BMC Portal
Installation Notes
Version: 2.4
Kit name: BMC Performance Manager Infrastructure and Solutions
June 26, 2007

This document contains the following topics:

  • Introduction
  • Sizing your Environment
  • Portal scaling recommendations
  • Performance Manager scaling recommendations
  • Deployment and hardware recommendations
  • Small environment recommendations
  • Medium environment recommendations
  • Large environment recommendations
  • Portal and database tuning
  • Frequently Asked Questions
  • Worksheet
  • Where to get the latest product information
  • Introduction

    BMC Software scalability laboratories performed tests on the BMC Performance Manager Portal version 2.4 to determine the recommended configurations for the supported operating systems and various sizes of implementation (number of monitored servers). This document contains the recommendations of BMC Software based on the results of those tests.


    NOTE:
     

    The recommendations stated in this document are conservative and are designed to give you high performance under all conditions. You may find that a less powerful hardware configuration or fewer Remote Service Monitors (RSMs) give you acceptable performance.


    Sizing your Environment

    1. Determine which Performance Managers you will use in your enterprise.

    2. Estimate how many monitored entities (managed nodes, application instances, web servers, databases, and so forth) you will monitor.

    3. Based on the Performance Managers that you will use and the number of monitored entities in your environment, estimate the total number of parameters in your enterprise.

    4. Determine the Portal size required for your enterprise.

    5. Determine the number of RSMs required for your enterprise.

    To size your environment

    This section walks you through each of these steps using a simple set of tables that show how the results from each step accumulate. The results for each step are identified in boldface.

    You can use the Worksheet on page 19 to evaluate your own enterprise.

    1. Determine which Performance Managers you will use in your enterprise.

    This example will use the following Performance Managers:

  • BMC Performance Manager Integration with PATROL for UNIX and Linux
  • BMC Performance Manager Integration with PATROL for Microsoft Windows Servers
  • BMC Performance Manager Express for Lightweight Protocols - Ping
  • BMC Performance Manager Express for Servers - Microsoft Windows
  • 2. Estimate the number of monitored entities.

    Estimating the number of monitored entities involves taking the number of managed nodes (elements) for the target enterprise and determining which Performance Managers will be used to monitor those systems and in what quantities.

    The following table shows the number of each Performance Manager for this example. Note that these tables group the Performance Managers into one of two categories based on whether they appear in Table 2 on page 7 or Table 3 on page 9. This separation will be used in the last step to estimate the number of RSMs.

    BMC Performance Manager…

    Elements

    Parameters/
    element

    Parameter estimates

    RSM estimates

    Performance Managers constrained by parameter counts

    Integration with PATROL for UNIX and Linux

    100

     

     

     

    Integration with PATROL for Microsoft Windows Servers

    150

     

     

     

    for Lightweight Protocols—PING

    1,000

     

     

     

    Subtotal

    1,250

     

     

     

    Performance Managers constrained by other factors

    Express for Servers—Windows

    300

     

     

     

    Subtotal

    300

     

     

     

    Summary Results

    Total Portal Parameters

     

     

     

     

    Total Portal Elements

    1,550

     

     

     

    Portal Size

     

     

     

     

    Total RSMs

     

     

     

     

    In this example, none of the selected Performance Managers will be deployed together on the same element. If you have a scenario where two or more Performance Managers are deployed on the same monitoring element (for instance an OS and database Performance Manager) then record the element counts for both, but only include the element counts for one in the sum for Total Portal Elements.

    3. Estimate the total number of parameters in your enterprise.

    To estimate the total number of parameters in your enterprise, determine the total parameters for each type of the Performance Manager you plan on deploying and add them all together. To determine the total parameters for each type of Performance Manager, refer to Table 2 on page 7 and Table 3 on page 9 for estimates of the parameters per element for each kind of Performance Manager.

    For illustration purposes, assume that the machines monitored by PATROL for Microsoft Windows Servers have less than the typical workload predicted by the assumptions in Table 2. Specifically, assume that these machines will do no process monitoring and only half as much log monitoring as defined by the “Expected values” in Table 2. Using the information in the “Baseline” and “Additional parameters” columns from Table 2, the revised number of expected parameters is calculated this way:

  • No process monitoring means 10 ¥ 17 = 170 fewer parameters.
  • Half as much log monitoring works out to 5 ¥ 10 = 50 fewer parameters.
  • So the expected number of parameters for each of these elements is 880 - 170 - 50 = 660.

