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Heap fragmentation on HPUX

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Operating Systems HP-UX Heap fragmentation on HPUX
# 1  
Old 06-30-2010
Heap fragmentation on HPUX
Hi All,

We are facing issues on HPUX with the C heap region growing. We use a product for CRM by name ClarifyCRM and it uses a native layer for DB access. so there are best practices in place to actual control memory. recently we have seen issues that the C heap region is growing faster than expected and we have to bounce the weblogic server every day on the product ion system which are mission critical servers.

ClarifyCRM has provided a text utility to check the Diagnostic information of the serves how it is handling the DB related Objects both on the Java Heap and also on Native layer,but they look fine and ClarifyCRM also confirmed the same thing. The only option we left out was to see which part of the code in the native layer is causing the problem, so we decided to let the server crash and analyse the core for C Heap growth and related fragmentation.

Can someone tell me how to analyse Core and check the MemMap on the Process and Data Region on OS.

Regards
Ram
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LEARN ABOUT DEBIAN

heap::elem::refrev

Heap::Elem::RefRev(3pm) 				User Contributed Perl Documentation				   Heap::Elem::RefRev(3pm)

NAME

       Heap::Elem::RefRev - Reversed Object Reverence Heap Elements

SYNOPSIS

	 use Heap::Elem::RefRev( RefRElem );
	 use Heap::Fibonacci;

	 my $heap = Heap::Fibonacci->new;
	 my $elem;

	 foreach $i ( 1..100 ) {
	     $obj = myObject->new( $i );
	     $elem = RefRElem( $obj );
	     $heap->add( $elem );
	 }

	 while( defined( $elem = $heap->extract_top ) ) {
	     # assume that myObject object have a method I<printable>
	     print "Largest is ", $elem->val->printable, "
";
	 }

DESCRIPTION

       Heap::Elem::RefRev is used to wrap object reference values into an element that can be managed on a heap.  Each referenced object must have
       a method cmp which can compare itself with any of the other objects that have references on the same heap.  These comparisons must be con-
       sistant with normal arithmetic.	The top of the heap will have the largest (according to cmp) element still remaining.  (See
       Heap::Elem::Ref if you want the heap to always return the smallest element.)

       The details of the Elem interface are described in Heap::Elem.

       The details of using a Heap interface are described in Heap.

AUTHOR

       John Macdonald, john@perlwolf.com

COPYRIGHT

       Copyright 1998-2007, O'Reilly & Associates.

       This code is distributed under the same copyright terms as perl itself.

SEE ALSO

       Heap(3), Heap::Elem(3), Heap::Elem::Ref(3).

perl v5.8.8							    2007-10-23						   Heap::Elem::RefRev(3pm)