>From the Explain text on the counter: Single Instance Ratio is the average number of references to each message in the mailbox store.
On Fri, May 29, 2009 at 2:13 PM, Roger Wright <rwri...@evatone.com> wrote: > I'm seeing 226.771 on my Exchange 2003 box with about 130 mailboxes. > > Is that probable? > > > > Roger Wright > Network Administrator > Evatone, Inc. > 727.572.7076 x388 > _____ > > > -----Original Message----- > From: Ben Scott [mailto:mailvor...@gmail.com] > Sent: Friday, May 29, 2009 1:31 PM > To: MS-Exchange Admin Issues > Subject: Single Instance Storage ratio survey > > Hi all, > > A thread on nt-sysadmin has got me wondering. Just how much do > people actually benefit from SIS (Single Instance Storage) in > Exchange? > > Would people be willing to share their SIS ratio from their Exchange > server(s)? > > Approximations are fine. For multi-server organizations, an average > or just picking a server at random would still inform. > > I'll start: > > SIS ratio = 5.6 > > You can discover the SIS ratio by: > > 1. Open Performance Monitor (PERFMON.EXE) > 2. Select "System Monitor" on the left > 3. Right-click the graph on the right, and pick "Add Counters" > 4. For "Performance Object", select "MSExchangeIS Mailbox" (or similar) > 5. Select the "Single Instance Ratio" counter in the list on the left > 6. Select the "_ Total" instance in the list on the right > 7. Click "Add" > 8. If needed, select the resulting counter in the list at the bottom > of the graph > 9. Look at the "Last" value reported for that counter > > -- Ben > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > ~ http://www.sunbeltsoftware.com/Ninja ~ > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > ~ http://www.sunbeltsoftware.com/Ninja ~ > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
