All,
I've a apache web server with 600 web sites as reverse proxy. The average of req. is more than 100 req/sec during all the day.
The apache is a 2.2.15 release 56.el6_8.3 (RedHat 6.x system up to date) + mod_ssl.
Every 10 days, the system has problems, and in the error log i found dozen of:
[error] (12)Cannot allocate memory: fork: Unable to fork new process
The temporary solution for me is the following: after an alert mail from the system monitoring server, I must restart the httpd using:
service httpd stop; killall httpd.worker; killall -9 httpd.worker; service httpd start
Adding more ram to the system does not help.
Any suggestion?
Best regards
apachectl -l
Compiled in modules:
core.c
worker.c
http_core.c
mod_so.c
apachectl -M
Loaded Modules:
core_module (static)
mpm_worker_module (static)
http_module (static)
so_module (static)
log_post_module (shared)
evasive20_module (shared)
auth_basic_module (shared)
auth_digest_module (shared)
authn_file_module (shared)
authn_alias_module (shared)
authn_anon_module (shared)
authn_dbm_module (shared)
authn_default_module (shared)
authz_host_module (shared)
authz_user_module (shared)
authz_owner_module (shared)
authz_groupfile_module (shared)
authz_dbm_module (shared)
authz_default_module (shared)
ldap_module (shared)
authnz_ldap_module (shared)
include_module (shared)
log_config_module (shared)
logio_module (shared)
env_module (shared)
ext_filter_module (shared)
mime_magic_module (shared)
expires_module (shared)
deflate_module (shared)
headers_module (shared)
usertrack_module (shared)
setenvif_module (shared)
mime_module (shared)
dav_module (shared)
status_module (shared)
autoindex_module (shared)
info_module (shared)
dav_fs_module (shared)
vhost_alias_module (shared)
negotiation_module (shared)
dir_module (shared)
actions_module (shared)
speling_module (shared)
userdir_module (shared)
alias_module (shared)
substitute_module (shared)
rewrite_module (shared)
proxy_module (shared)
proxy_balancer_module (shared)
proxy_ftp_module (shared)
proxy_http_module (shared)
proxy_ajp_module (shared)
proxy_connect_module (shared)
cache_module (shared)
suexec_module (shared)
disk_cache_module (shared)
cgi_module (shared)
version_module (shared)
unique_id_module (shared)
ssl_module (shared)
reqtimeout_module (shared)
Syntax OK
