RE: JESS: [EXTERNAL] Question on QueryResult close() function
"Friedman-Hill, Ernest" <[email protected]> Fri, 28 Jun 2013 13:21:50 +0000
| Newsgroups | gmane.comp.java.jess |
|---|---|
| Message-ID | <[email protected]> |
--_000_7F2CAF6713AFDD4392FC4DAA05671E072C7EBD9BEXMB10srnsandia_ Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Hi Daniel, Closing a QueryResult doesn't really do anything important; normal garbage = collection will free all of its resources. I used Google to see if there was a standard Jess/Matlab integration that I= didn't know about, but I didn't find one; I'm afraid I don't know anything= about how Jess and Matlab are typically used together. Jess does "warm up"= for a few iterations if run repeatedly with the same rules - i.e., "(reset= )" won't necessarily get you back to the same memory usage as before the fi= rst run - but this levels off quickly. It would be a good idea to run a hea= p analyzer tool to see what kind of objects are being leaked; that might gi= ve us a clue as to what's happening. From: [email protected] [mailto:[email protected]] On B= ehalf Of Daniel Selva Sent: Thursday, June 27, 2013 12:53 PM To: jess-users Subject: JESS: [EXTERNAL] Question on QueryResult close() function Hi, I am experiencing a memory leak problem in a Matlab-Jess application and I = am trying to locate the leak. I came across the definition of the close() m= ethod of the QueryResult class. I have never called this method after using= queries. 1) Should I call close() after using a query? 2) Could not calling close() be the cause of the leak? If not, I would appreciate any tips on typical causes of leaks in Matlab-Je= ss applications. Thanks in advance, Daniel --_000_7F2CAF6713AFDD4392FC4DAA05671E072C7EBD9BEXMB10srnsandia_ Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1F497D">Hi Daniel,<o:p></o:p></sp= an></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1F497D"><o:p> </o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1F497D">Closing a QueryResult doe= sn’t really do anything important; normal garbage collection will fre= e all of its resources.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1F497D"><o:p> </o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1F497D">I used Google to see if t= here was a standard Jess/Matlab integration that I didn’t know about,= but I didn’t find one; I’m afraid I don’t know anything = about how Jess and Matlab are typically used together. Jess does “warm up&= #8221; for a few iterations if run repeatedly with the same rules – i= .e., “(reset)” won’t necessarily get you back to the same= memory usage as before the first run – but this levels off quickly. It would be a good idea to run a heap analyzer tool to see what kind of ob= jects are being leaked; that might give us a clue as to what’s happen= ing.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1F497D"><o:p> </o:p></span><= /p> <p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:"= ;Tahoma","sans-serif"">From:</span></b><span style=3D"font-s= ize:10.0pt;font-family:"Tahoma","sans-serif""> owner-je= [email protected] [mailto:[email protected]] <b>On Behalf Of </b>Daniel Selva<br> <b>Sent:</b> Thursday, June 27, 2013 12:53 PM<br> <b>To:</b> jess-users<br> <b>Subject:</b> JESS: [EXTERNAL] Question on QueryResult close() function<o= :p></o:p></span></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <div> <p class=3D"MsoNormal">Hi,<o:p></o:p></p> <div> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> <div> <p class=3D"MsoNormal">I am experiencing a memory leak problem in a Matlab-= Jess application and I am trying to locate the leak. I came across the defi= nition of the close() method of the QueryResult class. I have never called = this method after using queries. <o:p></o:p></p> </div> <div> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> <div> <p class=3D"MsoNormal">1) Should I call close() after using a query?<o:p></= o:p></p> </div> <div> <p class=3D"MsoNormal">2) Could not calling close() be the cause of the lea= k? <o:p></o:p></p> </div> <div> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> <div> <p class=3D"MsoNormal">If not, I would appreciate any tips on typical cause= s of leaks in Matlab-Jess applications. <o:p></o:p></p> </div> <div> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> <div> <p class=3D"MsoNormal">Thanks in advance,<o:p></o:p></p> </div> <div> <p class=3D"MsoNormal"><br> Daniel<o:p></o:p></p> </div> </div> </div> </body> </html> --_000_7F2CAF6713AFDD4392FC4DAA05671E072C7EBD9BEXMB10srnsandia_--