Possible Duplicate:
100% CPU when doing 4 or more concurrent requests with Magento
people. This is my first question, but this community has been helpful to me hundreds of times, so thank you very much.
Now to my issue. I know similar questions have been posted multiple times, but I am still unable to solve the issue after some hours on Google and in shell.
This is on a web server running Ubuntu 12.04 with Magento installed and low traffic (~70K page views per week).
Server specs:
- Ubuntu 12.04
- 1 core
- 2 GB RAM
Software versions
- Nginx: 1.1.19
- PHP5-FPM: 5.3.10-1ubuntu3.4 (fpm-fcgi)
- MySQL: 5.5.28-0ubuntu0.12.04.2
- APC: 3.1.7
- Memcached: 1.4.13
As far as I can tell, APC and Memcached is working perfectly.
THE FOLLOWING OUTPUT IS GENERATED WHEN SERVER IS HANDLING 10 - ten - USERS (basically nothing)
top
top - 14:07:41 up 12 days, 3:45, 1 user, load average: 1.37, 1.43, 1.48
Tasks: 90 total, 6 running, 84 sleeping, 0 stopped, 0 zombie
Cpu(s): 61.3%us, 6.0%sy, 0.0%ni, 30.3%id, 0.0%wa, 0.0%hi, 2.3%si, 0.0%st
Mem: 2051736k total, 1628388k used, 423348k free, 114516k buffers
Swap: 1998844k total, 0k used, 1998844k free, 370760k cached
vmstat 5
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
6 0 0 433952 114672 371120 0 0 9 34 3 10 34 4 62 0
0 0 0 434896 114680 371136 0 0 0 16 477 293 23 4 73 0
0 0 0 434664 114688 371168 0 0 0 17 560 379 36 5 58 0
5 0 0 424900 114696 371172 0 0 0 24 473 310 38 5 57 0
0 0 0 434340 114700 371196 0 0 0 12 379 281 21 3 77 0
1 0 0 429844 114712 371220 0 0 0 11 887 647 68 9 23 0
5 0 0 420048 114720 371224 0 0 0 43 528 361 41 5 54 0
0 0 0 435812 114720 371248 0 0 0 5 451 397 38 4 58 0
iotop: Hardly any read / write traffic
PHP-FPM status:
pool: www
process manager: static
start time: 29/Nov/2012:12:59:42 +0100
start since: 4572
accepted conn: 4157
listen queue: 0
max listen queue: 1
listen queue len: 128
idle processes: 19
active processes: 1
total processes: 20
max active processes: 9
max children reached: 0
Nginx Status:
Active connections: 13
server accepts handled requests
5781 5781 27611
Reading: 0 Writing: 1 Waiting: 12
Relevant PHP-FPM pool configuration
/etc/php5/fpm/pool.d/www.conf:
pm = static
pm.max_children = 20
pm.max_requests = 50
Total PHP Memory usage: 1.18 GB
Total Nginx memory usage: 151 MB
I am totally stumped as to why load is high and server is sluggish. Any input would be greatly appreciated. Even as to finding out excactly what is queueing up on my server to create this load.
EDITS:
Top when idle:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 24292 1944 1004 S 0.0 0.1 0:06.14 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.03 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 1:27.71 ksoftirqd/0
5 root 20 0 0 0 0 S 0.0 0.0 0:00.27 kworker/u:0
6 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
7 root RT 0 0 0 0 S 0.0 0.0 0:07.77 watchdog/0
Sudden bursts of php5-fpm in top:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
17533 www-data 20 0 786m 52m 25m R 19.8 2.6 0:11.21 php5-fpm
17534 www-data 20 0 786m 56m 30m R 19.8 2.8 0:10.58 php5-fpm
17539 www-data 20 0 786m 56m 30m R 19.8 2.8 0:09.49 php5-fpm
17544 www-data 20 0 786m 56m 30m R 19.8 2.8 0:09.98 php5-fpm
17671 www-data 20 0 786m 60m 34m R 19.8 3.0 0:08.10 php5-fpm
1 root 20 0 24292 1944 1004 S 0.0 0.1 0:06.14 init
