Wordpress & 32MB Of Ram.. -- Assistance?

eastonch · July 2012

Hi guys, I currently own a prometeus VPS with 128MB of ram, but. I'm using this as a test bench for my IPXCore, until that's back up and running.

I'm finding it rather hard to acheive a WP blog with less than 32MB of ram -- I got one running, with MySQL taking 15%, Apache taking 15% memory and using just under 100MB of ram.

Here's my PS AUX for anybody who might be able to help.
I have heard that NGINX might be a better option -- Opinion?

 
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.1   2028   168 ?        Ss   01:17   0:00 init [2]
root         2  0.0  0.0      0     0 ?        S    01:17   0:00 [kthreadd/578]
root         3  0.0  0.0      0     0 ?        S    01:17   0:00 [khelper/578]
root       461  0.0  0.6   9208   812 ?        Ss   01:17   0:00 /usr/sbin/nmbd
root       488  0.0  0.8  16556  1164 ?        Ss   01:17   0:00 /usr/sbin/smbd
root       489  0.0  0.0   8668   100 ?        Ss   01:17   0:00 /usr/sbin/sasla
root       492  0.0  0.0   8668    16 ?        S    01:17   0:00 /usr/sbin/sasla
root       496  0.0  0.0   5368    96 ?        S    01:17   0:00 supervising sys
root       497  0.0  1.3   6008  1776 ?        Ss   01:17   0:01 /usr/sbin/syslo
root       505  0.0  0.3  16556   416 ?        S    01:17   0:00 /usr/sbin/smbd
root       526  0.0  0.2   2084   300 ?        Ss   01:17   0:00 /usr/sbin/dropb
bind       553  0.0  1.0  48876  1388 ?        Ssl  01:17   0:00 /usr/sbin/named
root       580  0.0  0.1   2392   144 ?        Ss   01:17   0:00 /usr/sbin/xinet
root       592  0.0  0.4   2676   548 ?        S    01:17   0:00 /bin/sh /usr/bi
root       626  0.0  0.4  10600   544 ?        Ss   01:17   0:01 sendmail: MTA:
mysql      715  0.0  3.0 156040  4004 ?        Sl   01:17   0:08 /usr/sbin/mysql
root       716  0.0  0.0   1668    16 ?        S    01:17   0:00 logger -t mysql
root       851  0.0  0.7  36964  1036 ?        Ss   01:17   0:01 /usr/sbin/apach
www-data   861  0.1 15.2  54396 20048 ?        S    01:17   0:55 /usr/sbin/apach
root       880  0.0  0.2   2288   320 ?        Ss   01:17   0:00 /usr/sbin/cron
www-data   900  0.1 14.2  54372 18676 ?        S    01:17   0:55 /usr/sbin/apach
www-data   942  0.1 15.3  54396 20096 ?        S    01:35   0:53 /usr/sbin/apach
root      5503  2.1  0.8   2400  1116 ?        Ss   14:29   0:00 /usr/sbin/dropb
root      5504  0.0  1.2   2960  1604 pts/0    Ss   14:29   0:00 -bash
root      5508  0.0  0.7   2348   932 pts/0    R+   14:29   0:00 ps aux

And Free -m...


             total       used       free     shared    buffers     cached
Mem:           128         79         48          0          0         23
-/+ buffers/cache:         55         72
Swap:          128         26        101

And HTOP

MrAndroid · July 2012

Give the output of free -m

rds100 · July 2012

Why do you need mysqld? Sqlite might be an option.
Also - you have samba running there??? Why? And why apache?

eastonch · July 2012

Daniel, pop on skype? -- Also, post updated to include info.

BluBoy · July 2012

We'd need to see your my.cnf, nginx.conf and php.ini/php-fpm.conf files.

I have it running comfortably on a 128MB VPS (ignore the recent surge in 'other'... Just doing some testing)

jcaleb · July 2012

use minstall first

eastonch · July 2012

Going to migrate to Nginx... Will post results :']

jcaleb · July 2012

minstall will optimize memory usage. even also mysql

ErawanArifNugroho · July 2012

purge apache samba bind9 portmap
install nginx

and then tweak the mysql /etc/mysql/conf.d/lowend.cnf :

[mysqld]

key_buffer = 16K
max_allowed_packet = 1M
table_cache = 4
sort_buffer_size = 64K
read_buffer_size = 256K
read_rnd_buffer_size = 256K
net_buffer_length = 2K
thread_stack = 64K
default-storage-engine = MYISAM
skip-innodb
thread_concurrency = 2

You could get less memory if you use Openvz. But ofcourse using Minstall will lower your memory usage

eastonch · July 2012

Using OVZ ;'] and thanks, i'll take it into consideration. I tried the LeS -- Seemed to break for me; I had VirtualHosts working fine with Apache, how do I do such a thing with NGINX? I've never actually played with it, and I Was using A2ENSITE to setup the websites. Is it similar? :S

ElliotJ · July 2012

@dmmcintyre3 is the man to speak to about this.
He got WP running on a 16MB OpenVZ vps with vSwap.

