...excellent. thanks Tim! _______________________________________________ Jon Luchette Emerson Hospital Technology Specialist III Work: 978-287-3369 Cell: 978-360-1379 jluchette@xxxxxxxxxxxxxxx _______________________________________________ ________________________________ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Mangan Sent: Friday, September 22, 2006 1:04 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: High Page Swaps Jon, First, you should do the following to confirm if this really is a performance issue. Page swapping occurs when overall system memory usage gets high. But not all page swapping is a performance issue. A page swap is counted any time a process tries to access a memory page that is not in its working set. This might mean that the page was swapped out to disk and is no longer in memory and has to be read in "on-demand" (called a hard page fault). It might also be a soft page fault, where the memory has been removed from the working set as part of the page-out procedure but is still present on a virtual memory page. With a soft page fault the memory is immediately restored to the working set with very, very, little overhead. One should look at the "pages in" counter from the OS to determine the hard-fault rather than the "page fault" counter which includes both hard and soft faults. You can confirm this using whatever management tool you have handy, including the "performance monitor" that is included in the OS. Only if the "pages in" counter is high should you consider it a performance issue worth concerning yourself with. In that case you want to look for processes with high memory use, especially one that keeps growing over time which may indicate a memory leak bug. Tim Mangan From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Luchette, Jon Sent: Thursday, September 21, 2006 10:20 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] High Page Swaps Hello - I am using the advanced load monitor on MF XP FR3 sp4 running win 2k3 sp1 boxes on BL35p hardware booting from SAN. Every once in a while I notice that the Page Swaps Rule is maxed out 100% on one or two of my servers when I check within the CMC. How would I track down the culprit to try and stop this from reoccurring? Thanks! Jon Luchette