Apache-ASP
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Note that the Session Manager is very robust on its own, and denial
of service attacks of the types that spiders and other web bots
normally execute are not likely to affect the Session Manager significantly.
=item How can I use $Session to store a $dbh database handle ?
You cannot use $Session to store a $dbh handle. This can
be awkward for those coming from the IIS/NT world, where
you could store just about anything in $Session, but this
boils down to a difference between threads vs. processes.
Database handles often have per process file handles open,
which cannot be shared between requests, so though you
have stored the $dbh data in $Session, all the other
initializations are not relevant in another httpd process.
All is not lost! Apache::DBI can be used to cache
database connections on a per process basis, and will
work for most cases.
Set your MaxClients low, such that if you have that
many httpd servers running, which will happen on busy site,
your system will not start swapping to disk because of
excessive RAM usage. Typical settings are less than 100
even with 1 gig RAM! To handle more client connections,
look into a dual server, mod_proxy front end.
=head2 High MaxRequestsPerChild
Set your max requests per child thread or process (in httpd.conf) high,
so that ASP scripts have a better chance being cached, which happens after
they are first compiled. You will also avoid the process fork penalty on
UNIX systems. Somewhere between 50 - 500 is probably pretty good.
You do not want to set this too high though or you will risk having
your web processes use too much RAM. One may use Apache::SizeLimit
or Apache::GTopLimit to optimally tune MaxRequestsPerChild at runtime.
=head2 Precompile Modules
For those modules that your Apache::ASP application uses,
- Fixed bug where XMLSubs where removing <?xml version ... ?> tag
when it was needed in XSLT mode.
+ $Server->Mail({ CC => '...', BCC => '...' }), now works to send
CC & BCC headers/recipients.
+ Removed $Apache::ASP::Register definition which defined the current
executing Apache::ASP object. Only one part of the application was
using it, and this has been fixed. This would have been an unsafe
use of globals for a threaded environment.
+ Decreased latency when doing Application_OnStart, used to sleep(1)
for CleanupMaster sync, but this is not necessary for Application_OnStart
scenario
+ Restructure code / core templates for MailErrorsTo funcationality.
Wrote test mail_error.t to cover this. $ENV{REMOTE_USER} will now
be displayed in the MailErrorsTo message when defined from 401 basic auth.
+ $Server->RegisterCleanup should be thread safe now, as it no longer relies
on access to @Apache::ASP::Cleanup for storing the CODE ref stack.
+ test t/inode_names.t for InodeNames and other file tests covering case
of long file names.
- Fixed long file name sub identifier bug. Added test t/long_names.t.
+ CacheDir may now be set independently of StateDir. It used to default
to StateDir if it was set.
way to configure Apache::ASP at runtime.
Note that the Session Manager is very robust on its own, and denial of
service attacks of the types that spiders and other web bots normally
execute are not likely to affect the Session Manager significantly.
How can I use $Session to store a $dbh database handle ?
You cannot use $Session to store a $dbh handle. This can be awkward for
those coming from the IIS/NT world, where you could store just about
anything in $Session, but this boils down to a difference between
threads vs. processes.
Database handles often have per process file handles open, which cannot
be shared between requests, so though you have stored the $dbh data in
$Session, all the other initializations are not relevant in another
httpd process.
All is not lost! Apache::DBI can be used to cache database connections
on a per process basis, and will work for most cases.
Development
$Application->Lock() in your global.asa's Script_OnStart.
Low MaxClients
Set your MaxClients low, such that if you have that many httpd servers
running, which will happen on busy site, your system will not start swapping
to disk because of excessive RAM usage. Typical settings are less than 100
even with 1 gig RAM! To handle more client connections, look into a dual
server, mod_proxy front end.
High MaxRequestsPerChild
Set your max requests per child thread or process (in httpd.conf) high, so
that ASP scripts have a better chance being cached, which happens after they
are first compiled. You will also avoid the process fork penalty on UNIX
systems. Somewhere between 50 - 500 is probably pretty good. You do not want
to set this too high though or you will risk having your web processes use
too much RAM. One may use Apache::SizeLimit or Apache::GTopLimit to
optimally tune MaxRequestsPerChild at runtime.
Precompile Modules
For those modules that your Apache::ASP application uses, make sure that
they are loaded in your sites startup.pl file, or loaded with PerlModule in
- Fixed bug where XMLSubs where removing <?xml version ... ?> tag
when it was needed in XSLT mode.
+ $Server->Mail({ CC => '...', BCC => '...' }), now works to send
CC & BCC headers/recipients.
+ Removed $Apache::ASP::Register definition which defined the current
executing Apache::ASP object. Only one part of the application was
using it, and this has been fixed. This would have been an unsafe
use of globals for a threaded environment.