    The following table shows parameter estimates and totals for each Performance Manager for this example:

    BMC Performance Manager…

    Elements

    Parameters/
    element

    Parameter estimates

    RSM estimates

    Performance Managers constrained by parameter counts

    Integration with PATROL for UNIX and Linux

    100

    540

    54,000

     

    Integration with PATROL for Microsoft Windows Servers

    150

    660

    99,000

     

    for Lightweight Protocols—PING

    1,000

    5

    5,000

     

    Subtotal

    1,250

     

    158,000

     

    Performance Managers constrained by other factors

    Express for Servers—Windows

    300

    400

    120,000

     

    Subtotal

    300

     

    120,000

     

    Summary Results

    Total Portal Parameters

    278,000

     

     

     

    Total Portal Elements

    1,550

     

     

     

    Portal Size

     

     

     

     

    Total RSMs

     

     

     

     

    As illustrated by this example, the number of parameters for a particular Performance Manager can vary from the expected values in Tables 2 and 3 depending on the size of the target application on the managed node and how much you choose to monitor (for example, 10 log files generate 10 times more parameters than 1 log file for the same number of rules).

    The expected values in Tables 2 and 3 are based on fairly conservative estimates of how a typical server might be configured. The actual values for your particular managed nodes may be higher or lower.

    Refer to "Performance Manager scaling recommendations" for information on how to adjust your estimates for each Performance Manager.

    4. Determine the Portal size required for your enterprise.

    The Portal hardware requirements and the basic deployment model of Portal server components (webserver, appserver, and datastore) are divided into three categories based on the expected size of the implementation as measured by total parameters: Small, Medium and Large. These sizes are defined in Table 1 on page 6.

    To look up values in Table 1, review the mix of Performance Managers selected in step 1. on page 2 to determine whether your deployment is primarily based on Remote Monitoring, PATROL Integration, or a mix of both.

    This example has a mix, so comparing the Total Portal Parameters computed above (278,000) with the data in the 50%–50% row of Table 1, you can see that this example requires a medium Portal deployment.

    "Deployment and hardware recommendations" contains details on the number machines and hardware requirements for each of the three deployment sizes.

    5. Determine the number of RSMs required for your enterprise.

    The last step involves determining the number of RSMs for your enterprise. The sizing of RSMs must take into account the fact that not all Performance Managers impact RSM or Portal scalability in the same way.

    For Performance Managers that are constrained by parameter counts, you can assume that a single RSM can accommodate approximately 100,000 parameters. Divide the subtotal of parameters for that type of Performance Managers by 100,000 and round up the result to get the number of RSMS required for those Performance Managers.

    For Performance Managers that have other constraints, consult Table 3 on page 9 for the specific constraints for each Performance Manager that you are using, and record the results. In this example, Performance Manager Express for Servers - Windows can support no more than 200 elements on a single RSM, so 300 of those elements will require at least 2 RSMs.

    The complete results for this example are illustrated in the following table:

    BMC Performance Manager…

    Elements

    Parameters/
    element

    Parameter estimates

    RSM estimates

    Performance Managers constrained by parameter counts

    Integration with PATROL for UNIX and Linux

    100

    540

    54,000

     

    Integration with PATROL for Microsoft Windows Servers

    150

    660

    99,000

     

    for Lightweight Protocols—PING

    1,000

    5

    5,000

     

    Subtotal

    1,250

     

    158,000

    1.58

    Performance Managers constrained by other factors

    Express for Servers—Windows

    300

    400

    120,000

    1.5

    Subtotal

    300

     

    120,000

    1.5

    Summary Results

    Total Portal Parameters

    278,000

     

     

     

    Total Portal Elements

    1,550

     

     

     

    Portal Size

    Medium

     

     

     

    Total RSMs

    3.08

     

     

     

    In this example, 3 RSMs will probably suffice because the fractional RSM values are so close to an even number. However, no additional capacity would be available for more servers or additional workload in the cases where the estimated parameter counts were below those observed in the actual managed environment. A more conservative planner might choose 4 RSMs.

