падает apache

[kery]

Несколько раз в день падает apache, система centos 6.5 оперативки 1 гб.

Code: Select all

[Mon Sep 22 07:19:56 2014] [notice] caught SIGTERM, shutting down
[Mon Sep 22 07:19:57 2014] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Mon Sep 22 07:19:58 2014] [notice] ModSecurity for Apache/2.7.3 (http://www.modsecurity.org/) configured.
[Mon Sep 22 07:19:58 2014] [notice] ModSecurity: APR compiled version="1.3.9"; loaded version="1.3.9"
[Mon Sep 22 07:19:58 2014] [notice] ModSecurity: PCRE compiled version="7.8 "; loaded version="7.8 2008-09-05"
[Mon Sep 22 07:19:58 2014] [notice] ModSecurity: LUA compiled version="Lua 5.1"
[Mon Sep 22 07:19:58 2014] [notice] ModSecurity: LIBXML compiled version="2.7.6"
[Mon Sep 22 07:19:58 2014] [notice] Digest: generating secret for digest authentication ...
[Mon Sep 22 07:19:58 2014] [notice] Digest: done
[Mon Sep 22 07:19:59 2014] [notice] mod_ruid2/0.9.4 enabled
[Mon Sep 22 07:19:59 2014] [notice] Apache/2.2.15 (Unix) DAV/2 mod_ssl/2.2.15 OpenSSL/1.0.0-fips mod_fcgid/2.3.9 PHP/5.3.3 configured -- resuming normal operations
[Mon Sep 22 07:59:47 2014] [emerg] (13)Permission denied: couldn't grab the accept mutex
[Mon Sep 22 07:59:48 2014] [alert] Child 27891 returned a Fatal error... Apache is exiting!
[Mon Sep 22 07:59:48 2014] [emerg] (43)Identifier removed: couldn't grab the accept mutex
[Mon Sep 22 07:59:48 2014] [emerg] (43)Identifier removed: couldn't grab the accept mutex
[Mon Sep 22 07:59:48 2014] [emerg] (43)Identifier removed: couldn't grab the accept mutex
[Mon Sep 22 07:59:48 2014] [emerg] (43)Identifier removed: couldn't grab the accept mutex
[Mon Sep 22 07:59:48 2014] [emerg] (43)Identifier removed: couldn't grab the accept mutex
[Mon Sep 22 07:59:48 2014] [emerg] (43)Identifier removed: couldn't grab the accept mutex
[Mon Sep 22 07:59:50 2014] [emerg] (22)Invalid argument: couldn't release the accept mutex

В чем может быть проблема