| Previous | Contents | Index |
DLB Plus STATUS checks critical SYSGEN parameter values and working sets. DLB Plus STATUS displays the dynamic SYSGEN parameters changed by DLB Plus software, and shows process memory adjustment information.
In addition, DLB Plus STATUS evaluates STATIC SYSGEN parameters. If they should be changed to improve system performance, DLB Plus STATUS suggests new parameter values.
8.1 Running DLB Plus STATUS
You can run DLB Plus STATUS at any time and as often as you wish. To
run DLB Plus STATUS, select the STATUS menu item from
the DLB Plus Master Menu. To EXIT, press [Return].
8.2 The STATUS Display
The display generated by DLB Plus STATUS consists of five major
sections. A description of each section follows.
| Example 8-1 DLB STATUS Display |
|---|
** DLB STATUS Utility Vx.x **
(1)DLB Version : Vx.x
(2)DLB Cyc Compl : 962 Mem Adj Cutoff : 1273 Adj Last Cyc : 0
Total Proc Adj : 0 # Inactive Proc : 0 Eval Last Cyc : 27
Total System Memory : 57344
Free List Size : 20548
(3)QUANTUM : 6 PFRATL : 0 RSRVPAGCNT : 512
IOTA : 1 PFRATH : 10 MPW_THRESH : 8602
AWSTIME : 6 WSINC : 1009 PQL_MWSEXTENT : 14300
PIXSCAN : 6 SWPOUTPGCNT : 1536 PQL_MPGFLQUOTA : 20300
(4)SYSMWCNT : 2764 *Value low*, CHANGE TO 3456
MPW_HILIMIT : 8601
MPW_LOWAITLIMIT : 4301
Modified List Size : 5615
Modified list % full : 65%
(5)Pagefile 0, total 196600 99% free
|
Before DLB Plus can analyze I/O and lock data, a sample of the system must first be taken. To sample your system, choose the SAMPLE menu item. The SAMPLE item collects I/O data by taking a snapshot of the images (programs) currently running on the node that you are logged onto.
The collected data contains I/O and lock information on the files used by the running images. In addition, OpenVMS does its own I/O to internally used files (such as the SWAP and PAGE files...and installed images). I/O and lock information is also collected on these internally used files.
Sampling a typical system takes five to fifteen minutes, depending on system load. On a very large system, sampling could take 30 to 40 minutes.
If there are two or more nodes on your cluster, samples can be taken for each node.
9.2 Multiple Samples
Normally, you CREATE a new sample and then analyze the created sample.
However, sometimes you may wish to collect multiple samples of a single
node and then analyze the multiple samples. This can be done by
APPENDING a new sample to existing samples.
For example, at the end of the week you might want to analyze multiple samples that have been appended during the week. On Monday, you could CREATE a new sample. During the week, multiple samples can be APPENDED together. At any time during the week, an analysis of the multiple samples can be performed by just selecting the sampled node.
For best overall accuracy, it is suggested that you CREATE or APPEND samples during peak times. For most data processing centers, these times are 11:00 AM and 2:00 PM.
After the sample has been taken, the sampled system (node) is automatically SELECTED for analysis purposes.
9.3 Consolidating Sampled Node Data
In a VAX Cluster environment, it can be useful to SAMPLE various nodes
and then CONSOLIDATE the sampled data. Data consolidation gives a
cross-cluster profile of your system's I/O activity.
In order to consolidate data, each node to be included in the consolidation must first be SAMPLED. After all nodes have been sampled, choose the CONS menu item to create a consolidation.
After the consolidation has completed, it is automatically SELECTED for analysis purposes.
9.4 Selecting Nodes and Consolidations for Analysis
Before DLB Plus reports and graphs can be generated, you must first
SELECT a node or consolidation. The selected node must have previously
been SAMPLED or CONSOLIDATED.
To select a node, choose the SELECT menu item. You are asked for the name of a previously SAMPLED node. If you don't remember which nodes have been sampled, type SHOW at the "Node name or consolidation" prompt.
After a node or consolidation has been selected, its name is displayed at the bottom of each menu screen as a reminder.
SAMPLING a node or creating a CONSOLIDATION automatically SELECTS that node or consolidation. |
9.5 AUTOSAMPLE Procedure
For your convenience, we have supplied with DLB Plus a procedure to
automatically sample your system and generate reports (optional).
To activate the automatic sampling procedure, start up DLB Plus and choose the AUTO item from the main menu.
