apache eats up too much ram per child
- by mrc4r7m4n
Hello to everyone.
I've got fallowing problem: Apache eat to many ram per child.
The fallowing comments shows:
cat /etc/redhat-release -- Fedora release 8 (Werewolf)
free -m:
total used free shared buffers cached
Mem: 3566 3136 429 0 339 1907
-/+ buffers/cache: 889 2676
Swap: 4322 0 4322
I know that you will say that there is nothing to worry about because swap is not use, but i think it's not use for now.
3.httpd -v:
Server version: Apache/2.2.14 (Unix)
4.httpd -l:
Compiled in modules:
core.c
mod_authn_file.c
mod_authn_default.c
mod_authz_host.c
mod_authz_groupfile.c
mod_authz_user.c
mod_authz_default.c
mod_auth_basic.c
mod_include.c
mod_filter.c
mod_log_config.c
mod_env.c
mod_setenvif.c
mod_version.c
mod_ssl.c
prefork.c
http_core.c
mod_mime.c
mod_status.c
mod_autoindex.c
mod_asis.c
mod_cgi.c
mod_negotiation.c
mod_dir.c
mod_actions.c
mod_userdir.c
mod_alias.c
mod_rewrite.c
mod_so.c
5.List of loaded dynamic modules:
LoadModule authz_host_module
modules/mod_authz_host.so LoadModule
include_module modules/mod_include.so
LoadModule log_config_module
modules/mod_log_config.so LoadModule
setenvif_module
modules/mod_setenvif.so LoadModule
mime_module modules/mod_mime.so
LoadModule autoindex_module
modules/mod_autoindex.so LoadModule
vhost_alias_module
modules/mod_vhost_alias.so LoadModule
negotiation_module
modules/mod_negotiation.so LoadModule
dir_module modules/mod_dir.so
LoadModule alias_module
modules/mod_alias.so LoadModule
rewrite_module modules/mod_rewrite.so
LoadModule proxy_module
modules/mod_proxy.so LoadModule
cgi_module modules/mod_cgi.so
6.My prefrok directive
<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 25
ServerLimit 80
MaxClients 80
MaxRequestsPerChild 4000
</IfModule>
KeepAliveTimeout 6
MaxKeepAliveRequests 100
KeepAlive On
7.top -u apache: ctrl+ M
top - 09:19:42 up 2 days, 19 min, 2 users, load average: 0.85, 0.87, 0.80
Tasks: 113 total, 1 running, 112 sleeping, 0 stopped, 0 zombie
Cpu(s): 7.3%us, 15.7%sy, 0.0%ni, 75.7%id, 0.0%wa, 0.7%hi, 0.7%si, 0.0%st
Mem: 3652120k total, 3149964k used, 502156k free, 348048k buffers
Swap: 4425896k total, 0k used, 4425896k free, 1944952k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16956 apache 20 0 700m 135m 100m S 0.0 3.8 2:16.78 httpd
16953 apache 20 0 565m 130m 96m S 0.0 3.7 1:57.26 httpd
16957 apache 20 0 587m 129m 102m S 0.0 3.6 1:47.41 httpd
16955 apache 20 0 567m 126m 93m S 0.0 3.6 1:43.60 httpd
17494 apache 20 0 626m 125m 96m S 0.0 3.5 1:58.77 httpd
17515 apache 20 0 540m 120m 88m S 0.0 3.4 1:45.57 httpd
17516 apache 20 0 573m 120m 88m S 0.0 3.4 1:50.51 httpd
16954 apache 20 0 551m 120m 88m S 0.0 3.4 1:52.47 httpd
17493 apache 20 0 586m 120m 94m S 0.0 3.4 1:51.02 httpd
17279 apache 20 0 568m 117m 87m S 16.0 3.3 1:51.87 httpd
17302 apache 20 0 560m 116m 90m S 0.3 3.3 1:59.06 httpd
17495 apache 20 0 551m 116m 89m S 0.0 3.3 1:47.51 httpd
17277 apache 20 0 476m 114m 81m S 0.0 3.2 1:37.14 httpd
30097 apache 20 0 536m 113m 83m S 0.0 3.2 1:47.38 httpd
30112 apache 20 0 530m 112m 81m S 0.0 3.2 1:40.15 httpd
17513 apache 20 0 516m 112m 85m S 0.0 3.1 1:43.92 httpd
16958 apache 20 0 554m 111m 82m S 0.0 3.1 1:44.18 httpd
1617 apache 20 0 487m 111m 85m S 0.0 3.1 1:31.67 httpd
16952 apache 20 0 461m 107m 75m S 0.0 3.0 1:13.71 httpd
16951 apache 20 0 462m 103m 76m S 0.0 2.9 1:28.05 httpd
17278 apache 20 0 497m 103m 76m S 0.0 2.9 1:31.25 httpd
17403 apache 20 0 537m 102m 79m S 0.0 2.9 1:52.24 httpd
25081 apache 20 0 412m 101m 70m S 0.0 2.8 1:01.74 httpd
I guess thats all information needed to help me solve this problem.
