November 2008
Intermediate to advanced
910 pages
27h 16m
English
book
Professional Microsoft® SQL Server® 2008 Administration
by Brian Knight, Ketan Patel, Wayne Snyder, Ross LoForte, Steven Wort
Content preview from Professional Microsoft® SQL Server® 2008 Administration
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17.2. Monitoring Database Mirroring
There are different ways to monitor database mirroring, based on what information you want to track. For basic information about the database mirroring state, safety level, and witness status, you can use catalog views. Refer to the "Database Mirroring Catalog Views" section earlier in this chapter for more details about catalog views. To monitor the performance of database mirroring, SQL Server 2008 provides a set of System Monitor performance objects. There is also a GUI "Database Mirroring Monitor" available with SQL Server 2008 Management Studio, which you can access if your database is mirrored. We discuss both the key System Monitor counters and the GUI in this section.
17.2.1. Monitoring Using System Monitor
The object SQL Server: Database Mirroring has plenty of counters to monitor database mirroring performance. You can use these counters to monitor the database mirroring activities on each partner, and the traffic between them, as shown in Figure 17-6. You can do this for each database instance, so if you are mirroring more than one database on a server, select the database you want to monitor from the list box. The key counters are described in the following sections.
17.2.1.1. Counters for the Principal
The following System Monitor counters are used on the principal server:
Log Bytes Sent/Sec: The rate at which the principal is sending transaction log data to the mirror
Log Send Queue KB: The total kilobytes of the log that have ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.