 15108 S 6.0 0.5 0:00.18 php5
1649 root 20 0 284732 41480 15520 S 6.0 0.5 0:00.18 php5
1656 root 20 0 284736 41336 15376 S 6.0 0.5 0:00.18 php5
1664 root 20 0 284736 41320 15360 S 6.0 0.5 0:00.18 php5
1680 root 20 0 284736 41332 15368 S 6.0 0.5 0:00.18 php5
1684 root 20 0 280172 38288 14816 R 5.3 0.5 0:00.16 php5
1222 www-data 20 0 351712 80236 64044 S 4.3 1.0 0:00.64 php5-fpm
1065 www-data 20 0 351680 79912 63768 S 3.7 1.0 0:00.79 php5-fpm
1215 www-data 20 0 351548 68972 52844 S 3.7 0.8 0:00.58 php5-fpm
1484 www-data 20 0 349536 65116 49748 S 3.7 0.8 0:00.23 php5-fpm
502 www-data 20 0 351604 69484 53932 S 2.7 0.8 0:01.26 php5-fpm
1496 www-data 20 0 349532 65248 49748 S 2.7 0.8 0:00.23 php5-fpm
31105 www-data 20 0 351776 81428 65260 S 2.7 1.0 0:02.92 php5-fpm
3194 www-data 20 0 88216 7788 4440 S 2.3 0.1 0:09.70 nginx
31652 www-data 20 0 352180 82120 65644 S 2.3 1.0 0:02.73 php5-fpm
512 www-data 20 0 347204 71160 57300 S 2.0 0.9 0:01.14 php5-fpm
980 www-data 20 0 351712 80484 64300 S 2.0 1.0 0:00.82 php5-fpm
1639 root 20 0 285048 41864 15492 S 2.0 0.5 0:00.19 php5
31275 www-data 20 0 349020 78496 64812 S 2.0 1.0 0:03.20 php5-fpm
32114 www-data 20 0 351628 78468 62316 S 2.0 1.0 0:01.93 php5-fpm
588 www-data 20 0 352940 82800 66476 S 1.7 1.0 0:01.64 php5-fpm
30959 www-data 20 0 351816 83404 67180 S 1.7 1.0 0:03.43 php5-fpm
31736 www-data 20 0 349788 68604 54188 S 1.7 0.8 0:02.50 php5-fpm
3129 mysql 20 0 3441720 208516 11144 S 1.3 2.5 1:23.69 mysqld
840 www-data 20 0 349788 76684 62444 R 1.0 0.9 0:00.84 php5-fpm
3617 root 20 0 560496 12724 5328 S 0.7 0.2 0:21.73 fail2ban-server
7 root 20 0 0 0 0 S 0.3 0.0 0:04.87 rcu_sched
1462 root 20 0 0 0 0 S 0.3 0.0 0:03.17 kworker/4:1
1635 root 20 0 285048 41928 15556 S 0.3 0.5 0:00.19 php5
3299 root 20 0 279628 37576 14760 S 0.3 0.5 0:11.20 php
3301 root 20 0 279628 37616 14800 S 0.3 0.5 0:11.24 php
3304 root 20 0 279628 37652 14840 S 0.3 0.5 0:11.16 php
3305 root 20 0 279628 37528 14712 S 0.3 0.5 0:11.04 php
3307 root 20 0 279628 37620 14804 S 0.3 0.5 0:11.06 php
3309 root 20 0 279628 37696 14880 S 0.3 0.5 0:11.27 php
3313 root 20 0 278344 36640 15032 S 0.3 0.4 0:10.60 php
3314 root 20 0 278344 36560 14952 S 0.3 0.4 0:10.57 php
3319 root 20 0 278344 36632 15024 S 0.3 0.4 0:10.63 php
3333 root 20 0 278344 36672 15068 S 0.3 0.4 0:10.41 php
1 root 20 0 33652 4196 2724 S 0.0 0.1 0:03.96 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.17 ksoftirqd/0
4 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
6 root 20 0 0 0 0 S 0.0 0.0 0:01.13 kworker/u12:0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root rt 0 0 0 0 S 0.0 0.0 0:00.05 migration/0
10 root rt 0 0 0 0 S 0.0 0.0 0:00.05 migration/1
11 root 20 0 0 0 0 S 0.0 0.0 0:00.07 ksoftirqd/1
12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kworker/1:0
13 root 0 -20 0
iostat
Linux 4.1.5-x86_64-linode61 (localhost) 09/29/2015 _x86_64_ (6 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
16.05 0.00 5.52 0.12 0.12 78.19
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
xvda 74.76 321.33 285.55 3117199 2770120
xvdb 0.02 0.06 0.14 572 1336
iostat -x 1 -- 当速度慢时
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 0.00 0.00 7.00 0.00 28.00 8.00 0.00 0.43 0.00 0.43 0.57 0.40
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
25.84 0.00 8.22 0.00 0.17 65.77
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 55.00 0.00 10.00 0.00 264.00 52.80 0.00 0.40 0.00 0.40 0.30 0.30
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
8.68 0.00 4.17 0.00 0.00 87.15
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
10.18 0.00 5.01 0.00 0.00 84.81
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
18.06 0.00 5.52 0.00 0.00 76.42
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 0.00 0.00 3.00 0.00 12.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
17.47 0.00 6.82 0.00 0.17 75.54
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 0.00 0.00 7.00 0.00 28.00 8.00 0.00 0.43 0.00 0.43 0.43 0.30
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
15.55 0.00 3.34 0.00 0.00 81.10
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvda 0.00 105.00 0.00 21.00 0.00 696.00 66.29 0.00 0.14 0.00 0.14 0.19 0.40
xvdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00