I think the virt memory is to big, the same res. The consumption of ram is increasing all the time. Maybe it's memory leak because i see there is so many static modules compiled.
Could someone help me with this issue? Thank you in advance.
8.ldd /usr/sbin/httpd
linux-gate.so.1 => (0x0012d000)
libm.so.6 => /lib/libm.so.6 (0x0012e000)
libpcre.so.0 => /lib/libpcre.so.0 (0x00157000)
libselinux.so.1 => /lib/libselinux.so.1 (0x0017f000)
libaprutil-1.so.0 => /usr/lib/libaprutil-1.so.0 (0x0019a000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x001b4000)
libldap-2.3.so.0 => /usr/lib/libldap-2.3.so.0 (0x001e6000)
liblber-2.3.so.0 => /usr/lib/liblber-2.3.so.0 (0x00220000)
libdb-4.6.so => /lib/libdb-4.6.so (0x0022e000)
libexpat.so.1 => /lib/libexpat.so.1 (0x00370000)
libapr-1.so.0 => /usr/lib/libapr-1.so.0 (0x00391000)
libpthread.so.0 => /lib/libpthread.so.0 (0x003b9000)
libdl.so.2 => /lib/libdl.so.2 (0x003d2000)
libc.so.6 => /lib/libc.so.6 (0x003d7000)
/lib/ld-linux.so.2 (0x00110000)
libuuid.so.1 => /lib/libuuid.so.1 (0x00530000)
libresolv.so.2 => /lib/libresolv.so.2 (0x00534000)
libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x00548000)
libssl.so.6 => /lib/libssl.so.6 (0x00561000)
libcrypto.so.6 => /lib/libcrypto.so.6 (0x005a6000)
libgssapi_krb5.so.2 => /usr/lib/libgssapi_krb5.so.2 (0x006d9000)
libkrb5.so.3 => /usr/lib/libkrb5.so.3 (0x00707000)
libcom_err.so.2 => /lib/libcom_err.so.2 (0x0079a000)
libk5crypto.so.3 => /usr/lib/libk5crypto.so.3 (0x0079d000)
libz.so.1 => /lib/libz.so.1 (0x007c3000)
libkrb5support.so.0 => /usr/lib/libkrb5support.so.0 (0x007d6000)
libkeyutils.so.1 => /lib/libkeyutils.so.1 (0x007df000)
Currently i cant restart the apache. I work in a company and now there is rush hours. I will do that about 5 pm.
