我使用 Nginx+PHP-FPM 和 php 5.3.6,几个星期以来运行良好。几天前我发现大多数 PHP-FPM 子进程占用 3MB,但少数子进程占用700MB。Web 应用程序每秒处理 1000 个请求,非常繁忙。PHP-FPM 与 APC(操作码使用)一起使用
有人可以指导一下吗?
This script I used to get memory usage by child pid
http://www.pixelbeat.org/scripts/ps_mem.py.
It could be verified by 'top' method too
top output(limited view)::
------------------------------
------------------------------
28419 daemon 20 0 844m 757m 4200 S 0 6.4 0:14.27 php-fpm
16788 daemon 20 0 700m 614m 4632 S 0 5.2 0:28.34 php-fpm
29450 daemon 20 0 669m 581m 3548 S 0 4.9 0:08.31 php-fpm
17881 daemon 20 0 642m 556m 4108 S 0 4.7 0:14.83 php-fpm
19048 daemon 20 0 642m 555m 4108 S 0 4.7 0:08.86 php-fpm
11956 daemon 20 0 97612 10m 5476 S 4 0.1 0:39.57 php-fpm
11993 daemon 20 0 97560 10m 5188 S 4 0.1 0:39.18 php-fpm
11925 daemon 20 0 97328 10m 5144 D 3 0.1 0:38.68 php-fpm
11953 daemon 20 0 97748 10m 5172 S 4 0.1 0:38.51 php-fpm
php-fpm.conf:
/etc/php-fpm/php-fpm.conf
listen = 127.0.0.1:9000
user = daemon
group = daemon
pm = dynamic
pm.max_children = 2000
pm.start_servers = 50
pm.min_spare_servers = 40
pm.max_spare_servers = 90
pm.max_requests = 10000
以下是更多调试输入:
地图::
pmap 28419
0000000000b52000 96K rw--- [ anon ]
0000000001a49000 1668K rw--- [ anon ]
0000000001bea000 208K rw--- [ anon ]
0000000001c1e000 770476K rw--- [ anon ]
跟踪::
strace -p 28419
Process 28419 attached - interrupt to quit
restart_syscall(<... resuming interrupted call ...>) = 0
recvfrom(4, 0x1bda1d0, 8196, 64, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout)
recvfrom(4, 0x1bda1d0, 8196, 64, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}], 1, 5000^C <unfinished ...>
加载的 PHP 模块有:
[PHP Modules]
apc
Core
date
ereg
hash
json
libxml
mbstring
mcrypt
memcache
memcached
mysql
mysqli
pcntl
pcre
Reflection
session
SimpleXML
SPL
standard
xml
答案1
尝试将最大请求数降低到类似 的值pm.max_requests = 100
。这将在 100 个请求后重新启动该进程,释放可能由于脚本中的内存泄漏而丢失的内存。
答案2
您需要更改pm = dynamic
为pm = ondemand
。它将使 Ram 使用量减少一半。