RE: Strange mod_perl error. Help needed!
Ok! Thanx! I found the bug :-)
Try to install the AUTOLOAD sub and trace the calls:
use Carp;
sub AUTOLOAD{
Carp::cluck("trying to load $AUTOLOAD");
}
at least you will figure out where the sub is called from. It looks
_
Stas Bekman JAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide http://perl.apache.org/guide
mailto:[EMAIL PROTECTED] http://apachetoday.com http://logilune.com/
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RE: Advice needed. (web app. performance)
What about this idea: open N 'ispell -a' processes for writing and reading at httpd start up, save their descriptors into an array in some Perl module and then mark decriptors in the table then as "busy" or "idle". But the question is how to share this dynamicly modified table among all httpd processes? .. / vlad
Advice needed. (web app. performance)
Hi, I've just finished a simple web based spellcheck application based on ispell, it's written as perl module which just call ispell on every request (actually keeps it open afert first request). The bad thing is N users used spellcheck there are N running useless ispells and it is not good I think. I think as sort of spellcheck server should be written which can fork accordingly to user requests. Where can I find sample code (skeleton code) for such server? Would you recommend any other method? Thanx, \Vlad.
RE: Advice needed. (web app. performance)
I swear, I searched CPAN before posting the question to the conference and I used Lingua::Ispell in my application. But Lingua::Ispell just opens 'ispell -a' on reading and writing for every new httpd process, so it take time to open dictionaries or switch to other language dictionary. It provide nice interface .. but I thought that stand-alone "spell" server would provide better performance and used less memory. \ vlad.
[OT] Mixing C and HTML code just like in ePerl?
Hi, I use ePerl and it's good, but some things need better performance. Is there any "chtml" compiler that allow me freely mix C and html code just like in ePerl: HTML code % C code .. % HTML code %=(C expr.)% .. Vlad. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[OT] advice needed.
Hi, I know it's very OT, but don't kick me I just need advice. I am going to work in a Web Company to write some mod_perl apps. They gave me a contract (I think the terrible one) which contains paragraph (among the others) that signs the rights to all inventions over to them. The problem is .. I have never sign such contracts and I don't know if it's "common" contract template that programmers sign when start coding for somebody. If someone have 15 minutes to have a look at the my contract (I'll send link) or tell where I can find a "typical" contract for such work, let me know. /Vlad.
RE: [OT] advice needed.
this is the contract (one paragraph is already excluded) : http://vlad.narod.ru/contract.html is it really looks like a usual thing? (the matter of the job is just making mod_perl apps.) /Vlad. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, September 29, 2000 4:32 PM Cc: [EMAIL PROTECTED] Subject: Re: [OT] advice needed. Vladislav Safronov wrote: I am going to work in a Web Company to write some mod_perl apps. They gave me a contract (I think the terrible one) which contains paragraph (among the others) that signs the rights to all inventions over to them. The same paragraph (the inventions resulted from your contracting work belong to the company who hired you) is in my contract here in Germany and my lawyer told me it's a usual thing. The problem is .. I have never sign such contracts and I don't know if it's "common" contract template that programmers sign when start coding for somebody. I'd go to a lawyer to check the contract.
How to close connect and continue processing?
Hi, After user request my script should say that the request is accepted and continue processing user data (it takes a time) so I want to tell the browser that all data is sent. I searched mod_perl guide but I didn't find such code snippet. Could you send me such example? == Vlad.
RE: How to close connect and continue processing?
I read the guide and I think the best is just add "" :)
(how could I forget it!)
..
system("myprog la la ");
print "/html";
# end
On Thu, 14 Sep 2000, Matt Sergeant wrote:
On Thu, 14 Sep 2000, Matt Sergeant wrote:
On Thu, 14 Sep 2000, Vladislav Safronov wrote:
Hi,
After user request my script should say that the
request is accepted and
continue processing user data (it takes a time) so I
want to tell the
browser
that all data is sent. I searched mod_perl guide but I
didn't find such code
snippet.
Could you send me such example?
$r-register_cleanup(\do_big_work);
I should have mentioned that this is far from a perfect
solution (cue
Stas) as it ties up a mod_perl process. See the guide for alternate
solutions.
