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If the output list is not big, add those fields to the index and see whether the query engine picks it up Please remember that the combined size is more important than the number of fields Adding three integer fields to the index is less expensive than adding one varchar field with an average data length of 20 If you see bookmark lookup, it means that your index is not covering Try to make it covering if it makes sense (See the preceding bullet) The execution plan selected by the query engine might not be the best one The query engine makes certain assumptions about disk subsystem and CPU cost versus IO cost These assumptions can sometimes be incorrect.

In the Routing And Remote Access console, the IP Routing node allows you to config ure basic features of IP routing. As shown in Figure 9-3, this node by default includes three subnodes: General, Static Routes, and NAT/Basic Firewall.

You configure the Routing And Remote Access service properties in the properties dia log box of the server node in the Routing And Remote Access console. These properties include routing, demand-dial, and remote access enabling; authentication configuration; client address assignment; Point-to-Point Protocol (PPP) options; and logging features.

All of these report items except headers and footers are included in the Toolbox window. The Tablix report item, for example, is available through Table, Matrix, or List elements, which you can configure by displaying the Toolbox window and dragging the component onto the design surface. Because headers and footers are not in the Toolbox window, you must configure them at the report level.

If you don t believe that the query engine s selection is the best one, run a query in the loop for 10 to 15 minutes with automatic selection, change the query to use your index (you will have to use index hint to force it), and then run it for 10 to 15 minutes again Compare the results to see which one works better..

The General tab, shown in Figure 9-4, allows you to configure the Routing And Remote Access service as a LAN router, demand-dial router, remote access server, or all three. For example, if you have selected the Local Area Network (LAN) Routing Only option and have not selected the Remote Access Server check box, neither demand-dial rout ing nor remote access will be available. Before you can even create any demand-dial interfaces, you must enable Routing And Remote Access for demand-dial routing by selecting the LAN And Demand-Dial Routing option. Similarly, to allow remote clients to connect to the local server, the Remote Access Server check box must be selected.

9

Reports can contain page headers, which are information included at the top of each page, as well as page footers, which are information included at the bottom of each page. Headers and footers are frequently used to display general report identification information such as title, page numbers, date and time of the report execution, a company logo, and user name. You cannot add data-bound fields or images directly to the page header or footer, but you can write expressions that reference data-bound fields or images. To add a page header or footer, follow these steps:

The Security tab, shown in Figure 9-5, allows you to configure authentication methods, con nection request logging, and preshared keys for Internet Protocol Security (IPSec). These security options are applied to remote access clients as well as to demand-dial routers.

Avoid any calculations or operations on the columns where possible. Some operations will prevent the use of the index on this field even if it exists for example, using the LTRIM or RTRIM functions on string data will seriously affect performance. For example, instead of using the condition cast (DateField as varchar(20)) = @dateString, try to convert @dateString to an expression of datetime type first, and then compare it to DateField. When it is not possible to avoid functions or calculations on the column, use an index built on that expression. This can be done in two ways:

The IP tab is shown in Figure 9-6. This tab allows you to configure the Routing And Remote Access service to route IP packets over LAN, remote access, or demand-dial connections. Whereas options on the General tab apply to routing, demand-dial, and remote access service in general, the function of the IP tab is to enable specifically IP traffic to pass through the various connection types. Consequently, to configure IP routing and remote access successfully, you must select appropriate options on both the General tab and the IP tab.

1. 2.

Figure 9-6