    Portal scaling recommendations

    This section summarizes the recommendations of this series of tests. Details of the environments and results are given in later sections.

    Table 1 lists the recommended maximum numbers of parameters for various combinations of remote monitoring and PATROL integration.

    The “Remote monitoring” column lists the percentage of parameters that are populated by remote monitoring.

    The “PATROL Integration” column lists the percentage of parameters that are populated by PATROL Integration (that is, obtaining data from PATROL Knowledge Modules).

    Table 1 General scalability recommendations—maximum number of parameters 

    Portal platform

    Remote monitoring

    PATROL Integration

    BMC Performance Manager Portal environment size

    Small

    Medium

    Large

    Windows

    100 %

    0

    123,000

    400,000

    925,000

    50 %

    50 %

    82,000

    360,000

    720,000

    0

    100 %

    54,000

    240,000

    640,000

    Solaris

    100 %

    0

     

    320,000

    640,000

    50 %

    50 %

     

    300,000

    600,000

    0

    100 %

     

    276,000

    416,000


    NOTE:
     

    To achieve similar results, BMC Portal components must be the only processes generating significant workload on the BMC Portal host computer or computers.


    Performance Manager scaling recommendations

    The tables in this section list the scaling recommendations for individual Performance Managers.

    Table 2 lists Performance Managers that are constrained by the number of parameters.

    Table 3 on page 9 lists Performance Managers that are constrained by application behavior and system resources.

    The “Expected number of parameters per element” column is the typical number of parameters that the Performance Manager instantiates for a single element.

    The “Maximum per RSM” column in Table 3 on page 9 is the maximum workload that one RSM can handle for a single Performance Manager. The maximum number of elements must be reduced when multiple Performance Managers are loaded in the Portal.

    The “Baseline” column lists any assumptions or conditions that determined the expected number of parameters.

    The “Additional Parameters” column contains an estimate of how many additional parameters will be instantiated when monitoring additional entities.

    These recommendations are based on default collection and reporting intervals. Reducing the collection interval increases workload and reduces the maximum number of parameters and elements that the RSM and BMC Portal can monitor.

    Table 2 Performance Manager scaling recommendations (part 1 of 3)

    BMC Performance Manager…

    Version

    Expected number of parameters

    Baseline

    Additional Parameters

    Express for Lightweight Protocols—Internet Protocols

    2.3.00

    60

     

     

    Express for Mail Servers

    2.3.00

    110

     

     

    Express for SNMP Devices

    2.3.00

    660

    60 interfaces

    11 parameters per interface

    Express for Web Application Servers—Apache or IIS

    2.3.00

    20

     

     

    Express for Web Servers—Apache

    2.3.00

    20

     

     

    Express for Web Servers—IIS

    2.3.00

    60

     

     

    Express for Web Transactions

    2.3.00

    60

     

     

    for Lightweight Protocols—Domain Name Server

    2.4.00

    5

     

     

    for Lightweight Protocols—PING

    2.4.00

    5

     

     

    for Lightweight Protocols—Port Monitor

    2.4.00

    5

     

     

    Integration with PATROL for DB2 Universal Database

    6.6.30

    80

     

     

    Integration with PATROL for HP Insight Manager

    1.6.00

    50

     

     

    Integration with PATROL for Informix

    9.3.10

    100

     

     

    Integration with PATROL for iSeries

    3.6.00

    80

     

     

    Integration with PATROL for Lotus Domino

    4.6.10

    480

     

     

    Integration with PATROL for Microsoft Exchange Servers

    5.1.00

    450

    • 30 cluster resources
    • 5 storage groups
    • 5 public folders
    • 5 private folders
    • 15 queues
    • 3 client roundtrip sessions
    • 5 internet roundtrip sessions
    • 5 server roundtrip sessions
    • 10 watch users
    • 2 SMTP servers,
    • 4 instances o MSEXCH_Sent_Mail
    • add 1 parameter per cluster resource
    • 1 per storage group
    • 7 per public folder
    • 7 per private folder
    • 7 per queue instance
    • 12 per client roundtrip session
    • 4 per internet roundtrip session
    • 4 per server roundtrip session
    • 10 per watch user
    • 3 per SMTP server
    • 4 per instance of MSEXCH_Sent_Mail