+ Decreased latency when doing Application_OnStart, used to sleep(1)
for CleanupMaster sync, but this is not necessary for Application_OnStart
scenario
+ Restructure code / core templates for MailErrorsTo funcationality.
Wrote test mail_error.t to cover this. $ENV{REMOTE_USER} will now
be displayed in the MailErrorsTo message when defined from 401 basic auth.
+ $Server->RegisterCleanup should be thread safe now, as it no longer relies
on access to @Apache::ASP::Cleanup for storing the CODE ref stack.
+ test t/inode_names.t for InodeNames and other file tests covering case
of long file names.
- Fixed long file name sub identifier bug. Added test t/long_names.t.
+ CacheDir may now be set independently of StateDir. It used to default
to StateDir if it was set.
lib/Apache/ASP/Server.pm view on Meta::CPAN
}
sub CreateObject {
my($self, $name) = @_;
my $asp = $self->{asp};
# dynamically load OLE at request time, especially since
# at server startup, this seems to fail with "start_mutex" error
#
# no reason to preload this unix style when module loads
# because in win32, threaded model does not need this prefork
# parent httpd compilation
#
unless(defined $OLESupport) {
eval 'use Win32::OLE';
if($@) {
$OLESupport = 0;
} else {
$OLESupport = 1;
}
}
site/changes.html view on Meta::CPAN
- Fixed bug where XMLSubs where removing <?xml version ... ?> tag
when it was needed in XSLT mode.
+ $Server->Mail({ CC => '...', BCC => '...' }), now works to send
CC & BCC headers/recipients.
+ Removed $Apache::ASP::Register definition which defined the current
executing Apache::ASP object. Only one part of the application was
using it, and this has been fixed. This would have been an unsafe
use of globals for a threaded environment.
+ Decreased latency when doing Application_OnStart, used to sleep(1)
for CleanupMaster sync, but this is not necessary for Application_OnStart
scenario
+ Restructure code / core templates for MailErrorsTo funcationality.
Wrote test mail_error.t to cover this. $ENV{REMOTE_USER} will now
be displayed in the MailErrorsTo message when defined from 401 basic auth.
+ $Server->RegisterCleanup should be thread safe now, as it no longer relies
on access to @Apache::ASP::Cleanup for storing the CODE ref stack.
+ test t/inode_names.t for InodeNames and other file tests covering case
of long file names.
- Fixed long file name sub identifier bug. Added test t/long_names.t.
+ CacheDir may now be set independently of StateDir. It used to default
to StateDir if it was set.
site/faq.html view on Meta::CPAN
of service attacks of the types that spiders and other web bots
normally execute are not likely to affect the Session Manager significantly.</font>
<p>
<a name=How%20can%20I%20us50054dc6></a>
<font face=verdana><font class=title size=-1 color=#555555><b>How can I use $Session to store a $dbh database handle ?</b></font>
<font face="courier new" size=3><pre>
</pre></font>You cannot use $Session to store a $dbh handle. This can
be awkward for those coming from the IIS/NT world, where
you could store just about anything in $Session, but this
boils down to a difference between threads vs. processes.
<font face="courier new" size=3><pre>
</pre></font>Database handles often have per process file handles open,
which cannot be shared between requests, so though you
have stored the $dbh data in $Session, all the other
initializations are not relevant in another httpd process.
<font face="courier new" size=3><pre>
</pre></font>All is not lost! Apache::DBI can be used to cache
database connections on a per process basis, and will
work for most cases.</font>
site/tuning.html view on Meta::CPAN
many httpd servers running, which will happen on busy site,
your system will not start swapping to disk because of
excessive RAM usage. Typical settings are less than 100
even with 1 gig RAM! To handle more client connections,
look into a dual server, mod_proxy front end.</font>
<p>
<a name=High%20MaxRequ0724a06d></a>
<font face=verdana><font class=title size=+0 color=#555555><b>High MaxRequestsPerChild</b></font>
<font face="courier new" size=3><pre>
</pre></font>Set your max requests per child thread or process (in httpd.conf) high,
so that ASP scripts have a better chance being cached, which happens after
they are first compiled. You will also avoid the process fork penalty on
UNIX systems. Somewhere between 50 - 500 is probably pretty good.
You do not want to set this too high though or you will risk having
your web processes use too much RAM. One may use Apache::SizeLimit
or Apache::GTopLimit to optimally tune MaxRequestsPerChild at runtime.</font>
<p>
<a name=Precompile%20M39676a96></a>
<font face=verdana><font class=title size=+0 color=#555555><b>Precompile Modules</b></font>
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