Like Matt has said, this used mostly for light things like logging or
process killing (Apache::{SizeLimit|GTopLimit}). See the performance
chapter for forking techniques for heavy jobs:
http://perl.apache.org/guide/performance.html#Forking_and_Exec
uting_Subprocess
--
Matt/
Fastnet Software Ltd. High Performance Web Specialists
Providing mod_perl, XML, Sybase and Oracle solutions
Email for training and consultancy availability.
http://sergeant.org | AxKit: http://axkit.org
_
Stas Bekman JAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide http://perl.apache.org/guide
mailto:[EMAIL PROTECTED] http://apachetoday.com http://jazzvalley.com
http://singlesheaven.com http://perlmonth.com perl.org apache.org
RE: How to close connect and continue processing?
On Thu, 14 Sep 2000, Vladislav Safronov wrote:
I read the guide and I think the best is just add "" :)
(how could I forget it!)
..
system("myprog la la ");
print "/html";
# end
True, but what happens if your program tries to print
something. You've
all in/out/err streams inherited, where in/out are tied to a
socket. You
must close them at the beginning of the external script.
hm.. it's true. I should back to the guide ...
Thanx for the help!
Vlad.
Anyway, it might be neater to use , but performance wise is
not, since
you spawn a shell. Of course for the heavily loaded systems. Fork is
faster.
On Thu, 14 Sep 2000, Matt Sergeant wrote:
On Thu, 14 Sep 2000, Matt Sergeant wrote:
On Thu, 14 Sep 2000, Vladislav Safronov wrote:
Hi,
After user request my script should say that the
request is accepted and
continue processing user data (it takes a time) so I
want to tell the
browser
that all data is sent. I searched mod_perl guide but I
didn't find such code
snippet.
Could you send me such example?
$r-register_cleanup(\do_big_work);
I should have mentioned that this is far from a perfect
solution (cue
Stas) as it ties up a mod_perl process. See the guide
for alternate
solutions.
Like Matt has said, this used mostly for light things
like logging or
process killing (Apache::{SizeLimit|GTopLimit}). See the
performance
chapter for forking techniques for heavy jobs:
http://perl.apache.org/guide/performance.html#Forking_and_Exec
uting_Subprocess
--
Matt/
Fastnet Software Ltd. High Performance Web Specialists
Providing mod_perl, XML, Sybase and Oracle solutions
Email for training and consultancy availability.
http://sergeant.org | AxKit: http://axkit.org
_
Stas Bekman JAm_pH -- Just Another
mod_perl Hacker
http://stason.org/ mod_perl Guide
http://perl.apache.org/guide
mailto:[EMAIL PROTECTED] http://apachetoday.com http://jazzvalley.com
http://singlesheaven.com http://perlmonth.com perl.org apache.org
_
Stas Bekman JAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide http://perl.apache.org/guide
mailto:[EMAIL PROTECTED] http://apachetoday.com http://jazzvalley.com
http://singlesheaven.com http://perlmonth.com perl.org apache.org
RE: Question about $sth-finish;
On Tue, Aug 15, 2000 at 03:26:03PM +0400, Vladislav Safronov wrote:
Hi,
Could you have a look at the lines and answer the question ..
---
sub foo {
my $dbh = shift;
my $sql = ...
my $sth = $dbh-prepare($sql);
$sth-execute;
$sth-finish;
}
===
Do I always need to call $sth-finish?
You *never* need to call finish on non-select statements.
(If you do, it's a driver bug.)
Wouldn't it be automaticly called when
sub foo ends (when my variable $sth get destroyed)?
Finish marks the end of *fetching*, not the end of life of the handle.
So I can freely overwrite the handle with new one, since it's not the end
of life of the handle, can't I?
==
my $sql = "select .."
my $sth = $dbh-prepare($sql);
$sth-execute;
.. fetch just some (not all) data
my $newsql = "select .."
$sth = $dbh-prepare($newsql);
$sth-execute;
==
and this code should work with troubles ...
Vlad.
