Viewing page fetch pairs statistics

Use the Page Fetch Pairs Statistics window to view the estimated number of page fetches for each hypothetical number of buffer pages as an ordered set of pairs. The numbers model the number of I/Os required to read the data pages into buffer pools of various sizes.

Before you begin...

To view page fetch pairs statistics:

1. Open the Access Plan Graph window.

2. Do one of the following:

   • To see statistics on an Index node in the graph, do one of the following:
     • Highlight the index node and select Node->Show statistics.
     • Double-click on the index node.
     • Click mouse button 2 on the index node and select Show statistics from the pop-up menu.

     The Index Statistics window opens.

   • To see statistics on other indexes defined for a Table node in the graph, do one of the following:
     • Highlight the table node and select Node->Show statistics.
     • Double-click on the table node.
     • Click mouse button 2 on the table node and select Show statistics from the pop-up menu.

     The Table Statistics window opens. Click on the Indexes push button to open the Indexes window. Select one or more entries in the Indexes window and click on OK. An Index Statistics window opens for each entry that you select.

3. Click on the Page Fetch Pairs push button. The Page Fetch Pairs Statistics window opens.

4. Press F1 or click on the Help push button for instructions on how to use this window.

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