> #### Page Writers view

> The Page Writers view displays data about your Before-image, After-image, and Asynchronous Page Writers, as well as checkpoint information. The Page Writers view is divided into the following sections: BI summary, AI summary, Asynchronous Page Writer summary, and Checkpoint summary. See Figure 3–29, Figure 3–30, Figure 3–31, and Figure 3–32 for samples of each section.

> Figure 3–29: Before Image summary section

> Figure 3–30: After Image summary section

> Figure 3–31: Asynchronous Page Writer summary section

> Figure 3–32: Checkpoint summary section

> The Checkpoint summary page contains the following columns:

> - Start Time — The time the checkpoint started.
> - Duration — How long the checkpoint lasted.
> - # Pending — Number of database buffers not yet written to disk.
> - # Written — Number of buffers written to disk.
> - # Scan — Number of buffers written during the scan.
> - # APW — Number of buffers written from the APW queue.
> - # Flushed — Number of buffers flushed at the checkpoint.

> The data displayed in the Writer sections comes from the following VSTs:

> - _ActBILog (BI Summary View)
> - _ActAILog (AI Summary View)
> - _ActPW (APW Summary View)
> - _Checkpoint (Checkpoint Summary View)

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