Bug#345260: Occasional abnormal memory usage growth
This is a respond to:
"Debian Bug report logs - #345260
Apache2-mpm-worker 2.0.55-3 crashing box, memory leak?"
I experienced the same problem (sometimes (rarely) an apache2 process is born, which momentally eates all the memory (>1Gb)), while the configiration of apache is quite different:
apache2 -V:
Server version: Apache/2.2.4 (Debian)
Server built: Aug 8 2007 15:37:57
Server's Module Magic Number: 20051115:5
Server loaded: APR 1.2.11, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
Architecture: 32-bit
Server MPM: Prefork
threaded: no
forked: yes (variable process count)
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/prefork"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT=""
-D SUEXEC_BIN="/usr/lib/apache2/suexec"
-D DEFAULT_PIDLOG="/var/run/apache2.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_LOCKFILE="/var/run/apache2/accept.lock"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types"
-D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf"
dpkg -l | grep apache2 :
hi apache2 2.2.4-3
hi apache2-doc 2.2.4-3
hi apache2-mpm-prefork 2.2.4-3
hi apache2-utils 2.2.4-3
hi apache2.2-common 2.2.4-3
hi libapache2-mod-apreq2 2.08-5
hi libapache2-mod-auth-pam 1.1.1-6.1
hi libapache2-mod-auth-plain 2.0.48-4-2.2
hi libapache2-mod-auth-shadow 2.1-2
hi libapache2-mod-auth-sys-group 1.1.1-6.1
hi libapache2-mod-evasive 1.10.1-1
hi libapache2-mod-ldap-userdir 1.1.11-3
hi libapache2-mod-php5 5.2.3-1+b1
hi libapache2-mod-scgi 1.12-0.2
hi libapache2-mod-vhost-hash-alias 1.0-2
notice, apache2-mpm-prefork, not Apache2-mpm-worker.
Modules loaded:
ls /etc/apache2/mods-enabled/ | grep load
alias.load@
auth_basic.load@
authn_file.load@
auth_pam.load@
auth_sys_group.load@
authz_default.load@
authz_groupfile.load@
authz_host.load@
authz_user.load@
autoindex.load@
cgi.load@
dir.load@
env.load@
ldap_userdir.load@
mime.load@
negotiation.load@
php5.load@
rewrite.load@
setenvif.load@
status.load@
suexec.load@
userdir.load@
The problem was worked around by adding to the beginning of /etc/init.d/apache2 a string:
ulimit -v 102400
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