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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>Hi Rob,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>The sleep is in the separate thread, not main thread.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>I’m not sure if in memory mapped files can be paged to disk but will investigate.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>Cheers,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>Ross.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> delphi-bounces@listserver.123.net.nz [mailto:delphi-bounces@listserver.123.net.nz] <b>On Behalf Of </b>Robert Martin<br><b>Sent:</b> Wednesday, 12 June 2013 9:05 AM<br><b>To:</b> NZ Borland Developers Group - Delphi List<br><b>Subject:</b> Re: [DUG] Memory mapped Files with no file<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi<br><br>Don't know anything about memory mapped files but two comments...<br><br>1. Try it without the sleep(). If the sleep is in the main thread it could cause you problems.<br>2. Perhaps you are low on RAM and the in memory file is actually having to be paged to disk! <br><br>Hope that's of some use :)<br>Rob<br><br>On 12/06/2013 12:02 a.m., Ross Levis wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>I’m using a shared memory component in 2 apps which communicate with each other.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>I use a shared memory component which uses a memory mapped file with no actual file on the hard drive.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>I seem to be having a problem with communications between the 2 apps when the hard drive is busy. It appears a change to the shared memory is not showing up in the other app for over 20 seconds while the hard drive is busy. Does that sound possible in your opinion?</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>It doesn’t make any sense to me but that’s all I can come up with currently. Communication appears to stop sometimes when a separate thread starts up every 24 hours to load the contents of perhaps 3000 small files into RAM. There is a sleep(15) between access of each file to prevent the drive being too busy, but yet this issue can occur sometimes during the 30 odd seconds this thread is running.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>Cheers,<br>Ross.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>NZ Borland Developers Group - Delphi mailing list<o:p></o:p></pre><pre>Post: <a href="mailto:delphi@listserver.123.net.nz">delphi@listserver.123.net.nz</a><o:p></o:p></pre><pre>Admin: <a href="http://delphi.org.nz/mailman/listinfo/delphi">http://delphi.org.nz/mailman/listinfo/delphi</a><o:p></o:p></pre><pre>Unsubscribe: send an email to <a href="mailto:delphi-request@listserver.123.net.nz">delphi-request@listserver.123.net.nz</a> with Subject: unsubscribe<o:p></o:p></pre><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com">www.avg.com</a><br>Version: 2013.0.3345 / Virus Database: 3199/6402 - Release Date: 06/11/13<o:p></o:p></span></p></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div></body></html>