Re: Apache::Session::File hangs

2003-01-19 Thread Perrin Harkins 
Axel Huizinga wrote:

The following code hangs after reloading and the try to tie again the 
previously created session! WHY?
...

use vars qw(
   $id $sID
   $lockDir
   %session $sessionDir
   );


The session variable has to go out of scope for the lock to be released. 
 I know it seems like the untie should do it, but try making %session a 
lexical instead of a global.

- Perrin

Re: Apache::Session::File and free memory weirdness

2001-08-30 Thread Perrin Harkins 

 Odd thing #1:  As it gets into evening time, load on the machine drops off
 and there are fewer httpd children running, but I am not seeing free
 memory return to that 1.3GB level.  At most it comes back up to 400MB or
 so.  I don't think the httpd children are hanging on to memory, because
 they cycle through pretty quickly - MaxRequestsPerChild is set to 512 and
 none of the processes are ever more than a couple minutes old when I look
 in.  Is there any reason to think the parent httpd process would hang on
 to anything?

I have noticed that over time the new processes will spawn with less memory
shared.  I'm not sure exactly why this is, but it does seem to happen.  A
nightly complete restart of the server will reset things, but you may not
have that option.

 Odd thing #2:  (This part seems most bizarre to me.)  At 5:15 AM, we run a
 Perl script that finds and deletes Apache::Session::File session and lock
 files that are older than 28 days.  Usually there are about 50,000 old
 files that get deleted out of about 2,300,000 total.  Almost immediately,
 free memory on the machine jumps back up to 1.3GB.  What's up with that?

Sounds like you're counting the buffers and cache in your used memory.
Depending on what OS you're on, you may want to look at a tool other than
top.  The memory used for buffers and cache will be available to
applications if they need it.

- Perrin

Re: Apache::Session::File and free memory weirdness

2001-08-30 Thread Adi Fairbank 

Perrin Harkins wrote:
 
  Odd thing #1:  As it gets into evening time, load on the machine drops off
  and there are fewer httpd children running, but I am not seeing free
  memory return to that 1.3GB level.  At most it comes back up to 400MB or
  so.  I don't think the httpd children are hanging on to memory, because
  they cycle through pretty quickly - MaxRequestsPerChild is set to 512 and
  none of the processes are ever more than a couple minutes old when I look
  in.  Is there any reason to think the parent httpd process would hang on
  to anything?
 
 I have noticed that over time the new processes will spawn with less memory
 shared.  I'm not sure exactly why this is, but it does seem to happen.  A
 nightly complete restart of the server will reset things, but you may not
 have that option.
 

I have noticed this also.  I have a theory about its cause, but I haven't
had the free time to hack with it yet.  My theory is that when the VM
subsystem swaps pages of the mod_perl parent process, those pages become
forever unshared (even after they return to memory from swap).  So I was
going to test the mlockall() Linux system call to see if it made a
difference.  (Search the archives for mlockall).

However, I am using the Linux platform - the VM behavior may be totally
different on Solaris.

If anyone else has some time to play with mlockall() on Linux, I'd like to
know the results.  It'll be a few more weeks till I get a chance.

-Adi

Re: Apache::Session::File

2001-02-06 Thread harilaos 

How do i change this locking mechanish of win32?
Am i using the wrong module? From apache::session::* modules
do you know which are supposed to work on win32?

Thanks

Gunther Birznieks wrote:
 
 You need to change the locking mechanism on Win32 to not use IPC. I believe
 there are examples for using Flock based locking but am not sure.
 
 If you are using win32 mod_perl, locking is irrelevant anyway because all
 requests are serialized through one engine.
 
 At 03:43 PM 2/5/01 +, harilaos wrote:
 Hello,
 I ma trying to use this module to store persident data on file
 on win32 environment.
 I use the code:
 
 use Apache;
 use Apache::Session::File;
 use CGI qw/:standard/;
 use CGI::Carp qw(fatalsToBrowser);
 
 print header();
 print start_html;
 
   my %global_data;
 
   eval {
   tie %global_data, 'Apache::Session::File', 1,
  {Directory = '/temp/sessiondata'};
   };
   if ($@) {
  die "Global data is not accessible: $@";
   }
 
 print "hello";
 
 print end_html;
 
 I get error in apache logs :
 Can't locate IPC/SysV.pm in @INC
 
 do I need the IPC/SysV.pm module?
 I have searched the documentation but i don't see a simple clear example
 to do this.
 
 Can you help please?
 
 Thanks
 
 __
 Gunther Birznieks ([EMAIL PROTECTED])
 eXtropia - The Web Technology Company
 http://www.extropia.com/

Re: Apache::Session::File

2001-02-05 Thread Gunther Birznieks 

You need to change the locking mechanism on Win32 to not use IPC. I believe 
there are examples for using Flock based locking but am not sure.

If you are using win32 mod_perl, locking is irrelevant anyway because all 
requests are serialized through one engine.

At 03:43 PM 2/5/01 +, harilaos wrote:
Hello,
I ma trying to use this module to store persident data on file
on win32 environment.
I use the code:

use Apache;
use Apache::Session::File;
use CGI qw/:standard/;
use CGI::Carp qw(fatalsToBrowser);

print header();
print start_html;

  my %global_data;

  eval {
  tie %global_data, 'Apache::Session::File', 1,
 {Directory = '/temp/sessiondata'};
  };
  if ($@) {
 die "Global data is not accessible: $@";
  }

print "hello";

print end_html;

I get error in apache logs :
Can't locate IPC/SysV.pm in @INC

do I need the IPC/SysV.pm module?
I have searched the documentation but i don't see a simple clear example
to do this.

Can you help please?

Thanks

__
Gunther Birznieks ([EMAIL PROTECTED])
eXtropia - The Web Technology Company
http://www.extropia.com/

RE: Apache::Session::File

2000-06-02 Thread Jerrad Pierce 

My bad, it does seem to be using flock, but it still seems to be
the consistent point of failure.. and I am untieing immediately after use


  o _
 /|/ |   Jerrad Pierce \ | __|_ _|
 /||/   http://pthbb.org  .  | _|   |
 \||  _.-~-._.-~-._.-~-._@"  _|\_|___|___|


 -Original Message-
 From: Jerrad Pierce [mailto:[EMAIL PROTECTED]]
 Sent: Friday, June 02, 2000 12:43
 To: '[EMAIL PROTECTED]'
 Subject: Apache::Session::File
 
 
 Anybody know why Apcahe::Session::Lock::File.pm uses lock 
 FILES instead of
 flocking the file? It seems to be causing problems with 
 rapdifre access...
 
   o _
  /|/ |   Jerrad Pierce \ | __|_ _|
  /||/   http://pthbb.org  .  | _|   |
  \||  _.-~-._.-~-._.-~-._@"  _|\_|___|___|