HP 3000 Manuals HP 3000 Manuals
Gaining Altitude
Draw graphs based on global information:
1. From the Draw Graphs dialog box, select the following:
a. Graph=Global Bottlenecks.
b. X-Axis=Year.
c. Points Every...=Day.
d. Shift=All Day.
e. Starting Day=1 March 1988.
2. Click OK.
Because of the large amount of data the first graph contains, it
will take a moment or two to display it.
![[]](../../pic3k/M011530/FFN13c50.gif)
Global Bottlenecks Graph
Take a minute to examine this graph. The X-Axis, at the bottom of the
graph, is labeled with months and days (with slightly longer "tick" marks
indicating the specific dates shown). The first date should be 1 March
1988. Notice that an entire year is shown even though the data does not
fill the graph completely. This allows you to compare different time
periods using the same scaling on the X-Axis. If you prefer not to have
that much blank space on the right, you can zoom-by-time on the graph as
explained below.
Optional Section--Zoom-by-Time
When you zoom-by-time, you enlarge a portion of a displayed graph for a
closer look at the data. To do this:
1. Select the Time command from the Zoom menu.
After you do this, the menu box disappears, but nothing else on
the screen seems to change. Actually, a small check mark to the
left of the Time command indicates it is enabled. You can confirm
this by clicking the Zoom menu again.
Once Zoom Time is enabled, it will remain enabled until you
disable it, or you enable Zoom Application or Zoom Process.
Do not select Time again. The selection process operates like a
toggle switch, and if the command is already enabled, clicking it
again will turn it off.
If the check mark is not there, click Time again to select it
again. If you want to leave the Zoom menu without making any
changes, click anywhere outside the menu area.
2. Place the cursor at the left edge of the area you want to
enlarge--the point on the X-Axis from where you want to start your
examination.
3. Hold down the mouse button, and drag the mouse to the right.
As you move the mouse, a dark (highlighted) area forms from the
starting point to the point where you stop. When you release the
button, a new graph is drawn expanding the selected area to fill
the X-Axis.
NOTE Zooming works only on the X-Axis. You cannot zoom (expand) metrics
on the Y-Axis.
Once you create a new graph using zoom-by-time, you can manipulate it
like any window. When you are finished, simply close it and it
disappears. You may close the parent window--the window used to create a
zoom-by-time window--without losing the zoom-by-time window itself.
Repeat the zoom-by-time procedure for this example:
1. Place the cursor to the left of the data. (Far to the left is all
right.)
2. Hold down the mouse button and drag the mouse toward the right
just beyond the area containing valid data (in this case, 25
August).
3. Release the mouse button.
![[]](../../pic3k/M011530/FFN23c50.gif)
Global Bottlenecks Graph Redrawn Using Zoom-by-Time
The Global Bottlenecks graph is redrawn containing all of the original
data, but without the empty space on the right.
Although you could close the original Global Bottlenecks graph window,
leave it open to continue this journey.
Back to the Global Bottlenecks Graph
Re-examine your original Global Bottlenecks graph. What does it show
you? The CPU Utilization curve (red) shows the system is fairly busy
throughout this interval. Utilization of 30 to 70 percent might not
sound like much, but remember, each point on the graph is an average of
an entire day (24 hours).
If this system were used steadily during the 24 hours, this amount of use
is not excessive. But if this system were used for only 8 to 10 hours
during the day, this could be serious. Remember, a system that uses its
CPU at 100 percent for 8 hours and then lies idle for the next 16 hours
shows an average use of only 33 percent for the day.
At times, averaging can hide a serious situation, but here it allows you
to examine a system over a long period without getting inundated with
detailed data.
Re-examine the Draw Graphs dialog box:
1. Select the Global Bottlenecks from the Draw Graphs dialog box.
Notice that the first selections you made when you drew the graph
are still there. Options you select become the default values
until you change them.
2. Select Points Every...=Hour (instead of Day).
To display a year's worth of data with one data point every hour
would take 8760 data points and many resources. When you select
Points Every...=Hour, HP LaserRX/MPE automatically changes your
X-Axis selection to Week, the longest interval you would want to
examine one hour at a time. This relationship between Points
Every... and the X-Axis helps you avoid mistakes such as trying
to plot one day with Points Every...=Day.
If you want to leave the Draw Graphs dialog box without drawing anything,
click Cancel.
What do other curves on the Global Bottlenecks graph mean? You can use
the Screen/Menu Help command to find descriptions of the Phys Disc and
Mem Mgr variables:
1. Select the Screen/Menu Help command from the Help menu.
The cursor changes appearance and becomes a question mark with an
arrow through it.
2. Place the point of the cursor arrow over a topic label (in this
case, Phys Disc or Mem Mgr), and click once.
Check the HP LaserRX/MPE User's Manual: Analysis Software if you have
any trouble accessing help.
Did you notice that the memory manager value is actually a disc I/O rate?
The disc I/O rate is the number of times per second that information is
swapped between main memory and disc drives.
Also notice that the green curve for memory manager runs slightly above
the zero baseline until about 21 April and then drops to zero and remains
there. This might seem odd because the other curves increase and
decrease throughout the period. What is happening to memory management?
We will find out in the next section.