    Integration with PATROL for Microsoft SQL Server

    4.2.30

    40

     

     

    Integration with PATROL for Microsoft Windows Servers

    3.2.30

    880

    based on OS and 12 disks, 12 file systems, 10 processes, 3 event logs, and 10 log files

    add 6 parameters per file system, 2 per disk, 17 per process, 10 per log file, and 141 per event log

    Integration with PATROL for OpenVMS

    2.7.01

    450

     

     

    Integration with PATROL for Oracle

    8.8.20

    50

     

     

    Integration with PATROL for PeopleSoft

    2.0.05

    110

     

     

    Integration with PATROL for SAP Enterprise Portal and SAP J2EE Engine

    1.0.50

    330

    10 nodes (dispatcher or server)

    30 parameters for each additional dispatcher or server

    Integration with PATROL for SAP Solutions Suite

    5.0.00

    300

    monitoring 20 filters and 5 SLG

    add 5 parameters per filter and 40 per SLG

    Integration with PATROL for Siebel eBusiness Applications

    3.6.01

    40

     

     

    Integration with PATROL for Sybase

    10.4.20

    40

     

     

    Integration with PATROL for UNIX and Linux

    9.4.00

    540

    based on OS and 10 disks, 40 file systems, 20 processes, and 10 log files

    add 5 parameters per file system, 2 per disk, 4 per process, and 10 per log file

    Integration with PATROL for webMethods

    2.2.10

    100

     

     

    Integration with PATROL Internet Server Manager

    6.2.40

    100

     

     

    Table 3 Performance Manager scaling recommendations (part 1 of 2)

    BMC Performance Manager…

    Version

    Expected number of parameters

    Maximum per RSM

    Baseline

    Additional Parameters

    Express for Databases— Oracle

    2.4.00

    840

    100

    1 instance with 200 tablespaces

    25 per instance, 4 per tablespace

    Express for Databases—DB2 UDB

    2.4.00

    16,300

    35

    2 databases, 10 partition, and 200 tablespace

    2 parameters per database, 13 per partition, and (4¥number of partitions) per tablespace

    Express for Databases—Microsoft SQL Server

    2.4.00

    1970

    200

    20 databases and 20 filegroups

    8 per database, 4 per filegroup

    Express for Databases—Sybase

    2.4.00

    300

    100

    20 databases, 3 data cache, and 50 devices

    8 per database, 2 per data cache, and 2 per device

    Express for Servers—UNIX/Linux

    2.4.00

    70

    400

    running OS monitoring with only 10 disks and 20 file systems

    add 5 parameters per file system and 3 per disk

    370

    60

    running log management and the OS as above with 10 processes and 2 text logs with 5 rules each

    add 10 parameters per text log

    Express for Servers—Windows

    2.4.00

    400

    200

    running OS with 25 processes, 6 disk and file systems, and 3 event logs

    add 2 parameters per disk, 4 per file system, and 23 per event log

    for Citrix Presentation Server

    2.3.00

    270

    5

    20 servers with 20 applications per server

    12 parameters per server, 3 parameters per application

    for SAP

    2.1.10

    265

    20

    5 R/3 Application servers, 3 J2EE instances, 10 nodes (dispatcher or server)

    35 per R/3 Application server, 6 for each J2EE instances, 2 nodes (dispatcher or server)

    for Virtual Servers

    2.4.00

    1,700

    1

    1 element with 1 Virtual Center with 20 ESX Servers, 10 VMs per ESX Server, and TBD resource pools and TBD clusters

    add 72 parameters per VM, 49 per ESX Server, 9 per resource pool, and 17 per cluster

    Integration with PATROL for Virtual Servers

    2.0.00

    1,700

    1

    1 element with 1 Virtual Center with 20 ESX Servers and 10 VMs per ESX Server

    add 72 parameters per VM and 49 per ESX Server

    Integration with PATROL for WebSphere MQ

    4.5.00

    3,400

    30

    1 queue manager with 400 monitored queues and channels

    8 parameters per additional monitored queue and channel

    Deployment and hardware recommendations

    BMC Software recommends that you use the hardware configurations given in the following sections for the size category that your enterprise fits into.

