httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Anthony J. Biacco" <abia...@formatdynamics.com>
Subject RE: [users@httpd] Threaded MPM + mod_php/mod_python/mod_perl/mod_ruby.. thread safe?
Date Wed, 11 Feb 2009 16:29:43 GMT
It can pretty much be said about anything that uses libraries that are
not thread-safe, yes. While things like mod_perl are thread safe with
ithreads as far as apache is concerned, mod_perl won't guarantee the
thread-safeness of talking to the libraries, nor will any other mod_*
probably that uses that library. You have to check yourself which
libraries are ok, and which are not when you decide whether you can go
with the worker mpm or not. Or, in my case, with php I went with the
mod_fastcgi and the fcgi version of php. I simply don't have a whole lot
of php requests. But YMMV.

-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com

-----Original Message-----
From: howard chen [mailto:howachen@gmail.com] 
Sent: Wednesday, February 11, 2009 9:08 AM
To: users@httpd.apache.org
Subject: [users@httpd] Threaded MPM +
mod_php/mod_python/mod_perl/mod_ruby.. thread safe?

Hello,

According to PHP install guide, it said...

------------------------
http://hk.php.net/manual/en/faq.installation.php#faq.installation.apache
2

PHP is glue. It is the glue used to build cool web applications by
sticking dozens of 3rd-party libraries together and making it all
appear as one coherent entity through an intuitive and easy to learn
language interface. The flexibility and power of PHP relies on the
stability and robustness of the underlying platform. It needs a
working OS, a working web server and working 3rd-party libraries to
glue together. When any of these stop working PHP needs ways to
identify the problems and fix them quickly. When you make the
underlying framework more complex by not having completely separate
execution threads, completely separate memory segments and a strong
sandbox for each request to play in, feet of clay are introduced into
PHP's system....
------------------------

But I just wonder, isn't all mod_php/mod_python/mod_perl/mod_ruby are
relying on the same set of popular 3rd party libraries? e.g. zlib,
libxml, expat, iconv....so the above statement is also true in
mod_python/mod_perl/mod_ruby?

So it turn out that Threaded MPM is only suitable for serving static
pages?

Thanks.

---------------------------------------------------------------------
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


---------------------------------------------------------------------
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


Mime
View raw message