<div>Alexei,</div> <div> </div> <div> Yes, it seems to have no effect, which too is very strange. On 2.4 vm.freepages had a very easy to notice effect.</div> <div> </div> <div> There are other people having problems with buffers not being released on the list and some of them are forcing the kernel cache to be flushed with:</div> <div> </div> <div>echo 3 > /proc/sys/vm/drop_caches</div> <div> </div> <div> But I dont see this parameter on RHAS 4.0.</div> <div> </div> <div> Also, to be fair this seems to be a generic VM issue, I see this on servers that are not running ocfs2 too. And I only see this behavior on machines with more than 2Gb of memory.</div> <div> </div> <div>Regards,</div> <div>Luis</div> <div> </div> <div>Regards,<BR>Luis<BR><BR><B><I>Alexei_Roudnev <Alexei_Roudnev@exigengroup.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <META content="MSHTML 6.00.2800.1561" name=GENERATOR> <STYLE>v\:* { BEHAVIOR: url(#default#VML) } o\:* { BEHAVIOR: url(#default#VML) } w\:* { BEHAVIOR: url(#default#VML) } .shape { BEHAVIOR: url(#default#VML) } </STYLE> <STYLE> <!-- /* Font Definitions */ @font-face {font-family:Courier; panose-1:2 7 4 9 2 2 5 2 4 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";} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:blue; text-decoration:underline;} p.MsoPlainText, li.MsoPlainText, div.MsoPlainText {margin:0in; margin-bottom:.0001pt; font-size:10.0pt; font-family:"Courier New";} p {mso-margin-top-alt:auto;
margin-right:0in; mso-margin-bottom-alt:auto; margin-left:0in; font-size:12.0pt; font-family:"Times New Roman";} span.EmailStyle18 {mso-style-type:personal-reply; font-family:Arial; color:navy;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;} div.Section1 {page:Section1;} --> </STYLE> <DIV><FONT face=Arial size=2>Did you tried vm.swappiness parameter?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>(/proc/sys/vm/swappiness)</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- </DIV> <DIV style="FONT: 10pt arial">Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=blsieler@gmail.com href="mailto:blsieler@gmail.com">Brian Sieler</A>
</DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=lfreitas34@yahoo.com href="mailto:lfreitas34@yahoo.com">'Luis Freitas'</A> ; <A title=ocfs2-users@oss.oracle.com href="mailto:ocfs2-users@oss.oracle.com">ocfs2-users@oss.oracle.com</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, April 08, 2007 10:52 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> RE: [Ocfs2-users] High on buffers and deep on swap</DIV> <DIV><BR></DIV> <DIV class=Section1> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'">Luis, yes I am experiencing what appears to be a similar problem you are describing. See my post from just a few minutes ago on another thread.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY:
'Courier New'"><o:p> </o:p></SPAN></FONT></div> <div class=MsoPlainText><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy">I run a 2-node cluster with OCFS2/RAC on </SPAN></FONT>2.6.9-34.0.2.ELsmp (RHEL 4.0) as well.<o:p></o:p></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'"> total used free shared buffers cached<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY:
'Courier New'">Mem: 4044496 4005516 38980 0 34108 2236636<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'">-/+ buffers/cache: 1734772 2309724<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'">Swap: 2097144 648244 1448900<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></div> <div class=MsoNormal><FONT
face="Courier New" color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Courier New'">If you’ve uncovered anything since posting this message, please pass it along?<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></div> <DIV> <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <HR tabIndex=-1 align=center width="100%" SIZE=2> </SPAN></FONT></DIV> <div class=MsoNormal><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> ocfs2-users-bounces@oss.oracle.com [mailto:ocfs2-users-bounces@oss.oracle.com] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Luis Freitas<BR><B><SPAN style="FONT-WEIGHT:
bold">Sent:</SPAN></B> Friday, February 23, 2007 5:32 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> ocfs2-users@oss.oracle.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Ocfs2-users] High on buffers and deep on swap</SPAN></FONT><o:p></o:p></div></DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></div> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Hi,<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> This is a bit off topic, hope there is not a problem.<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> Anyone out there experiencing high swapping with the kernel retaining a large amount of buffers? This used to be a problem on 2.4, and I usually changed /proc/sys/vm/freepages to fix it. But on 2.6 this parameter no longer exists.<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> One of the servers here is holding over 3.5Gb of cache even when using over 700Mb of swap, and free memory is always low.<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV>
<DIV> <div class=MsoNormal><FONT face=Courier size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Courier">[oracle@br001sv0432 ~]$ free<BR> total used free shared buffers cached<BR>Mem: 5190736 4810880 379856 0 143032 3583868<BR>-/+ buffers/cache: 1083980 4106756<BR>Swap: 2048248 723064 1325184<BR>[oracle@br001sv0432 ~]$</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial"> I am tuning
/proc/sys/vm/swappiness, but this seems to have no effect at all. Changed from 60 to 10 and seems to have no effect. The server runs Oracle RAC with OCFS2.</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Regards,<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Luis<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <div><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<o:p></o:p></SPAN></FONT></div> <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <HR align=center width="100%" SIZE=1> </SPAN></FONT></DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><A href="http://answers.yahoo.com/dir/index;_ylc=X3oDMTFvbGNhMGE3BF9TAzM5NjU0NTEwOARfcwMzOTY1NDUxMDMEc2VjA21haWxfdGFnbGluZQRzbGsDbWFpbF90YWcx?link=ask&sid=396545367">Food fight?</A> Enjoy some healthy debate<BR>in the <A href="http://answers.yahoo.com/dir/index;_ylc=X3oDMTFvbGNhMGE3BF9TAzM5NjU0NTEwOARfcwMzOTY1NDUxMDMEc2VjA21haWxfdGFnbGluZQRzbGsDbWFpbF90YWcx?link=ask&sid=396545367">Yahoo! Answers Food & Drink Q&A.</A><o:p></o:p></SPAN></FONT></div></DIV> <div> <HR> <div></div>_______________________________________________<BR>Ocfs2-users mailing
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