Hello,
It seems that if I use mod_deflate to compress zope's responses, I take a
major hit -- around 1.4 seconds without compression and around 16.4 seconds
with. I can't figure out what I'm doing wrong here.
I have zope 2.7.7 running with the fast-cgi ZServer enabled. Urls beginning
with http://pkfinance.info/pkf-z1/ go to Zope. Here's what I see:
a% /usr/bin/time curl -v -o /dev/null
* About to connect() to pkfinance.info <http://pkfinance.infoport 80
* Trying 207.210.209.230 connected
* Connected to pkfinance.info <http://pkfinance.info>
(207.210.209.230<http://207.210.209.230>)
port 80
GET /pkf-z1/news/index_html HTTP/1.1
User-Agent: curl/7.14.0 (i386-portbld-freebsd4.11) libcurl/7.14.0
SSL/0.9.7d zlib/1.1.4
Host: pkfinance.info <http://pkfinance.info>
Accept: */*
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 0:00:01 0< HTTP/1.1 200 K
< Date: Wed, 17 Aug 2005 06:57:57 GMT
< Server: Apache/2.0.54 (FreeBSD) DAV/2 PHP/4.3.11 mod_webkit2/0.5
mod_fastcgi/2.4.2
< X-Powered-By: Zope (www.zope.org <http://www.zope.org>), Python (
www.python.org <http://www.python.org>)
< Content-Length: 65751
< Vary: Accept-Encoding,User-Agent
< Content-Type: text/html; charset=IS
100 65751 100 65751 0 0 44744 0 0:00:01 0:00:01 196k* Connection #0
to host pkfinance.info <http://pkfinance.infoleft intact
* Closing connection #0
1.48 real 0.00 user 0.00 sys
a%
a% /usr/bin/time curl -v -o /dev/null
* About to connect() to pkfinance.info <http://pkfinance.infoport 80
* Trying 207.210.209.230 connected
* Connected to pkfinance.info <http://pkfinance.info>
(207.210.209.230<http://207.210.209.230>)
port 80
GET /pkf-z1/news/index_html HTTP/1.1
User-Agent: curl/7.14.0 (i386-portbld-freebsd4.11) libcurl/7.14.0
SSL/0.9.7d zlib/1.1.4
Host: pkfinance.info <http://pkfinance.info>
Accept: */*
Accept-Encoding: deflate, gzip
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 0:00:01 0< HTTP/1.1 200 K
< Date: Wed, 17 Aug 2005 07:00:10 GMT
< Server: Apache/2.0.54 (FreeBSD) DAV/2 PHP/4.3.11 mod_webkit2/0.5
mod_fastcgi/2.4.2
< X-Powered-By: Zope (www.zope.org <http://www.zope.org>), Python (
www.python.org <http://www.python.org>)
< Content-Length: 65751
< Vary: Accept-Encoding,User-Agent
< Content-Encoding: gzip
< Content-Type: text/html; charset=IS
13 65751 13 8719 0 0 530 0 0:02:04 0:00:16 0:01:48 0transfer closed with
57032 bytes remaining to read
13 65751 13 8719 0 0 530 0 0:02:04 0:00:16 0:01:48 0* Closing connection #0
curl: (18) transfer closed with 57032 bytes remaining to read
16.46 real 0.01 user 0.01 sys
a%
The relevant bits of my httpd.conf:
<IfModule mod_fastcgi.c>
FastCgiExternalServer / -socket
/ -pass-header Authorization
</IfModule>
<VirtualHost *>
ServerName pkfinance.info <http://pkfinance.info>
ServerAlias www.pkfinance.info <http://www.pkfinance.info>
ServerAdmin faried (AT) gmail (DOT) com
DocumentRoot /
ErrorLog /
CustomLog / combined
# zope
<IfModule mod_fastcgi.c>
<Location /pkf-z1>
SetHandler fastcgi-script
SFilter DEFLATE
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
# BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
Header append Vary User-Agent env=!dont-vary
</Location>
DeflateFilterNote Input instream
DeflateFilterNote outstream
DeflateFilterNote Ratio ratio
LogFormat '%t "%r" %{outstream}n/%{instream}n (%{ratio}n%%)' deflate
CustomLog / deflate
</IfModule>
</VirtualHost>
In my deflate log I see stuff like
[16/Aug/2005:11:40:03 -0500] "GET /pkf-z1/news/index_html HTTP/1.1"
8852/64328 (13%)
Thanks,
Faried.
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Faried Nawaz wrote:

It seems that if I use mod_deflate to compress zope's responses, I take a
major hit -- around 1.4 seconds without compression and around 16.4 seconds
with. I can't figure out what I'm doing wrong here.

I have zope 2.7.7 running with the fast-cgi ZServer enabled. Urls beginning
with http://pkfinance.info/pkf-z1/ go to Zope. Here's what I see:

You seem to be running Apache and Zope on the same host, and trying to
use the same constrained resource (CPU) from each. You might be able to
improve performance by running Apache on a separate box, where it won't
"steal" CPU from Zope to do the compression.

Tres.
- --
Tres Seaver +1 202-558-7113 tseaver (AT) palladion (DOT) com
Palladion Software "Excellence by Design" http://palladion.com
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I tried messing with it some more, and it seems that the fix was to place

<tal:foo define="ret python:
(container.REQUEST)"
tal:omit-tag="" />

somewhere near the top of my template. I didn't realize I needed
compression enabled in zope; I thought apache's mod_deflate would be
sufficient.

Someone should add this to the docs or wiki or someplace.

Faried.

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8/18/05, Dieter Maurer <dieter (AT) handshake (DOT) dewrote:
Looks as if you should not use "mod_deflate".

Zope can perform "gzip" compression by itself.

As you probably read in my previous email, I have rules defined in
Apache to handle various browsers and proxies when dealing with
possibly gzip'd content. How do I do the same in Zope?

(Also, I have static content on the site that can benefit from mod_deflate.)

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