RE: Apache::ePerl
Hi! ;) see the benchmarks http://www.chamas.com/bench/index.html /Vlad Can anyone say some words about perfomance issues of Embedded Perl - ePerl (don't mix up with HTML::Embperl). I mean running under mod_perl using Apache::ePerl. Maybe anyone has done some perfomance testing? Thanx beforehand. Sincerely yours, Vladimir Buyanov, senior web-developer Agama Internet Systems http://www.aport.ru http://www.atrus.ru http://www.agama.com
RE: Question about $sth-finish;
Well, summarizing all the answers and assuming using Mysql 1. $sth-finish should be used if (and ONLY if) the the returned data (any SELECT, but not INSERT, UPDATE?) has not been fetched ALL and $sth is going to be overwritten.. 2. $sth (defined as 'my') should not call finish before it gets out of scope.. Vlad/
Question about $sth-finish;
Hi,
Could you have a look at the lines and answer the question ..
---
sub foo {
my $dbh = shift;
my $sql = ...
my $sth = $dbh-prepare($sql);
$sth-execute;
$sth-finish;
}
===
Do I always need to call $sth-finish? Wouldn't it be automaticly called
when
sub foo ends (when my variable $sth get destroyed)?
Vlad.
RE: Question about $sth-finish;
On Tue, 15 Aug 2000, Vladislav Safronov wrote:
Hi,
Could you have a look at the lines and answer the question ..
---
sub foo {
my $dbh = shift;
my $sql = ...
my $sth = $dbh-prepare($sql);
$sth-execute;
$sth-finish;
}
===
Do I always need to call $sth-finish? Wouldn't it be
automaticly called
when
sub foo ends (when my variable $sth get destroyed)?
$sth doesn't always get destroyed when foo ends (due to a bug in all
perls). But otherwise, yes.
"my" (perl's my) variables doesn't always get destoyed, does it Perl's
documentation say that "my" vars are the most safe since they get destroyed
when they get out of scope ...
Vlad.
RE: Question about $sth-finish;
Ok. I think, the answers clear the problem, but I have yet more question.
What can you say about this code? is it ok (overwriting previous handle)?
==
sub foo {
my $dbh = shift;
my $sql1 = "select *...
my $sql2 = "select *...
my $sth = $dbh-prepare($sql1);
$sth-execute;
.. fetch some data.
# should be $sth-finish inserted??
$sth = $dbh-prepare($sql2); # we overwrite previous handle saved in $sth
..
$sth-execute;
.. fetch some data.
return;
}
==
Vlad.
RE: parsing SSI in cgi scripts?
Hi, Is there way for processing SSI commands in perl? (my templates may contains SSI commands, so what should I do - just type in real html or process them somehow?) Check out Apache::SSI. It can solve the problem. Can be used with Apache::Filter or by instantiating an Apache::SSI object directly. Ok! Thanks!
parsing SSI in cgi scripts?
Hi, Is there way for processing SSI commands in perl? (my templates may contains SSI commands, so what should I do - just type in real html or process them somehow?) /Vlad
does __END__ at the end save memory?
Hi, Does __END__ directive at the end of every mod_perl script reduce memory used by httpd ? Best regards, /Vlad
RE: Highly optimized mod_perl ?
Ok ! -Original Message- From: Stas Bekman [mailto:[EMAIL PROTECTED]] Sent: Friday, June 23, 2000 2:02 PM To: Vladislav Safronov Cc: '[EMAIL PROTECTED]'; '[EMAIL PROTECTED]' Subject: RE: Highly optimized mod_perl ? Hi, ( ili privet ) I was looking any tips and tricks to optimize my perl script since, our sysadm tells that it's mod_perl slow down the web server response time and it should be rewritten in C. This script does use any database connection, so I think threre is no real way to speed it up. Posting message here was the last chance. Vlad. pishite po-russki. Vlad, this is an international list, so please refrain from using other languages than English. It's impolite to speak in the languages that your audience doesn't know, even if some of the people do. Especially if you are seeking help. For performance notes see: http://perl.apache.org/guide/performance.html -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED] Sent: Saturday, June 17, 2000 9:24 PM To: Vladislav Safronov Cc: [EMAIL PROTECTED] Subject: RE: Highly optimized mod_perl ? Hi, There was a discussion on this list about 1.5 weeks ago on how to optimize mod_perl execution when using the database. Stas Bekman basically has done some tests to show that the driver needs to be initialized in startup.pl file. There were also a discussion about the fact that as far as using templates for HTML generation the fastest approach is when a template is compiled into perl code before being executed. I do not have enough understanding of the internals to explain why though. Another discussion suggested that it is much better to precompile explicitly the functions