HP OpenVMS systems documentation

To display the OpenVMS CPU Process Summary pane at the bottom of the CPU page, select CPU Process Summary from the View menu. Figure 3-8 shows a sample OpenVMS CPU Process Summary pane.

Figure 3-8 OpenVMS CPU Process Summary Pane

The OpenVMS CPU Process Summary pane displays the following data:

Data	Description
PID	Process identifier, a 32-bit value that uniquely identifies a process.
Process Name	Name of the process active on the CPU.
Priority	Computable (xx) and base (yy) process priority in the format xx/yy.
State	One of the process states listed in Appendix A.
Rate	Percentage of CPU time used by this process. This is the ratio of CPU time to elapsed time. The CPU rate is also displayed in the bar graph.
Wait	Percentage of time the process is in the COM or COMO state.
Time	Amount of actual CPU time charged to the process.
Home RAD	Where most of the resources of the process reside.

Displaying Single Process Information

When you double-click a PID on the lower part of an OpenVMS CPU Process Summary (Figure 3-8), Memory Summary (Figure 3-10), or I/O Summary (Figure 3-12) page, the Availability Manager displays the first of several OpenVMS Single Process pages. On these pages, you can click tabs to display specific data about one process.

This data includes a combination of data elements from the CPU Process, Memory, and I/O pages, as well as data for specific quota utilization, current image, and queue wait time. These pages are described in more detail in Section 3.3.

3.2.3 Memory Summaries and Details

The Memory Summary and Memory Details pages contain statistics about memory usage on the node you select. The Memory Summary pages displayed for OpenVMS and Windows nodes are somewhat different, as described in the following sections. The Memory Details page exists only for OpenVMS systems.

3.2.3.1 Windows Memory Summary

You can display the Windows Memory Summary page in either of the following ways:

• Double-click a node, and then click the Memory tab.
• Double-click a value under the MEM heading.

The Availability Manager displays the Windows Memory page (Figure 3-9).

Figure 3-9 Windows Memory Page

The Current and Extreme amounts on the page display the data shown in the following table. The table also indicates what the graph amounts represent.

Data	Description
Available	Size (in bytes) of the virtual memory currently on the zeroed, free, and standby lists. Zeroed and free memory are ready for use, with zeroed memory cleared to zeros. Standby memory is removed from a process's working set but is still available. The graph shows the percentage of physical memory that is available for use.
Cache	Number of bytes currently in use by the system cache. The system cache is used to buffer data retrieved from disk or LAN. The system cache uses memory not in use by active processes on the computer. The graph shows the percentage of physical memory devoted to the cache.
Paged Pool	Number of bytes in paged pool, a system memory area where operating system components acquire space as they complete their tasks. Paged pool pages can be paged out to the paging file when the system does not access them for long periods of time. The graph shows the percentage of physical memory devoted to paged pool.
Nonpaged Pool	Number of bytes in nonpaged pool, a system memory area where operating system components acquire space as they complete their tasks. Nonpaged pool pages cannot be paged out to the paging file; instead, they remain in memory as long as they are allocated. The graph shows the percentage of physical memory devoted to nonpaged pool.
Committed Bytes	Amount of available virtual memory (the Commit Limit) that is in use. Note that the commit limit can change if the paging file is extended. The graph shows the percentage of the Commit Limit used by the Committed Bytes.
Commit Limit	Size (in bytes) of virtual memory that can be committed without having to extend the paging files. If the paging files can be extended, this limit can be raised.

3.2.3.2 OpenVMS Memory Summary

When you double-click a value under the MEM heading in an OpenVMS Node pane, or if you click the Memory tab, the Availability Manager displays the OpenVMS Memory Summary page (Figure 3-10).

Alternatively, if you click the View menu on the OpenVMS Memory Summary page, the following options are displayed in a popup menu:

• Memory Summary View
• Memory Details View

You can click Memory Summary View to select the Memory Summary page.

Figure 3-10 OpenVMS Memory Summary Page

The graph in the top pane shows memory distribution (Free, Used, and Modified) as absolute values, in megabytes of memory. Current and extreme values are also listed for each type of memory distribution. (Free memory uses the lowest seen value as its extreme.) Bad Pages show the number of pages that the operating system has marked as bad. The thresholds that you see in the graph are the ones set for the LOMEMY event. (The LOMEMY thresholds are also in the display of values for the Mem field in the OpenVMS Node pane shown in Figure 3-1.)