    Small environment recommendations

    Figure 1 and Table 4 describe the hardware platform used for small Windows environments. In this case, all components of the BMC Portal and RSM are installed on one host computer.

    (Solaris cannot be used in a small environment configuration, because the RSM is supported only on Windows.)

    Figure 1 Small environment architecture

    Table 4 Computer used for application server, web server, datastore, and RSM 

    Component

    Recommendation

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    memory

    4 GB or more

    disk subsystem

    any

    disk space

    200 GB or more available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Medium environment recommendations

    Figure 2 and Table 5 through Table 7 on page 13 describe the hardware platforms used for medium-sized environments. In this case, multiple computers are used:

  • web server and application server on one computer
  • datastore on one computer
  • approximately 3 RSMs on separate computers, depending upon parameter count
  • Figure 2 Medium environment architecture

    Table 5 Computer for application server and web server—medium environment 

    Component

    Recommendation

    Windows

    Solaris

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    2 CPU 1.28 GHz UltraSPARC IIIi or better

    memory

    4 GB or more

    4 GB or more

    disk type

    any

    disk capacity

    5 GB or more available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Solaris 10 (or 9)

    Table 6 Computer for datastore—medium environment (part 1 of 2)

    Component

    Recommendation

    Windows

    Solaris

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    2 CPU 1.28 GHz UltraSPARC IIIi or better

    memory

    4 GB or more

    4 GB or more

    disk type

    any RAID

    disk capacity

    350 GB or more available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Solaris 10 (or 9)

    Table 7 describes the recommended hardware platform for each RSM that is installed on a dedicated computer. The computer must use the Windows operating system.

    Table 7 Recommended computer for RSM 

    Component

    Recommendation

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    memory

    2 GB or more

    disk subsystem

    any

    disk space

    500 MB or more available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Large environment recommendations

    Figure 3 and Table 8 on page 14 through Table 10 on page 14 describe the hardware platform used for large environments. In this case, multiple computers are used:

  • web server and application server on one computer
  • datastore on one computer
  • approximately 5 RSMs on separate computers, depending upon parameter count
  • Figure 3 Large environment architecture

    Table 8 Computer for application server and web server—large environment 

    Component

    Recommendation

    Windows

    Solaris

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    2 CPU 1 GHz UltraSPARC T1 4 Core or better

    memory

    4 GB or more

    4 GB or more

    disk type

    any

    disk capacity

    5 GB or more available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Sun Solaris 10 (or 9)

    Table 9 Computer for datastore server—large environment 

    Component

    Recommendation

    Windows

    Solaris

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    4 CPU 1 GHz UltraSPARC T1 4 Core or better

    memory

    4 GB or more

    8 GB or more

    disk type

    SAN array with Ultra 320 10K RPM drives or better

    disk capacity

    550 GB or more available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Sun Solaris 10 (or 9)

    Table 10 describes the recommended hardware platform for each RSM that is installed on a dedicated computer. The computer must use the Windows operating system.

    Table 10 Recommended computer for RSM 

    Component

    Recommendation

    processor

    2 CPU 3.2 GHz Pentium 4 or better

    memory

    2 GB

    disk subsystem

    any

    disk space

    500 MB available

    operating system

    Microsoft Windows Server 2003 Enterprise Edition SP1

    Portal and database tuning

    BMC Software recommends tuning the Portal and database for optimum performance. You can use tools supplied by BMC software to change product memory and Oracle configuration settings.

    The procedure for changing Portal Java settings is in the section “Using the installation utility to maintain the Portal” Appendix B of BMC Performance Manager Portal Getting Started.

    To modify datastore settings, run the program DatastoreInstallationTools.cmd or DatastoreInstallationTools.sh that is located in the product installation directory. Select the Datastore Maintenance tab, and then the System tab to change system settings. Redo log file size is on the Redo Logs tab.

    For more information about these utilities, see Appendix B of BMC Performance Manager Portal Getting Started.

    For Solaris medium and large environments, use of direct I/O is recommended where possible. For information on how to enable direct I/O, see the section on “Enabling direct I/O for a datastore installation on Solaris computers” in the BMC Portal Installation Guide.

