<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="Street"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="address"/>  <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> Good morning,<o:p></o:p> <o:p> </o:p> One item that I notice, is that the swap memory should be at least 1 ½ times the amount of RAM you have. I personally set my systems up with 2 times the amount of RAM or in your case at least 4 GB. This will help keep your system from freezing or hanging. As far as recovering the system after a hang up, I’m not aware of anything other than a reboot.<o:p></o:p> <o:p> </o:p> Sincerely,<o:p></o:p> <div> Lee Higginbotham<o:p></o:p> Lee Higginbotham<o:p></o:p> Senior IT Technical Analyst<o:p></o:p> PIC North American Headquarters<o:p></o:p> Genus, plc<o:p></o:p> <st1:Street w:st="on"><st1:address w:st="on">100 Bluegrass Commons Blvd., Suite 2200</st1:address></st1:Street><o:p></o:p> <st1:place w:st="on"><st1:City w:st="on">Hendersonville</st1:City>, <st1:State w:st="on">TN</st1:State> <st1:PostalCode w:st="on">37075</st1:PostalCode></st1:place><o:p></o:p> Ph: 615-265-2764<o:p></o:p> Fax: 615-265-2847<o:p></o:p> <a href="mailto:lee.higginbotham@pic.com" title="mailto:lee.higginbotham@pic.com">lee.higginbotham@pic.com</a><o:p></o:p> <o:p> </o:p> <img border=0 width=59 height=85 id="_x0000_i1026" src="cid:image001.jpg@01C7469F.35EDCDB0"><o:p></o:p> <o:p> </o:p> <img border=0 width=125 height=104 id="_x0000_i1027" src="cid:image002.jpg@01C7469F.35EDCDB0"><o:p></o:p> </div> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: redhat-sysadmin-list-bounces@redhat.com [mailto:redhat-sysadmin-list-bounces@redhat.com] On Behalf Of Mahalingam Subramaniam Sent: Thursday, February 01, 2007 10:01 PM To: redhat-sysadmin-list@redhat.com Subject: to recover the swap memory<o:p></o:p> </div> <o:p> </o:p> <o:p></o:p> <table class=MsoNormalTable border=1 cellpadding=0 style='border:none; border-left:solid blue 1.0pt'> <tr> <td style='border:none;padding:.75pt .75pt .75pt 3.75pt'> <o:p> </o:p> Dear All I shall greatly appreciate and honour, if anyone can suggest the solution to the below mentioned issue. The O/S of the m/c. is RHEL AS 3.0 with kernel 2.4.21-20. with x86_64 and taroon update 3. The RAM is 2GB with swap memory another 2GB. The server is functioning as mail server and this is the only application which is loaded onto the system with a third party vendor's mail application package. For quite some time the swappable memory itself was found to be consumed rather exhausted to its full quota of 2GB by the application resulting in no free memory for subsequents tasks to execute. As a result of this not only the application but also the system itself becomes frozen/hangs. The system becomes inaccessible even through remote machines using rlogin or putty etc to revive. Being the mail sever it is not desirable to have such frequent interruption in its service. 1. The question is that how to retrieve/restore the swap memory back to its full quota? 2. How to restore the system when it attains hung state without using brute force / hot or cold boot? Your guidelines and suggestions shall be highly appreciable and valuable. with kind regards s.mahalingam S.Mahalingam Bioinformatics Centre Centre for Cellular and Molecular Biology Habsiguda, <st1:address w:st="on"><st1:Street w:st="on">Uppal Road</st1:Street>, <st1:City w:st="on">Hyderabad</st1:City></st1:address> 500 007, <st1:country-region w:st="on"><st1:place w:st="on">India</st1:place></st1:country-region>. Ph:+91-40-27192773, 27192774, 27177814 +91-40-27160222 - 41 (20 Lines) Ext: 2773, 2774 Fax: :+91-40-27160591, 27160311 E-mail: smal@ccmb.res.in smal8@yahoo.com http://www.ccmb.res.in _______________________________________________ rhn-users mailing list rhn-users@redhat.com https://www.redhat.com/mailman/listinfo/rhn-users<o:p></o:p> </td> </tr> </table> <o:p> </o:p> </div> </body> </html>