On 3/22/07, oryann9 <[EMAIL PROTECTED]> wrote:
> This really isn't a Perl question, though. If you > have questions about > dynamic vs. static linking, and why you might want > to do one or the > other, you should probably pick up a good book on C > and/or the C > compiler on your system. > > HTH, > > -- jay thank you for responding, however I have to disagree with you in that this is not a Perl question because it is, otherwise perldoc -q would not have this info. In addition it directly talks about options when installing Perl.
I think you're having trouble keeping your Perls straight. There are several things that go by the name /[Pp]erl/, and this list is about Perl, the programming language. It is not a place for a discussion of compiling C code or linking C libraries, even if the C projects are named "perl" or libperl. Why? Because 1) the questions are about compiling and executing C code, not about writing and executing Perl code; 2) the questions are about tuning a specific (C-langauge) program in a particular environment, not about general Perl language competency; and, 3) the questions are by any measure well beyond the scope of a beginners list. For a general questions about the pros and cons of dynamic vs. static linking, I would look at a good C language text book, For questions about compiling, linking, and debugging the Perl executable, I would look at comp.lang.perl.misc. For questions about tuning and maintaining a mod_perl installation, I would look at the mod_perl mailing list archives.
So in general in a web environment with 8-12gb RAM, mod_Perl and a MySQL/Postgres backend, do you or people you know statically link libc.a?
Do you statically link libc.a to your other applications? How much of that 8GB (or is it 12GB) of RAM is active at any given point? What else is the machine doing? Those are just a few of the questions that spring to mind. Again, this question isn't about Perl, it's a system administration question about server tuning. There is no answer other than what's right for your system, and probably no way to find that out other than trail and error. Only you know your system's average and peak load and memory consumption, etc. As the perlfaq makes clear, compiling a against a statically-linked libc will improve the performance of an individual perl interpreter, assuming that it's the only thing running on the system and there are sufficient resources available to accommodate the the increased resident memory. It is rare, though, that a single perl interpreter will be the only process running on a machine (in fact, it's impossible except in embedded applications). And neither the perlfaq nor anyone on this list can know whether your particular environment can support the configuration you propose. Only you know whether making changes to your Perl configuration will enhance or degrade your overall system performance. Again, though, this question isn't beginner anything, let alone beginner Perl. That you think it's a Perl question is an indication that you're probably heading down the wrong road. HTH, --jay -------------------------------------------------- This email and attachment(s): [ ] blogable; [ x ] ask first; [ ] private and confidential daggerquill [at] gmail [dot] com http://www.tuaw.com http://www.downloadsquad.com http://www.engatiki.org values of β will give rise to dom!
