reducing size of apache instances

John Almberg jalmberg at
Fri Sep 11 13:58:31 UTC 2009

Ivan Voras wrote:

> There is another thing you can try. Judging from the process size you've
> given it looks like you are not using PHP or a similar Apache module.
> Also, you didn't specify anything so I assume you are using the default
> configuration, which operates in "prefork" mode - MPM_PREFORK, which
> means a separate process is forked for every request.
> If all of this is true, you can trivially switch to the worker-threaded
> MPM in which every Apache process (which will be of comparable size to
> the one you currently have) will handle a large number of request. In
> effect, instead of e.g. 50 Apache processes active for 50 connections,
> you will have 2-3 Apache processes.
> Enable WITH_MPM=worker in /etc/make.conf to enable this.

I am using PHP, in fact. I've listed all the loaded modules below, and 
marked the ones I added with an '*'. I need the proxy modules because I 
use Apache as a front end for Mongrel.

BTW, this is Apache 2.2 on FreeBSD 7.1

This WITH_MPM=worker sounds interesting. I'll have to read up on it. I 
guess there is some downside to enabling it, like slower performance?

-- John

Loaded Modules:
  core_module (static)
  mpm_prefork_module (static)
  http_module (static)
  so_module (static)
  authn_file_module (shared)
  authn_dbm_module (shared)
  authn_anon_module (shared)
  authn_default_module (shared)
  authn_alias_module (shared)
  authz_host_module (shared)
  authz_groupfile_module (shared)
  authz_user_module (shared)
  authz_dbm_module (shared)
  authz_owner_module (shared)
  authz_default_module (shared)
  auth_basic_module (shared)
  auth_digest_module (shared)
  file_cache_module (shared)
  cache_module (shared)
  disk_cache_module (shared)
  dumpio_module (shared)
  include_module (shared)
  filter_module (shared)
  charset_lite_module (shared)
  deflate_module (shared)
  log_config_module (shared)
  logio_module (shared)
  env_module (shared)
  mime_magic_module (shared)
  cern_meta_module (shared)
  expires_module (shared)
  headers_module (shared)
  usertrack_module (shared)
  unique_id_module (shared)
  setenvif_module (shared)
  version_module (shared)
  *proxy_module (shared)
  *proxy_http_module (shared)
  *proxy_balancer_module (shared)
  *ssl_module (shared)
  mime_module (shared)
  *dav_module (shared)
  status_module (shared)
  autoindex_module (shared)
  asis_module (shared)
  info_module (shared)
  cgi_module (shared)
  dav_fs_module (shared)
  vhost_alias_module (shared)
  negotiation_module (shared)
  dir_module (shared)
  imagemap_module (shared)
  actions_module (shared)
  speling_module (shared)
  userdir_module (shared)
  alias_module (shared)
  *rewrite_module (shared)
  *php5_module (shared)
Syntax OK

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