Thread: Re: [Quickfix-users] Memory Leak - Please help.

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 422-6466

<html><body><div>We don't know when you are done with the message.&nbsp; You need to call Dispose when you are finished with it.</div>
<div>&nbsp;</div>
<div>--oren</div>
<BLOCKQUOTE style="PADDING-LEFT: 8px; MARGIN-LEFT: 8px; BORDER-LEFT: blue 2px solid" webmail="1">-------- Original Message --------<BR>Subject: [Quickfix-users] Memory Leak - Please help.<BR>From: "Sam Smith" &lt;sa...@if...&gt;<BR>Date: Thu, March 20, 2008 6:37 am<BR>To: &lt;<a href="mailto:qui...@li...urceforge">qui...@li...urceforge</a>.net&gt;<BR><BR>QuickFIX Documentation: <a href="http://www.quickfixengine.org/quickfix/doc/html/index.html" target=_blank>http://www.quickfixengine.org/quickfix/doc/html/index.html</a><BR>QuickFIX Support: <a href="http://www.quickfixengine.org/services.html" target=_blank>http://www.quickfixengine.org/services.html</a><BR><BR>
<HR>
<o:SmartTagType name="City" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><o:SmartTagType name="place" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType>
<STYLE>
 #wmMessage st1\:* {behavior:url(#default#ieooui) }

</STYLE>

<STYLE>
 #wmMessage /* Style Definitions */ p.MsoNormal, #wmMessage li.MsoNormal, #wmMessage div.MsoNormal  {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman";}
 #wmMessage a:link, #wmMessage span.MsoHyperlink  {color:blue; text-decoration:underline;}
 #wmMessage a:visited, #wmMessage span.MsoHyperlinkFollowed  {color:purple; text-decoration:underline;}
 #wmMessage span.EmailStyle17  {mso-style-type:personal-compose; font-family:Arial; color:windowtext;}
 #wmMessage @page Section1  {size:595.3pt 841.9pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;}
 #wmMessage div.Section1  {page:Section1;}

</STYLE>

<DIV class=Section1>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hi,<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I am reasonably new to QuickFix and I have a problem. I have been asked to look at part of a C# application using the .Net QuickFixEngine library.<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">My problem is that the application seems to have substantial memory leak.<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Looking at the application using a .Net memory profiler, it looks like a lot of QuickFix objects are hanging around in memory. It looks like the .Net code is releasing all references to the objects, but some unmanaged code is retaining a reference.<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Am I missing something obvious? Should the developers who wrote it have been calling a .Dispose method or delete or something on these objects? One major source of the leak seems to come from messages that are created by the unmanaged C++ library and passed into our managed code. When our managed code finishes with them they do not seem to get cleaned up.<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Please help.<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>
<div><STRONG><B><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Sam Smith</SPAN></FONT></B></STRONG><o:p></o:p></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Developer / Infrastructure</SPAN></FONT><o:p></o:p></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Intelligent Financial Systems</SPAN></FONT><o:p></o:p></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">110 <st1:place w:st="on">St Martin</st1:place>'s Lane<BR><st1:City w:st="on"><st1:place w:st="on">London</st1:place></st1:City><BR>WC2N 4BA</SPAN></FONT><o:p></o:p></div>
<div><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">&nbsp;<o:p></o:p></SPAN></FONT></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Telephone 020 7379 7328</SPAN></FONT><o:p></o:p></div>
<div><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Fax 020 7379 7329</SPAN></FONT><o:p></o:p></div>
<div><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><o:p>&nbsp;</o:p></SPAN></FONT></div></DIV>
<HR>
-------------------------------------------------------------------------<BR>This <a href="http://SF.net">SF.net</a> email is sponsored by: Microsoft<BR>Defy all challenges. Microsoft(R) Visual Studio 2008.<BR><a href="http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/" target=_blank>http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/</a>
<HR>
_______________________________________________<BR>Quickfix-users mailing list<BR><a onclick="Popup.composeWindow('pcompose.php?sendto=Quickfix-users%40lists.sourceforge.net'); return false;" href="#Compose">Quickfix-users<B></B>@lists.sourceforge.net</A><BR><A href="https://lists.sourceforge.net/lists/listinfo/quickfix-users" target=_blank>https://lists.sourceforge.net/lists/listinfo/quickfix-users</a><BR></BLOCKQUOTE></body></html>