Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

I don't get it. I have a VPS with Nginx and php-fpm and MySQL. Should be very lightweight. No Apache, right? When I reboot, it is very lightweight. ~ 50/481 MB MEM usage. Very acceptable IMO.

And after a few days there are ~ 20 mysqld processes running and ~ 7 php-fpm processes and ~ 8 getty processes and 3/4 of 1024 MB swap full and the server is out of memory!

I'm not a pro, but I'm pretty sure that's not right...

I think the crons have something to do with it. I have 3 jobs scheduled:

  • a simple one (read smtp for new mail) every minute
  • a big one (read RSS from ~ 30 blogs) every night
  • a simple one (mysqldump of 2 small databases) every morning

I'm not sure why I think that =) Probably because the simple job (SMTP, every minute) is always in the htop list. (But always with 0% cpu, 0% mem and 0:00:00 time...)

The 20 mysqld's are also very strange, but they don't seem to require a lot of memory.

The php-fpm's apparently do consume a lot of memory. In the 10 minutes it took to write this, the mem has gone from 66 MB to 120 MB! The top 6 mem consuming processes are php-fpm: pool www. When I restart /etc/init.d/php5-fpm the mem goes down to ~ 70 MB. How does php-fpm require 400+ MB of mem? What's up with that?

Swap has been pretty steady at ~ 98 MB the last 10 mins.

Anyone know what might be going on? (I know it's very little info on a whole server.) I can add details if you wish.

I'm not even running any decent sized websites!

More info:

A screen of htop --sort-key PERCENT_MEM: htop

Pastebin with ps xv, cat /proc/meminfo and top: http://pastebin.com/PfXeupMN

share|improve this question
1  
Can you post few iterations of top, ps -xv and a snapshot of /proc/meminfo in some pastebin link. Also, if you can show the oom messages it will be more clear. –  Soham Chakraborty Oct 2 '12 at 9:43
    
Can you paste your php-fpm pool configuration, as well as you mysql configuration. Also, it might be a good idea to run mysqltuner perl script and paste its output here –  Sibin Grasic Oct 27 '13 at 23:27

1 Answer 1

up vote 0 down vote accepted

There was something wrong in the server config (very very slow i/o) that was to blame. The vps provider did a hardware update (I think) and it was all fixed. Mem usage might still be high (I don't know) but overall the server is super fast again.

Sorry I didn't mention this before.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.