Hello, I am using ap2 + mp2 with the worker mpm and ithreads to serve about 12 million dynamically generated pages per day. This includes RPC calls via HTTP and database queries. I am currently experimenting with creating pools of threads inside the perl interpreter for handling communicating with multiple remote machines simultaniously.
My project would not be possible using prefork without a huge increase in hardware expense (the reason we tried using worker mpm). Performance is good on decent hardware, sub second page generation times. I have noticed that for my app, prefork was a smidgen faster. That said the following should be said as well: Make sure (atleast on Linux) that you have set your number of available threads high enough that requests do not have to wait for a new thread to be created. Your performance will suck otherwise as new thread creation is slower than one would expect. This is true for apache2 without mod_perl as well btw but not quite as bad.. Apache2 still has bugs, so does mp2, be careful. I have identified at at least one run away memory leak that I can't track down and apache2 segfaults on occasion. Isolating such things in busy threaded apps is *very* difficult. ithreads in perl are very slow to start and the implementation is a bit buggy with spotty documentation. Eg, you *can NOT* return a list from a thread, you may return exactly one scalar ref to whatever, the docs are *wrong* and the snots on P5P have yet to even admit (atleast to me, I stopped following the issue a while ago, may be fixed now) that this is even a bug or a problem. Best, Richard F. Rebel On Sat, 2004-02-21 at 06:07, Stefan Cars wrote: > Hi! > > I don't have any problems, I'm just interested in what people think of > the performance vs. preforking and if there is any problems using worker > and ithreads ? > > On Fri, 20 Feb 2004, Stas Bekman wrote: > > > Stefan Cars wrote: > > > Hi! > > > > > > Anyone that has any good links or any good input on using the worker MPM > > > and ithreads with mod_perl 2 and Apache 2 > > > > You could be a bit more specific, Stafan. What kind of problems do you have? > > You also have to tell us more about your environment, which is done the best > > by calling mp2bug or t/REPORT > > http://perl.apache.org/docs/2.0/user/help/help.html#Important_Information > > > > __________________________________________________________________ > > Stas Bekman JAm_pH ------> Just Another mod_perl Hacker > > http://stason.org/ mod_perl Guide ---> http://perl.apache.org > > mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com > > http://modperlbook.org http://apache.org http://ticketmaster.com > > > > -- > Stefan Cars > Snowfall Communications > Tel: +46 (0)18 430 80 50 - Direct: +46 (0)18 430 80 51 > Mobile: +46 (0)708 44 36 00 - Fax: +46 (0)708 44 36 04 > > > > ______________________________________________________________________ > SNOWFALL DISCLAIMER: > The information contained in this email and in any > attachments is confidential and may be privileged. If you are not the > intended recipient, please destroy this message and notify the sender > immediately. You should not retain, copy or use this email for any > purpose, nor disclose all or any part of its content to any other person. > Any views expressed in this message are those of the individual sender, > except where the sender specifically states them to be the views of > Snowfall Communications. > > Snowfall Communications monitors the content of emails sent and received > via its network for unauthorised use and for other lawful business > purposes. The contents of an attachment to this email may contain viruses > which could damage your computer system. While Snowfall Communications has > taken every reasonable precaution to minimise this risk, we cannot accept > liability for any damage which you sustain as a result of software > viruses. You should carry out your own virus checks before opening the > attachment. -- Richard F. Rebel [EMAIL PROTECTED] t. 212.239.0000
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