This procedure starts up a batch process which samples the system at specified intervals. Optionally, after the last sample has been taken, the batch process generates and prints DLB Plus summary reports. The reports print to SYS$PRINT or a selected device. If you have a VAX Cluster, execute the AUTO procedure from each node on the cluster.
DLB Plus generates a wide variety of reports and graphs. In order to
help you remember the names of the various reports and graphs menu
items, the following naming convention has been used:
RSxxx for Report (summary)
RDxxx for Report (detail)
Gxxxx for Graph
To get a list (menu) of the summary reports, choose the SREPORTS item from the "Reports and Graphs" section on the DLB Plus Master Menu.
To get a list (menu) of the detail reports, choose the DREPORTS item from the "Reports and Graphs" section on the Master Menu.
To get a list (menu) of graphs, choose the GRAPHS item from the "Reports and Graphs" section.
For example, if SREPORTS is selected, the following list of summary reports is displayed:
+-----------Summary Analysis Reports------------+
| |
| PERFORMANCE REPORTS |
| RSHOT Hot File Analysis (High I/Os) |
| RSCACHE Suggested Files for Data Caching |
| RSFRAG File Fragmentation Analysis |
| RSDEVICE I/O Analysis Summary by Device |
| |
| PLANNING REPORTS |
| RSIMAGE I/O Analysis Summary by Image |
| RSUSER I/O Analysis Summary by User |
| RSPID I/O Analysis Summary by PID |
+-----------------------------------------------+
|
The various DLB Plus report and graph procedures ask a number of questions prior to the generation of the report or graph. Some or all of the following questions are asked by these procedures.
10.2.1 Maximum Number of Records
Enter the maximum number of records to include in the report. Enter ALL
to include all records.
For example, if you want to see the data for the twenty most used files, enter 20. Enter ALL if you want to see the data for all of the files that were open during the sample.
10.2.2 Include OpenVMS Internal Files
The OpenVMS operating system keeps a number of files open and active.
Some of these files include:
By default, DLB Plus does NOT include these OpenVMS internal files in its analysis. However, in some cases, including these files can be useful in understanding where all I/O is occurring on the system.
The file I/O counts of OpenVMS internal files reflect all I/Os to these files SINCE THE SYSTEM WAS LAST BOOTED.
Enter YES if you want to include OpenVMS internal files; otherwise enter NO.
10.2.3 Sort by I/O Count or I/O Rate
Each time a node is sampled by DLB Plus, both the I/O count (total I/Os
per file) and the I/O rate (number of I/Os per second) are recorded.
Choosing COUNT organizes your report from highest I/O count to lowest I/O count. This gives a good overall summary of files with high I/O counts SINCE THE FILES WERE FIRST OPENED.
Choosing RATE organizes your report from highest I/O rate to lowest I/O rate. This gives a summary of files that had high I/O rates AT THE TIME THE SAMPLE WAS TAKEN.
By default, DLB Plus sorts by I/O rate. Enter either COUNT or RATE at the "sort order" prompt.
10.2.4 Proceed with the Report or Graph
Most reports can be generated in less than ten minutes.
Enter YES to proceed with generating the report or graph. Enter NO to return to the previous question. |
As a report is being created, the number of records processed and report information is displayed to the user. This information appears as follows:
+----------------------------------------+
| DLB Plus |
| Report Generation Statistics |
| |
| Hot File Analysis (High I/O) |
| |
| Records searched: 17 |
| Records selected: 17 |
| Records read : 17 |
| Pages printed : 2 |
| EST time to go : |
+----------------------------------------+
|
10.2.6 Report Printing Options
When report or graph generation is completed, you are asked to select
where output should be directed. Choices are:
+--------------------- Output Options ---------------------+
| Screen | System Printer | Laser Printer |
| Printer Port | Save to Disk | EXIT |
+----------------------------------------------------------+
|
Most items on the DLB Plus menus can be set up in a batch stream and submitted as a batch process. The batch process can be run at any date and time that you choose. Or, you can choose to submit the batch manually later.
