Monitoring Paging Activity

Written by on Thursday, February 28, 2008 3:33 - 0 Comments

Which performance counter to use to monitor hard page faults.

Performance Monitor can be used to monitor all kinds of activities on Windows systems, but it can be tricky to figure out which counter you need to watch in order to look for a specific type of activity. For example, an administrator asked me why his server was averaging 50,000 page faults per second. I said, Wow! Then I asked him which counter he was monitoring and he said Page Faults/sec. So I pointed out to him that page faults don’t necessarily indicate disk activity i.e. hard disk reads, and that he should look at Pages/sec instead if wanted an indicator of the number of hard faults per second, which of course turned out to be a lot lower.

Moral of the story? Page Faults/sec includes both hard faults (involve disk access) and soft faults (where the faulted page is retrieved from RAM) so it’s Page/sec that you want to look at if want to measure disk activity related to paging. ')}

Article written by

Leave a Reply

You must be logged in to post a comment.

2003 server - Sep 30, 2008 22:34 - 0 Comments

instant messaging srv records

More In Computers & PC

Microsoft Outlook - Mar 22, 2009 11:22 - 0 Comments

Outlook: Duplicates in Mailbox

More In Computers & PC