Mailing-List: contact users-help@httpd.apache.org; run by ezmlm
Precedence: bulk
Reply-To: users@httpd.apache.org
Received-SPF: pass (herse.apache.org: domain of jultus@gmail.com designates
 64.233.166.176 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=beta;
        h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition;
        b=lQUsmVo2U2fUMzbOJbrtHBELriKXIW50HgWvADBiyVu6grGnl+0kDoPVook+qQMxA6dt0HeBWo3ywJ8hz8YTjEJAylUi3xZhSSCYIzXurpWTz2Q0s5ZSiOcSJhssDu9Da/ndP8zPtMFhMZjUrV4u5x0VfEX9F+u34m/5+rhi0gQ=
Message-ID: <f4c0fea20707011117u7bd8273bm636f20a251b436cd@mail.gmail.com>
Date: Sun, 1 Jul 2007 20:17:52 +0200
From: "Julius Thyssen" <jultus@gmail.com>
To: users@httpd.apache.org
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Subject: [users@httpd] performance and mod_deflate optimization

Hi,

I'm trying to optimize speed by using mod_deflate
on a particular personal server. It runs Apache
httpd 2.052+ and PHP Version 5.1.6, with eaccellerator,
on Linux 2.6.9-023stab033.6 SMP kernel for CentOS 4.5.

Roughly, it serves 5 websites, combined they get
about 1 real human visit each second in total
(excluding redirected hits, blocked spammers/IPs/robots/spiders).
One of the sites is behind SSL, for squirrelmail webmail.
Most filetypes it serves are php (flatfile non-mysql weblogs),
a few text and .htm* files, a very small cgi-script here and there
(and a couple of imagefiles, avi's and mp3's, but not very much).
Bandwidth/traffic are no problem factors for this server, it runs
with a 100 mbit NIC to the net, and I can use it wide-open.
Currently it uses about 210 MB of DDR3, and I have at least
another 128 MB of RAM left, and CPU also has room to do more.

>From the current httpd.conf :

# added gzip for mod_deflate:
#<Location />
SetOutputFilter DEFLATE
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
SetEnvIfNoCase Request_URI
\.(?:gif|jpe?g|png|wav|mp3|ogg|bmp|avi|mpg)$ no-gzip dont-vary
Header append Vary User-Agent env=!dont-vary
DeflateCompressionLevel 5
DeflateMemLevel 9
DeflateWindowSize 14
#</Location>
#AddOutputFilterByType DEFLATE text/html text/plain text/xml

(When I uncomment the Location tags, Apache won't start.
Haven't figured out why, but doesn't seem to matter,
since I'm running it for all the sites anyway.)

This httpd.conf has had a pretty long life, so I forgot
much of what I've changed over the years. But I was
wondering how I could better load speeds for php webpages
using mod_deflate, and also, handy pointers on how to best
measure this perhaps, although I don't have very much
time to spend on that. I just wonder if any of you
sees really strange or bad general config values.

For that I'm posting some other more or less
crucial values from the same conf:

Timeout 120
KeepAlive On
MaxKeepAliveRequests 60
KeepAliveTimeout 22
# SendBufferSize 16384

<IfModule prefork.c>
StartServers       8
MinSpareServers    4
MaxSpareServers   16
ServerLimit      256
MaxClients       256
MaxRequestsPerChild  800
</IfModule>

<IfModule worker.c>
StartServers         4
MaxClients         128
MinSpareThreads     16
MaxSpareThreads     70
ThreadsPerChild     24
MaxRequestsPerChild  800
</IfModule>

LoadModule access_module modules/mod_access.so
LoadModule auth_module modules/mod_auth.so
LoadModule auth_anon_module modules/mod_auth_anon.so
LoadModule auth_dbm_module modules/mod_auth_dbm.so
LoadModule auth_digest_module modules/mod_auth_digest.so
LoadModule ldap_module modules/mod_ldap.so
#LoadModule auth_ldap_module modules/mod_auth_ldap.so
#LoadModule include_module modules/mod_include.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule env_module modules/mod_env.so
LoadModule mime_magic_module modules/mod_mime_magic.so
#LoadModule cern_meta_module modules/mod_cern_meta.so
LoadModule expires_module modules/mod_expires.so
LoadModule deflate_module modules/mod_deflate.so
LoadModule headers_module modules/mod_headers.so
#LoadModule usertrack_module modules/mod_usertrack.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule mime_module modules/mod_mime.so
#LoadModule dav_module modules/mod_dav.so
#LoadModule status_module modules/mod_status.so
LoadModule autoindex_module modules/mod_autoindex.so
LoadModule asis_module modules/mod_asis.so
#LoadModule info_module modules/mod_info.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule vhost_alias_module modules/mod_vhost_alias.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule dir_module modules/mod_dir.so
LoadModule imap_module modules/mod_imap.so
LoadModule actions_module modules/mod_actions.so
LoadModule speling_module modules/mod_speling.so
CheckSpelling on
#LoadModule userdir_module modules/mod_userdir.so
LoadModule alias_module modules/mod_alias.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule cache_module modules/mod_cache.so
LoadModule suexec_module modules/mod_suexec.so
LoadModule disk_cache_module modules/mod_disk_cache.so
LoadModule file_cache_module modules/mod_file_cache.so
LoadModule mem_cache_module modules/mod_mem_cache.so
LoadModule cgi_module modules/mod_cgi.so
# added april 2007:
LoadFile /usr/lib/libxml2.so
LoadModule unique_id_module modules/mod_unique_id.so
LoadModule security2_module modules/mod_security2.so
#LoadModule evasive20_module modules/mod_evasive20.so

Those last ones I'm still experimenting with.
For now I use mod_security with only very basic defaults.
This server doesn't really suffer from DDoS attacks often.

Any advice or improvements highly appreciated.


Regards,


Julius

---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
   "   from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org