The batch procedure items on the Master Menu are:
The BATCH menu item allows you to switch DLB Plus into batch set-up mode. When DLB Plus is put into batch set-up mode, the subsequently chosen menu items and question answers are written to a batch command file instead of executed immediately.
| Example 11-1 BATCH Set Up |
|---|
DLB Plus Dynamic Load Balancer PLUS 01-Sep-1995
Set Up Batch Stream
Batch File Name : SYS$SCRATCH:DLBP_TTI.BAT
Purpose of Batch: DLB Plus batch run for node TTI
Print command : PRINT/IDENTIFY
Batch Command File Name? SYS$SCRATCH:DLBP_TTI.BAT_____________________________
EXIT = Exit \ = Back HELP = Help
|
Enter a complete file name for the batch command file or just press [RETURN] to accept the default.
11.1.2 Purpose of This Batch
Enter the purpose of this batch. Enter any text by which you wish to
identify this batch, or just press [RETURN] to accept the
default. You can enter up to 45 characters of text.
Example:
Purpose of this Batch Stream? DLB Plus batch run for node TTI__
|
Enter the DCL print command to be used in printing BATCHED reports. You can include any DCL PRINT qualifiers that you wish. Enter the word NONE to suppress the printing of reports (they are still generated...but not printed).
Examples:
Print command for reports? PRINT/IDENTIFY (this is the default)
Print command for reports? PRINT/form=xyz (print on form type XYZ)
Print command for reports? none (don't print reports)
|
Finally, you are asked whether to proceed with the batch set up. If EXIT is entered, the batch is NOT set up, the screen is cleared and the Master Menu is displayed.
If YES is entered, the message "Now in Batch Set Up Mode" is printed at the bottom of the screen. The screen clears and the Master Menu is displayed.
DLB Plus is now in batch set up mode.
Choose the items from the DLB Plus menus that are to be included in this batch. Any items selected from the menus while DLB Plus is in batch set up mode become part of the batch stream. As each item is selected, an information message such as "(item name) included in batch stream" is displayed.
If you intend to have your batch stream SAMPLE, do NOT also choose the SELECT menu item. The sampled node is automatically SELECTED by the SAMPLE procedure. |
After all items to be included in this batch have been chosen, the batch stream can be submitted for processing.
11.3 Submitting a Batch
When all items to be BATCHED have been specified, choose the
SUBMIT menu item to submit the batch stream for
processing. When this item is selected, the following screen is
displayed:
| Example 11-2 Submitting a Batch |
|---|
DLB Plus Dynamic Load Balancer PLUS 01-Sep-1995
Submit Batch Stream
Batch File Name : SYS$SCRATCH:DLBP_TTI.BAT
Purpose of Batch: DLB Plus batch run for node TTI
Print command : PRINT/IDENTIFY
Batch Run Date :
Batch Run Time :
Batch Queue :
Batch Run Date (MMDDYY)? 090295
...or enter "LATER" to submit manually later on
EXIT = Exit \ = Back HELP = Help
|
11.3.1 Batch Run Date
DLB Plus asks for the run date of this batch in MMDDYY format. The
current date is provided as a default. LATER can be
entered to submit the batch at a later time.
If LATER is entered, the message "Command file prepared for manual submission later..." is displayed at the bottom of the screen. The screen is cleared and the Master Menu is redisplayed.
11.3.2 Batch Run Time
Enter the time at which you want this batch to run. Enter the time in
HH:MM or HH:MM am/pm format. Ambiguous hour values are handled as
follows:
0, 6-11 (default to AM)
1-5, 12 (default to PM)
|
Examples:
07:00 (assumes AM) 19:00 (assumes 07:00 PM)
07:00 AM 02:45 (assumes 02:45 PM)
2:45 AM 415 (assumes 04:15 PM)
|
Enter the name of the batch queue to be used when this batch runs. You can accept the default or another batch queue can be entered instead.
11.3.4 Proceed with the Submit
You are asked whether to proceed with the batch submission process. If
EXIT is entered, the screen is cleared and the Master Menu is displayed.
If Yes is selected, the message "Command file submitted for batch processing..." is printed at the bottom of the screen. The screen clears and the Master Menu is displayed. DLB Plus is no longer in batch set up mode.
11.4 Cancel Batch Set Up
If DLB Plus is in batch set up mode and you wish to cancel the batch
stream creation, the CANCEL menu item can be selected.
You are asked whether to proceed with the batch cancellation process. If No is selected, the batch is NOT cancelled, the screen is cleared and the Master Menu is displayed.
If Yes is selected, the message "Batch Set Up Mode has been canceled" is printed at the bottom of the screen. The screen is cleared and the Master Menu is displayed. DLB Plus is no longer in batch set up mode.
| Previous | Next | Contents | Index |