The bottom pane displays the data shown in the following table.

Data	Description
PID	Process identifier. A 32-bit value that uniquely identifies a process.
Process Name	Name of the process.
Count	Number of physical pages or pagelets of memory that the process is using for the working set count.
Size	Number of pages or pagelets of memory the process is allowed to use for the working set size. The operating system periodically adjusts this value based on an analysis of page faults relative to CPU time used.
Extent	Number of pages or pagelets of memory in the process's working set extent (WSEXTENT) quota as defined in the user authorization file (UAF). Number of pages or pagelets cannot exceed the value of the system parameter WSMAX.
Rate	Number of page faults per second for the process.
I/O	Rate of I/O read attempts necessary to satisfy page faults (also known as page read I/O or the hard fault rate).

When you double-click a PID on the lower part of the Memory Summary page (Figure 3-10), the Availability Manager displays an OpenVMS Single Process, where you can click tabs to display pages containing specific data about one process. This data includes a combination of data from the CPU Process, Memory, and I/O pages, as well as data for specific quota utilization, current image, and queue wait time. These pages are described in Section 3.3.

3.2.3.3 OpenVMS Memory Details

When you click the View menu on the OpenVMS Memory Summary page (see Figure 3-10), the following options are displayed in a popup menu:

• Memory Summary View
• Memory Details View

To display memory details, select that option. The Availability Manager displays the OpenVMS Memory Details page (Figure 3-11).

Figure 3-11 OpenVMS Memory Details Page

The following data items are in a box at the top left of the page:

Heading	Description
Successful Expansions	Number of successful nonpaged pool expansions.
Failed Expansions	Number of failed attempts to expand nonpaged pool.
System space replication	Whether system space replication is enabled or disabled.

To the right of the box is a list of system memory data that is displayed in the bar graphs at the bottom of the page. You can toggle these data items on or off (that is, to display them or not to display them as bar graphs). You can also click a small box to choose between Linear and Logarithmic bar graph displays.

The system memory data items are described in Table 3-4.

Table 3-4 System Memory Data

Data	Description
Total memory	Total physical memory size, as seen by OpenVMS.
Available process memory	Amount of total physical memory available to processes. This is the total memory minus memory allocated to OpenVMS.
Free list	Size of the free page list.
Modified list	Size of the modified page list.
Resident code region	Size of the resident image code region.
Reserved page count	Number of reserved memory pages.
Galactic shared used	Galaxy shared memory pages currently in use.
Galactic shared unused	Galaxy shared memory pages currently not in use.
Global read-only	Read-only pages, which are installed as resident when system space replication is enabled, that will also be replicated for improved performance.
Total nonpaged pool	Total size of system nonpaged pool.
Total free nonpaged pool	Amount of nonpaged pool that is currently free.

To the right of the system memory data is a list of single RAD data items, which are described in Table 3-5. You can toggle these items to display them or not in bar graphs.

Table 3-5 Single RAD Data Items

Data	Description
Free list	Size of the free page list.
Modified list	Size of the modified page list.
Nonpaged pool	Total size of system nonpaged pool.
Free nonpaged pool	Amount of nonpaged pool that is currently free.

Below the list of single RAD items is a box where you can toggle between Percentage and Raw Data to display Current and Extreme values to the right of the bar graphs.

3.2.4 OpenVMS I/O Summary and Page/Swap Files

By clicking the I/O tab on any OpenVMS node data page, you can display a page that contains summaries of accumulated I/O rates. In the top pane, the summary covers all processes; in the bottom pane, the summary is for one process.

From the View menu, you can also choose to display (in the bottom pane) a list of page and swap files.

3.2.4.1 OpenVMS I/O Summary

The OpenVMS I/O Summary page displays the rate, per second, at which I/O transfers take place, including paging write I/O (WIO), direct I/O (DIO), and buffered I/O (BIO). In the top pane, the summary is for all CPUs; in the bottom pane, the summary is for one process.

When you double-click a data item under the DIO or BIO heading on the Node pane, or if you click the I/O tab, the Availability Manager displays, by default, the OpenVMS I/O Summary (Figure 3-12).

Figure 3-12 OpenVMS I/O Summary Page

The graph in the top pane represents the percentage of thresholds for the types of I/O shown in Table 3-6. The table also shows the event that is related to each data item. (See Section 7.6 for information about setting event thresholds.)