that you need to use in modules like CGI.pm instead. The fact that you precompile specific functions and not the whole module will save memory space of apache processes that run mod_perl. Saved memory means less swaping, and more memory for cache -- that means speed. There was also a post referring to a comparasing between many scripting and compiled languages that pointed out that by far the most important factor when choosing a language to implement a taks is what algorithm is being used (ie. how smart and fast it is) and that differences in programming languages are not significant compared to that. I also just recently read in "Advanced Perl Programming" by Sriram Srinivasan that (on page 369) there are Static Typing Hints: they give hints to the interepreter for better optimization and type checking. so my Dog $spot = new Dog; should be faster then my $spot= new Dog; It actually should be faster for the consequent method calls to $spot-xyz (because perl would not have to do type checking and run-time) (this me parapharsing the example from the book Static hints will also allow for more aggressive compiler optimizations (using perlcc) (but I do thing this mod_perl relevant). This is my high level overview of what I have learned sofar from the list (I am new to Perl so I am just trying to absorb as much as possible). Regards, Vladislav P. On 17-Jun-2000 Vladislav Safronov wrote: Hi! Does anyone know the way to highly optimize mod_perl for speed? Any hacks, advices? All standard advices read from help are done... Best regards, Vlad Safronov, mailto: [EMAIL PROTECTED] _ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://perl.org http://stason.org/TULARC http://singlesheaven.com http://perlmonth.com http://sourcegarden.org
RE: search engine for the Guide
Hi,
Try http://www.comptek.ru/yandex/YandexFree.html
search engine for web servers with highlighting searched words...
-Original Message-
From: Stas Bekman [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 04, 2000 2:10 PM
To: Matt Sergeant
Cc: mod_perl list
Subject: Re: search engine for the Guide
On Thu, 4 May 2000, Stas Bekman wrote:
On Wed, 3 May 2000, Matt Sergeant wrote:
On Wed, 3 May 2000, Stas Bekman wrote:
Yeah, I've been thinking about it. There was one site
that has offered me
to provide a good search engine and they did, but the
problem is that they
didn't keep up with new releases, so people were
searching the outdated
version, which is quite bad -- I've removed the
reference to it, after
asking them to update their copy for a few months,
with no results.
Can't we use WWW::Search - If I recall correctly some
of the sites can be
restricted to a domain, so you could build a search
interface pretty
easily.
DESCRIPTION :
This class is the parent for all access methods supported by the
WWW::Search library. This library implements a Perl API
to web-based
search engines.
It's not the search engine -- it's a Perl API to the
search engines. We
need a search engine not the API to it. Did I miss something?
Yes. On some of the search engines (AltaVista springs to
mind) you can
search for things on particular web sites, or even links to
particular web
sites. So as long as AltaVista keeps its search contents up
to date, you
can leverage their engine. IIRC either Randall or Lincoln did a
WebTechniques article about this a few months ago.
Oh, I see.
But I want to stress these 2 points:
1) Currently each chapter in the Guide is a huge document, so
doing search
and having a hit, doesn't really help as you still have to go thru the
page to find the exact section that you want to read. So I
think we want a
search engine that's not working with the master version per
se, but with
a copy which has name anchors for each line and:
a. can bring you to exact line with match
b. have the keyword highlighted
2) Most of the search engines have problems with keywords including
non-alpha chars, like if you search for Apache::Registry you
will end up
searching for Apache and Registry since :: is ignored. Now think about
'$r-print' 'BEGIN {', '$@', etc. All these are must for the
doc with many
non-alpha characters which should be searched for.
What do you think?
__
Stas Bekman | JAm_pH--Just Another mod_perl Hacker
http://stason.org/ | mod_perl Guide
http://perl.apache.org/guide
mailto:[EMAIL PROTECTED] | http://perl.orghttp://stason.org/TULARC/
http://singlesheaven.com| http://perlmonth.com http://sourcegarden.org
--
Highly optimized mod_perl ?
Hi! Does anyone know the way to highly optimize mod_perl for speed? Any hacks, advices? All standard advices read from help are done... Best regards, Vlad Safronov, mailto: [EMAIL PROTECTED]
