|Document revision date: 30 March 2001|
The Sort, Filter, and collection interval settings at the data window level affect performance. Follow these guidelines to balance customization with performance:
Changing several system settings might improve the performance of
DECamds on your system. The following sections discuss these settings
and how to change them.
220.127.116.11 Setting Data Link Read Operations
Increase read operations to the data link by changing the logical name AMDS$COMM_READS in the AMDS$CONFIG:AMDS$LOGICALS.COM command procedure. The AMDS$COMM_READS logical name controls the number of requests for data (read operations) queued to the data link.
If you increase data collection, increase the number of requests that
can be queued. Compaq recommends two requests for each node being
monitored. Each read operation queued requires 1500 bytes of BYTLM
18.104.22.168 Setting the Communications Buffer
Increase the communications buffer by changing the logical name AMDS$COMM_BUFFER_SIZE in the AMDS$CONFIG:AMDS$LOGICALS.COM command procedure. The buffer controls the size of the global section used for communication between the provider node and the communications process.
When DECamds cannot keep up, it displays the following warning message:
AMDS$_COMMBUFOVF---communications buffer overflow. Increase the buffer by 25 percent.
In addition to increasing the value of the AMDS$COMM_BUFFER_SIZE logical name, set the system parameter GBLPAGFIL on the provider node to cover the increase. This adds to the amount of data collection that DECamds can perform.
The value of the GBLPAGFIL system parameter must always be higher than the number of FREE_GBLPAGES. To determine the value of FREE_GBLPAGES, enter the following commands:
$ A = F$GETSYI("FREE_GBLPAGES") $ SHO SYM A
The value of A must conform to the following formula:
2 * ( (buffer_size / 512) + 512)
Table 5-7 provides an approximate guideline for the number of nodes you can monitor when running DECamds on certain computer types.
|Monitoring Computer Type||Number of Nodes Monitored|
|Observation Only||Observe and Fix|
|VAXstation 4000 Model 60||20-60||20-50|
|VAX 6000 1||75-150||65-130|
|VAX 4000 Model 90||75-150||65-130|
|DEC 3000 Model 400||0-50||0-50|
|DEC 4000 Model 620||0-70||0-70|
|DEC 7000 Model 720||Any number||Any number|
Follow these suggestions when choosing and configuring a console:
This appendix explains how to install the DECamds Data Analyzer software on OpenVMS Alpha and OpenVMS VAX Version 6.2 and later systems.
Beginning with OpenVMS Version 7.2, the Data Provider ships as part of the OpenVMS installation. Installing or upgrading to OpenVMS Version 7.2 or later automatically installs the Data Provider on your system. You can run the Data Provider on any VAX or Alpha Version 6.2 or later system.
The Compaq Availability Manager web site might refer you to a more recent version of the Data Provider than the one on the current OpenVMS VAX or Alpha operating system CD-ROM. Compaq recommends that you install the DECamds Data Provider software using the version indicated at the following URL:
Section A.7 explains how to start using the Data Provider.
This chapter contains the following sections:
DECamds provides online release notes. Compaq strongly recommends that you read the release notes before proceeding with the installation. You can print the text file of the release notes from the following location:
DECamds consists of client and server software:
In earlier versions of OpenVMS, you needed to install both both the
Data Analyzer and Data Provider software on your system from the latest
DECamds kit. Beginning with OpenVMS Version 7.2, you need to install
only the Data Analyzer software on the system where you run the client,
or graphical user interface. You need to do this to obtain the new
library for DECamds Version 7.2 and later.
A.2 Data Analyzer Installation Requirements
This section provides a checklist of hardware and software requirements for installing the DECamds Data Analyzer. A typical installation takes approximately 5 to 10 minutes per node, depending on your type of media and system configuration.
|Number of Monitored Nodes||Recommended Alpha Hardware||Recommended VAX Hardware|
|1-30||DEC 3000 Model 400, 32 MB||VAXstation 3100, 16 MB|
|20-50||DEC 3000 Model 400, 64 MB||VAXstation 4000 Model 60|
|40-90||DEC 3000 Model 500||VAXstation 4000 Model 90|
|91 or more||DEC 4000 Model 620||VAX 6000-420|
OpenVMS VAX Version 6.2 or higher
OpenVMS Alpha Version 6.2 or higher
DECwindows Motif for OpenVMS Version 1.1 or higher installed on the Data Analyzer node system.
|Monitor only (read-only access)||OPER|
|Implement fixes (write access)||OPER, CMKRNL|
|Stop, start, reload, or restart the Data Provider node. Includes changing security or group name.||OPER, CMKRNL, LOG_IO, SYSNAM, SYSPRV|
For OpenVMS Version 6.2 and later, if the Data Provider is running on the same node as the Data Analyzer node, you must also have either SYSPRV privilege or ACL access to the RMA0: device.