Table 3-6 I/O Data Displayed

Type of I/O	I/O Description	Related Event
Paging Write I/O Rate	Rate of write I/Os to one or more paging files.	HIPWIO
Direct I/O Rate	Transfers are from the pages or pagelets containing the process buffer that the system locks in physical memory to the system devices.	HIDIOR
Buffered I/O Rate	Transfers are for the process buffer from an intermediate buffer from the system buffer pool.	HIBIOR
Total Page Faults	Total of hard and soft page faults on the system, as well as peak values seen during an Availability Manager session.	HITTLP
Hard Page Faults	Total of hard page faults on the system.	HIHRDP
System Page Faults	Page faults generated by OpenVMS itself.	HISYSP
Window Turn Rate	Number of times that the file extent cache had to be refreshed.	WINTRN

Current and peak values are listed for each type of I/O. Values that exceed thresholds set by the events indicated in the table are displayed in red on the screen. Appendix B describes OpenVMS and Windows events.

To the right of the graph, the following values are listed:

Value	Description
Threshold	Defined in Event Properties.
Current	Current value or rate.
Peak	Highest value or rate seen since start of data collection.

The bottom pane displays summary accumulated I/O rates on a per-process basis. The following data is displayed:

Data	Description
PID	Process identifier. A 32-bit value that uniquely identifies a process.
Process Name	Name of the current process.
DIO Rate	Direct I/O rate. The rate at which I/O transfers occur between the system devices and the pages or pagelets that contain the process buffer that the system locks in physical memory.
BIO Rate	Buffered I/O rate. The rate at which I/O transfers occur between the process buffer and an intermediate buffer from the system buffer pool.
PIO Rate	Paging I/O rate. The rate of read attempts necessary to satisfy page faults (also known as page read I/O or the hard fault rate).
Open Files	Number of open files.
DIO Avail	Direct I/O limit remaining. The number of remaining direct I/O limit operations available before the process reaches its quota. DIOLM quota is the maximum number of direct I/O operations a process can have outstanding at one time.
BIO Avail	Buffered I/O limit remaining. The number of remaining buffered I/O operations available before the process reaches its quota. BIOLM quota is the maximum number of buffered I/O operations a process can have outstanding at one time.
BYTLM	The number of buffered I/O bytes available before the process reaches its quota. BYTLM is the maximum number of bytes of nonpaged system dynamic memory that a process can claim at one time.
Files	Open file limit remaining. The number of additional files the process can open before reaching its quota. The FILLM quota is the maximum number of files that can be opened simultaneously by the process, including active network logical links.

When you double-click a PID on the lower part of the I/O Summary page, the Availability Manager displays an OpenVMS Single Process, where you can click tabs to display specific data about one process. See Section 3.3 for more details.

3.2.4.2 OpenVMS I/O Page/Swap Files

Click I/O Page/Swap Files on the I/O page View menu to select this option. The Availability Manager displays an OpenVMS I/O Page/Swap Files page. The top pane displays the same information as that in the OpenVMS I/O Summary page (Figure 3-12). The bottom pane contains the I/O Page/Swap Files Pane shown in Figure 3-13.

Figure 3-13 OpenVMS I/O Page/Swap Files Pane

The I/O Page/Swap Files Pane displays the following data:

Data	Description
Host Name	Name of the node on which the page or swap file resides.
File Name	Name of the page or swap file. For secondary page or swap files, the file name is obtained by a special AST to the job controller on the remote node. The Availability Manager makes one attempt to retrieve the file name.
Used	Number of used blocks in the file.
% Used	Of the available blocks in each file, the percentage that has been used.
Total	Total number of blocks in the file.
Reservable	The number of reservable blocks in each page or swap file currently installed. Reservable blocks are blocks that might be logially claimed by a process for future physical allocation. A negative value indicates that the file might be overcommitted. Although a negative value is not an immediate concern, it indicates that the file might become overcommitted if physical memory becomes scarce.

The Disk tab allows you to display disk pages that contain data about availability, count, and errors of disk devices on the system. OpenVMS disk data displays differ from those for Windows nodes, as described in the following sections.

On OpenVMS pages, the View menu lets you choose the following disk summaries:

• Status Summary
• Volume Summary

Also, on the Disk Status Summary, you can double-click a device name to display a Single Disk Summary page.