Current top -u apache: shift + M
top - 12:31:33 up 2 days, 3:30, 1 user, load average: 0.73, 0.80, 0.79
Tasks: 114 total, 1 running, 113 sleeping, 0 stopped, 0 zombie
Cpu(s): 3.3%us, 4.7%sy, 0.0%ni, 90.0%id, 1.3%wa, 0.3%hi, 0.3%si, 0.0%st
Mem: 3652120k total, 3169720k used, 482400k free, 353372k buffers
Swap: 4425896k total, 0k used, 4425896k free, 1978688k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16957 apache 20 0 708m 145m 117m S 0.0 4.1 2:11.32 httpd
16956 apache 20 0 754m 142m 107m S 0.0 4.0 2:33.94 httpd
16955 apache 20 0 641m 136m 103m S 5.3 3.8 1:58.37 httpd
17515 apache 20 0 624m 131m 99m S 0.0 3.7 2:03.90 httpd
16954 apache 20 0 627m 130m 98m S 0.0 3.6 2:13.87 httpd
17302 apache 20 0 625m 124m 97m S 0.0 3.5 2:10.80 httpd
17403 apache 20 0 624m 114m 91m S 0.0 3.2 2:08.85 httpd
16952 apache 20 0 502m 114m 81m S 0.0 3.2 1:23.78 httpd
16186 apache 20 0 138m 61m 35m S 0.0 1.7 0:15.54 httpd
16169 apache 20 0 111m 49m 17m S 0.0 1.4 0:06.00 httpd
16190 apache 20 0 126m 48m 24m S 0.0 1.4 0:11.44 httpd
16191 apache 20 0 109m 48m 19m S 0.0 1.4 0:04.62 httpd
16163 apache 20 0 114m 48m 21m S 0.0 1.4 0:09.60 httpd
16183 apache 20 0 127m 48m 23m S 0.0 1.3 0:11.23 httpd
16189 apache 20 0 109m 47m 17m S 0.0 1.3 0:04.55 httpd
16201 apache 20 0 106m 47m 17m S 0.0 1.3 0:03.90 httpd
16193 apache 20 0 103m 46m 20m S 0.0 1.3 0:10.76 httpd
16188 apache 20 0 107m 45m 18m S 0.0 1.3 0:04.85 httpd
16168 apache 20 0 103m 44m 17m S 0.0 1.2 0:05.61 httpd
16187 apache 20 0 118m 41m 21m S 0.0 1.2 0:08.50 httpd
16184 apache 20 0 111m 41m 19m S 0.0 1.2 0:09.28 httpd
16206 apache 20 0 110m 41m 20m S 0.0 1.2 0:11.69 httpd
16199 apache 20 0 108m 40m 17m S 0.0 1.1 0:07.76 httpd
16166 apache 20 0 104m 37m 18m S 0.0 1.0 0:04.31 httpd
16185 apache 20 0 99.3m 36m 16m S 0.0 1.0 0:04.16 httpd
as you can see the memory usage growing up from e.g. res( 135 to 145)m and it will be growing up till memory ends. Are you sure that this option i set up:
<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 25
ServerLimit 80
MaxClients 80
MaxRequestsPerChild 4000
</IfModule>
KeepAliveTimeout 6
MaxKeepAliveRequests 100
KeepAlive On
are correct? Maybe i should decrease some of them?
Another questions that bother me: I got e.g. static module mod_negotiation.c compiled into apache and the same module loaded as dynamic. Is this normal that i've loaded duplicated module. But when i want to remove dynamic module(mod_negotiation.c) from httpd.conf and then restart apache error appears. Now I cant tell this error message because i cant restart apache :(
Hello again:)
This is memory usage just after restart apache:
top - 16:19:12 up 2 days, 7:18, 3 users, load average: 1.08, 0.91, 0.91
Tasks: 109 total, 2 running, 107 sleeping, 0 stopped, 0 zombie
Cpu(s): 17.0%us, 25.7%sy, 51.0%ni, 4.7%id, 0.0%wa, 0.3%hi, 1.3%si, 0.0%st
Mem: 3652120k total, 2762516k used, 889604k free, 361552k buffers
Swap: 4425896k total, 0k used, 4425896k free, 2020980k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13569 apache 20 0 93416 43m 15m S 0.0 1.2 0:02.55 httpd
13575 apache 20 0 98356 38m 16m S 32.3 1.1 0:02.55 httpd
13571 apache 20 0 86808 33m 12m S 0.0 0.9 0:02.60 httpd
13568 apache 20 0 86760 33m 12m S 0.0 0.9 0:00.81 httpd
13570 apache 20 0 83480 33m 12m S 0.0 0.9 0:00.51 httpd
13572 apache 20 0 63520 5916 1548 S 0.0 0.2 0:00.02 httpd
13573 apache 20 0 63520 5916 1548 S 0.0 0.2 0:00.02 httpd
13574 apache 20 0 63520 5916 1548 S 0.0 0.2 0:00.02 httpd
13761 apache 20 0 63388 5128 860 S 0.0 0.1 0:00.01 httpd
13762 apache 20 0 63388 5128 860 S 0.0 0.1 0:00.01 httpd
13763 apache 20 0 63388 5128 860 S 0.0 0.1 0:00.00 httpd
I will try to compile apache from source to newest version. Thx for help guys.
