Monday, March 12, 2012

Monitoring log usage

Hi Everyone,
I'mn setting up a proposal for a new hard drive for one of our SQL servers.
In an effort to get supporting data, I've defined performance counter logs for both %Disk and %Idle. Currently, %Idle is a minimum of 74.161 and a maximum of 100.081. After I get the new drive installed and move the logs over to that drive, I expect the
se percentages to change.
Question: Are there any other counter(s) I should be using to get more exact data that exposes the benefits of having the log files on a different hard drive?
Thanks in advance
Larry
You should always have the log on a separate physcial drive from the data
for 2 reasons ( irregardless of stats) if there is going to be anything more
than minimal use of the database.
1. separate random IO from Serial IO... Log is serial(mostly) and data files
are random (mostly).
2. If you need up to the minute recovery without loss of data, you'd better
have your log on a separate drive...
Wayne Snyder, MCDBA, SQL Server MVP
Mariner, Charlotte, NC
www.mariner-usa.com
(Please respond only to the newsgroups.)
I support the Professional Association of SQL Server (PASS) and it's
community of SQL Server professionals.
www.sqlpass.org
"Larry" <Larry@.discussions.microsoft.com> wrote in message
news:8A16AAEB-D472-4037-90EE-1D9B9EB5A202@.microsoft.com...
> Hi Everyone,
> I'mn setting up a proposal for a new hard drive for one of our SQL
servers.
> In an effort to get supporting data, I've defined performance counter logs
for both %Disk and %Idle. Currently, %Idle is a minimum of 74.161 and a
maximum of 100.081. After I get the new drive installed and move the logs
over to that drive, I expect these percentages to change.
> Question: Are there any other counter(s) I should be using to get more
exact data that exposes the benefits of having the log files on a different
hard drive?
> Thanks in advance
> Larry

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