I have heard that disabling unneeded Apache modules can improve performance on a web server. I cannot find a list of modules broken down by necessity. What Apache modules are absolute crucial? And which ones are "install as needed only:?

Here is what I am running on a VPS with 256K ram, Apache 2.054 CentOS 3.5:

cgi_module, cgid_module, access_module,auth_module, auth_anon_module, auth_dbm_module, auth_digest_module, cache_module, disk_cache_module, mem_cache_module, ext_filter_module, include_module, deflate_module
, log_config_module , env_module , mime_magic_module , cern_meta_module , expires_module , headers_module, , usertrack_module , unique_id_module, setenvif_module, proxy_module , proxy_connect_module
, proxy_ftp_module , proxy_http_module , mime_module , dav_module , status_module , autoindex_module, , asis_module,, info_module, suexec_module, dav_fs_module, vhost_alias_module, negotiation_module
, dir_module, imap_module, actions_module, speling_module , userdir_module , alias_module, rewrite_module , security_module , evasive20_module

Which of these can be safely disabled?
Thank you in advance.

Van

Hard to tell not knowing which ones you might be using ...



Cheers,
Tink

The modules listed are all installed and running. How can I determine which ones are being actually used?