C h a p t e r 8 : Pe r f o r m a n c e Tu n i n g a n d O p t i m i z a t i o n in Visual Studio .NET

Creating QR Code in Visual Studio .NET C h a p t e r 8 : Pe r f o r m a n c e Tu n i n g a n d O p t i m i z a t i o n

C h a p t e r 8 : Pe r f o r m a n c e Tu n i n g a n d O p t i m i z a t i o n
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Performance Counters Collects data from Performance Monitor counters Query Activity Captures the query text and execution plan for speci c queries
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For each Data Collection Set, you ll find two SQL Server Agent Jobs on each of the servers to be monitored, one for data collection and one for data upload to the data warehouse
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The data warehouse is the database repository for all the data being captured from your monitored SQL Server instances It is a normal SQL Server database that needs to be managed in the same way as any other database The data warehouse is purged by a SQL Server Agent Job called mdw_purge_ data[MDW], which is installed by default and removes expired data from the data warehouse based on the retention policy set in each collection set It is scheduled to run daily at 2 am, which can be changed or even run manually on an ad hoc basis, although this won t reduce the size of an overinflated data warehouse because only expired data is removed, and that is controlled by the configuration of the collection set
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The MDW reports are SQL Server Reporting Services (SSRS) reports that run against the data collected and stored in the data warehouse Three reports are provided as standard to provide reporting for the three system data collectors that are set up by default: Server Activity History Disk Usage Summary Query Statistics History The Server Activity History report, shown in Figure 8-18, shows resource utilization charts for CPU, memory, disk I/O throughput, and network I/O throughput It also shows the distribution of wait types and duration, to help you identify server bottlenecks, and general activity details like logins/sec, batches/sec, and compilations/sec The charts also provide the ability to click through for more-granular details on what makes up that measurement For example, clicking on the Memory Usage chart takes you to another chart that shows the Working Set and Page Reads/sec The Disk Usage Summary report, shown in Figure 8-19, shows data and log file growth for all the databases on the reported instance It includes a trend line to help highlight databases that are growing quickly and the average growth statistics in megabytes per day, which is useful to help with planning your future storage requirements
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Microsoft SQL Server 2008 Administration for Oracle DBAs
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Figure 8-18 The Server Activity History report
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C h a p t e r 8 : Pe r f o r m a n c e Tu n i n g a n d O p t i m i z a t i o n
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Figure 8-19 The Disk Usage Summary report
Finally, the Query Statistics History report, shown in Figure 8-20, shows the top ten worst-performing queries and allows you to click through to view more details about the execution statistics for a particular query, including the execution plan
Oracle DBA Q&A
Q: We decided to use the Spotlight and Foglight products from Quest Software to do our performance monitoring and alerting instead of using the Oracle toolset Are there similar third-party tools for SQL Server A: There are many third-party monitoring and alerting tools available on the market Taking your example of Spotlight and Foglight, SQL Server versions of these products are available from Quest; therefore, if you want to use the same approach for monitoring SQL Server as you already do for Oracle, then you can do so This also expands into the management tools; if you use Quest s Toad for management, you can also use the SQL Server version of Toad
Microsoft SQL Server 2008 Administration for Oracle DBAs
Figure 8-20 The Query Statistics History report
9
High Availability and Disaster Recovery
In This
Evaluating Business Continuity Solutions Cold Standby Solutions Warm Standby Solutions Hot Standby Solutions
Microsoft SQL Server 2008 Administration for Oracle DBAs
hen we think about high availability and disaster recovery (HA/DR) technologies in Oracle, we tend to think about the two main ones: Real Application Clusters (RAC) and Data Guard RAC provides clustering capabilities around a single database, and Data Guard provides the ability to create multiple standby databases This chapter will help you to understand the available HA/ DR technologies that are included out of the box with the Enterprise and Datacenter editions of SQL Server to enable business continuity In this chapter, we cover How to evaluate business continuity solutions Cold standby solutions Warm standby solutions Hot standby solutions
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