$ SHOW DEVICE SYS$SYSDEVICE
ASTLM >= (AMDS$COMM_READS*3)
BIOLM >= (AMDS$COMM_READS+1)
BYTLM >= (AMDS$COMM_READS*1500)
TQELM >= (AMDS$COMM_READS*2)
On both Alpha and VAX systems, Compaq recommends that you perform a system disk backup before installing any software. Use the backup procedures that are established at your site. For details about performing a system disk backup, see the OpenVMS Backup utility documentation.
The Data Analyzer software is available on the OpenVMS operating system layered product CD-ROM or from the Compaq Availability Manager web site.
Follow these steps to download the software from the web:
DECamds - Alpha: decamds0721b.pcsi-dcx_axpexe DECamds - VAX: decamds0721b.pcsi-dcx_vaxexe
The next section provides installation instructions for the Data
A.4 Installing Data Analyzer Software from a PCSI Kit
This section describes the installation procedure on an OpenVMS Version 6.2 or later systems from a POLYCENTER Software Installation (PCSI) kit.
$ PRODUCT INSTALL AMDS/SOURCE=device directory/HELP
Percent Done: 15% ...30% ...46% ...62% ...76% ...92% %PCSI-I-SUCCESS, operation completed successfully
%POLYCENTER Software Installation utility %INSTAL-E-INSFAIL, The installation of DECamds 7.2-1B has failed.
Sample Installation on an OpenVMS Alpha System
Example A-1 shows a sample installation on an OpenVMS Alpha system. This sample was run on a system that had no previous version of DECamds installed. Depending on which layered products you have on your system, you might see additional messages and questions when you perform your installation.
|Example A-1 Sample OpenVMS Alpha Installation|
$ product install amds The following product has been selected: DEC VMS AMDS V7.2-1B Layered Product Do you want to continue? [YES] Configuration phase starting ... You will be asked to choose options, if any, for each selected product and for any products that may be installed to satisfy software dependency requirements. DEC VMS AMDS V7.2-1B: DECamds (Availability Manager for Distributed Systems) V7.2-1B COPYRIGHT © © 1994, 1995, 1999 -- All rights reserved Compaq Computer Corporation License and Product Authorization Key (PAK) Information Do you want the defaults for all options? [YES] DECamds Data Provider Installation Verification Procedure DECamds Startup File DECamds Logicals Customization File DECamds Data Provider Security Access File DECamds Data Analyzer Security Access File DECamds Data Analyzer Installation Verification Procedure (IVP) IVP may fail due to the following PQL values being too low: PQL_MASTLM, PQL_MBIOLM, PQL_MTQELM, or PQL_MBYTLM See the file AMDS$SYSTEM:AMDS$PCSI_IVP_OUTPUT.LOG for help on failure. Do you want to review the options? [NO] Execution phase starting ... The following product will be installed to destination: DEC VMS AMDS V7.2-1B DISK$ALPHA_V72:[VMS$COMMON.] Portion done: 0%...20%...30%...40%...50%...60%...70%...80%...90%...100% The following product has been installed: DEC VMS AMDS V7.2-1B Layered Product %PCSI-I-IVPEXECUTE, executing test procedure for DEC VMS AMDS V7.2-1B ... %PCSI-I-IVPSUCCESS, test procedure completed successfully DEC VMS AMDS V7.2-1B: DECamds (Availability Manager for Distributed Systems) V7.2-1B This product requires the following SYSGEN parameters: GBLPAGES add 1172
Perform the following tasks after installing DECamds on Data Provider nodes:
$ @SYS$STARTUP:AMDS$STARTUP.COM STOP
$ @SYS$STARTUP:AMDS$STARTUP.COM STOP
$ @SYS$STARTUP:AMDS$STARTUP.COM START
Starting, stopping, or reloading DECamds (the AMDS$STARTUP.COM procedure) requires at least TMPMBX, NETMBX, SYSNAM, LOG_IO, and CMKRNL privileges. Use the OpenVMS Authorize utility (AUTHORIZE) to determine whether users have the required privileges and then make adjustments as needed.
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