Hi Folks,
I'm having trouble with Apache/Django memory usage on a Virtual Private
Server. I only have 150Mb memory.
I've turned KeepAlive off. I think I'm using prefork (how do I tell?) and
it's set at the following:
<IfModule mpm_prefork_module>
StartServers 2
MinSpareServers 1
MaxSpareServers 5
MaxClients 40
MaxRequestsPerChild 100
ServerLimit 30
</IfModule>
php is also installed, and I have some sites using it, but I only started
getting these out of memory errors after adding django stuff in, and then
only recently.
I've just restarted apache, exim4, spamassassin etc, and top is giving me:
top - 22:54:32 up 4:13, 1 user, load average: 1.01, 0.85, 0.76
Tasks: 59 total, 2 running, 57 sleeping, 0 stopped, 0 zombie
Cpu(s): 6.6%us, 0.7%sy, 0.0%ni, 56.2%id, 36.5%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 145648k total, 141976k used, 3672k free, 552k buffers
Swap: 262136k total, 23728k used, 238408k free, 20972k cached
which i think means I'm swapping.
Doing a ps aux gives only the following processes using double figures % of
memory:
www-data 5103 0.1 13.4 38408 19568 ? S 22:39
0:01 /usr/sbin/apache2 -k start
www-data 5104 0.8 14.4 38696 21088 ? S 22:39
0:08 /usr/sbin/apache2 -k start
www-data 5118 0.3 13.7 38060 20064 ? S 22:39
0:03 /usr/sbin/apache2 -k start
www-data 5128 0.0 11.6 37220 17000 ? S 22:40
0:00 /usr/sbin/apache2 -k start
www-data 5129 0.3 13.6 36588 19816 ? S 22:40
0:03 /usr/sbin/apache2 -k start
root 5478 0.0 13.2 33324 19328 ? Ss 22:47
0:00 /usr/sbin/spamd --create-prefs --max-children
1 --helper-home-dir -d --pidfile=/v
root 5480 0.0 18.9 35800 27588 ? S 22:47 0:00 spamd child
The problem I had a 5.30pm tonight was a total lack of memory,
from /var/log/messages:
Apr 17 18:28:35 tsawyer kernel: Mem-info:
Apr 17 18:28:35 tsawyer kernel: Normal per-cpu:
Apr 17 18:28:35 tsawyer kernel: CPU 0: Hot: hi: 42, btch: 7 usd: 31
Cold: hi: 14, btch: 3 usd: 2
Apr 17 18:28:35 tsawyer kernel: Active:16505 inactive:16320 dirty:0
writeback:0 unstable:0 free:389 slab:2005 mapped:35 pagetables:585
Apr 17 18:28:35 tsawyer kernel: Normal free:1556kB min:1560kB low:1948kB
high:2340kB active:66020kB inactive:65280kB present:152400kB pages_scanne
d:310107 all_unreclaimable? yes
Apr 17 18:28:35 tsawyer kernel: lowmem_reserve[]: 0 0
Apr 17 18:28:35 tsawyer kernel: Normal: 1*4kB 8*8kB 15*16kB 5*32kB 1*64kB
0*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 1556kB
Apr 17 18:28:35 tsawyer kernel: Swap cache: add 2420111, delete 2420037, find
844817/1198912, race 8+3621
Apr 17 18:28:35 tsawyer kernel: Free swap = 0kB
Apr 17 18:28:35 tsawyer kernel: Total swap = 262136kB
Apr 17 18:28:35 tsawyer kernel: Free swap: 0kB
Apr 17 18:28:35 tsawyer kernel: 38400 pages of RAM
Apr 17 18:28:35 tsawyer kernel: 0 pages of HIGHMEM
Apr 17 18:28:35 tsawyer kernel: 1988 reserved pages
Apr 17 18:28:35 tsawyer kernel: 246 pages shared
Apr 17 18:28:35 tsawyer kernel: 74 pages swap cached
How I can reduce the memory usage? Any pointers appreciated.
Thanks,
Tim.
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