ErawanArifNugroho · July 2012

What os do you use?

jcaleb · July 2012

@dmmcintyre3 please post tutorial for wp

djvdorp · July 2012

@BluBoy what script is that? Looks hot.

Maounique · July 2012

It can be done in 32 MB ram, but it is not the idle stuff that matters, but actually the visitors take RAM.
IMO 64 MB will be enough for 3-4 visitors without using much swap. Anything above 1 will make 32 go wild on abusing resources, with very careful tweaking maybe you can hold 2, perhaps 3 if they read slowly.
Any more tweaking than that is art and cant be really put into a tutorial :P
M

ElliotJ · July 2012

@Maounique said: It can be done in 32 MB ram, but it is not the idle stuff that matters, but actually the visitors take RAM.

IMO 64 MB will be enough for 3-4 visitors without using much swap. Anything above 1 will make 32 go wild on abusing resources, with very careful tweaking maybe you can hold 2, perhaps 3 if they read slowly.
Any more tweaking than that is art and cant be really put into a tutorial :P
M

You could do more than that, sorta.

Presuming that the WordPress site is largely static, and you aren't posting much daily, you could set NGINX to cache everything (excluding the wp-admin folder) therefore reducing the PHP/MySQL requests dramatically.

If LowEndBox didn't have comments, for example, then that would work perfectly.

Maounique · July 2012

If we speak of concurrent 2-3 ppl at a time, then it cant be that static. Unless you disable comments or something.
M

djvdorp · July 2012

@ElliotJ said: If LowEndBox didn't have comments, for example, then that would work perfectly.

Or if we used Disqus or something like FB Comments

eastonch · July 2012

Valid points -- However I was hoping for a comments section, but this could be acheived through DisQus or something similar. Posts would be made infrequently, mainly any "tech" shit i get involved in, VPS Reviews, etc.. -- I'd have Crayon Syntax hilightling for PHP; bash; etc.

So -- that's additional memory usage there.

ElliotJ · July 2012

@djvdorp said: Or if we used Disqus or something like FB Comments

In that case, ditch WordPress and go for something like Jekyll or Octopress.
Oh and use thttpd.

djvdorp · July 2012

@ElliotJ said: In that case, ditch WordPress and go for something like Jekyll or Octopress.

Oh and use thttpd.

I see your point

eastonch · July 2012

FlatPress looked appealing, or should i saw appaling? ;']

jboogie · July 2012

@ElliotJ said: go for something like Jekyll

that seems insanely cool... it's even possible to export posts directly from emacs' org-mode... thanks for heads up

eastonch · July 2012

Ok, so I slapped a few changes on, used minstall for optimal, installed Wordpress, got it to using 38.5MB idle with me browsing from my home net..

This is literally a fresh install, minstall'd and wordpress slapped on with some Nginx config.

here's my new HTOP... Anybody feel like giving me some further optimization? I feel like I could lose fail2ban and go for something more lightweight, not sure though.. thoughts?

MySQL seems optimized as far as I can go, using it without INNODB and other bloat, used minstall to configure the optimization of it.

php-fpm: pool chris seems to be using the most out of anything, that's clearly the php service, right?

ErawanArifNugroho · July 2012

Yes, with Minstall, we serve the php file using php5-fpm

jcaleb · July 2012

Could you share your mysql config?

eastonch · July 2012

I can't see how my MySQL config would help, since it's using minimal memory, is there any optimisation techniques for PHP5-FPM? @ErawanArifNugroho

Also.. My MySQL Config, @jcaleb

[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock

[mysqld]
bind-address = 127.0.0.1
port = 3306
socket = /var/run/mysqld/mysqld.sock
user = mysql
basedir = /usr
datadir = /var/lib/mysql
language = /usr/share/mysql/english
pid-file = /var/run/mysqld/mysqld.pid
skip-external-locking
tmpdir = /tmp

[mysqldump]
quick
max_allowed_packet = 16M

[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M

!includedir /etc/mysql/conf.d/

inside the conf.d ....
innodb.cnf

[mysqld]
default-storage-engine = myisam
innodb = off

inside lowmem.cnf

[mysqld]
key_buffer_size = 8M
max_allowed_packet = 1M
max_connections = 20
max_heap_table_size = 4M
net_buffer_length = 2K
query_cache_limit = 256K
query_cache_size = 4M
read_buffer_size = 256K
read_rnd_buffer_size = 256K
sort_buffer_size = 64K
table_open_cache = 256
thread_stack = 128K

inside mysqld_safe_syslog.cnf

[mysqld_safe]
syslog

sleddog · July 2012

@Maounique said: It can be done in 32 MB ram, but it is not the idle stuff that matters, but actually the visitors take RAM.

So true

eastonch · July 2012

@Sleddog & @Maounique I got it idle at around 12MB, but as soon as somebody accesses the website, it jumps to 38MB and creeps to 50-66mb upon extra visitors..

ErawanArifNugroho · July 2012

@eastnoch : The PHP5-FPM is already optimized if we are using Minstall
I'm using it also for running my blog which running in a KVM vps from Prometeus.

eastonch · July 2012

@ErawanArifNugroho True, but there must be further methods to reduce it's usage.

@MrLadoodle had his running quite slim, can't remember how he did it tho.

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