    Table 11 lists optimum settings for the small environment:

    Table 11 Small environment server settings 

    Component

    Setting or attribute

    Default value

    Recommended value

    Portal

    WRAPPER.JAVA.MAXMEMORY

    512 MB

    Windows: 1,536 MB
    Solaris: 3 GB

    Datastore

    PGA_AGGREGATE_TARGET

    0

    400 MB

    Automated Memory Management SGA_TARGET

    0

    600 MB

    SGA_MAX_SIZE

    0

    600 MB

    redo logs

    500 MB

    3 redo log groups to have a single member each at 2 GB

    OPTIMIZER_DYMANIC_SAMPLING

    2

    5

    DB_CACHE_SIZE

    48 MB

    0

    SESSION_CACHED_CURSORS

    30

    75

    SHARED_POOL_SIZE

    32-bit: 8 MB
    64-bit: 64 MB

    0 a

    a When SGA_TARGET is set to a non-zero value and SHARED_POOL_SIZE is zero, Oracle dynamically allocates memory to the shared pool as needed.

    Table 12 lists optimum settings for the medium environment:

    Table 12 Medium environment server settings 

    Component

    Setting or attribute

    Default value

    Recommended value

    Portal

    WRAPPER.JAVA.MAXMEMORY

    512 MB

    Windows: 1,536 MB
    Solaris: 3 GB

    Datastore

    PGA_AGGREGATE_TARGET

    0

    400 MB

    Automated Memory Management SGA_TARGET

    0

    600 MB

    SGA_MAX_SIZE

    0

    600 MB

    redo logs

    500 MB

    3 redo log groups to have a single member each at 2 GB

    OPTIMIZER_DYMANIC_SAMPLING

    2

    5

    DB_CACHE_SIZE

    48 MB

    0

    SESSION_CACHED_CURSORS

    30

    75

    SHARED_POOL_SIZE

    32-bit: 8 MB
    64-bit: 64 MB

    0 a

    a When SGA_TARGET is set to a non-zero value and SHARED_POOL_SIZE is zero, Oracle dynamically allocates memory to the shared pool as needed.

    Table 13 lists optimum settings for the server environment:

    Table 13 Large environment server settings 

    Component

    Setting or attribute

    Default value

    Recommended value

    Portal

    WRAPPER.JAVA.MAXMEMORY

    512 MB

    1,536 MB

    Datastore

    PGA_AGGREGATE_TARGET

    0

    600 MB

    Automated Memory Management SGA_TARGET

    0

    2 GB

    SGA_MAX_SIZE

    0

    2 GB

    redo logs

    500 MB

    3 redo log groups to have a single member each at 5 GB

    OPTIMIZER_DYMANIC_SAMPLING

    2

    5

    SESSION_CACHED_CURSORS

    30

    75

    DB_CACHE_SIZE

    48 MB

    0

    SHARED_POOL_SIZE

    32-bit: 8 MB
    64-bit: 64 MB

    0 a

    a When SGA_TARGET is set to a non-zero value and SHARED_POOL_SIZE is zero, Oracle dynamically allocates memory to the shared pool as needed.

    Frequently Asked Questions

    Q. What is the impact on the scale estimates if Continuous Data Export (CDE) is used?

    A. CDE is designed to put minimum impact on the portal. The CDE database should be an equivalent configuration to the portal database and will be able to maintain the required throughput.

    Q. How will clustering of the web server, application server or RSM impact the scale estimates?

    A. Clustering addresses continued operation in the event of a failure and not performance. The scale estimates produced by this document represent the minimum number of machines required to support a given workload. If you implement clustering, you will need additional machines. The estimates should be used to ensure that in the case of a failure that the remaining components will continue to operate.

    Q. Can I deploy fewer RSM machines than the calculated results may suggest?

    A. Yes. It may be possible to run with fewer RSMs than calculated in the worksheet. The recommendations are conservative estimations based on average numbers of elements and parameters.

    The actual number of RSMs necessary for your environment may vary based on the actual hardware configuration, number of elements and parameters, and activity in your environment.

    For a new installation, as you add managed servers, compare the actual parameter counts observed in your environment to the original estimates to adjust the RSM counts as necessary.

    Q. Does having remote offices affect the number of RSM machines required?

    A. Yes. Remote monitoring across a WAN is generally not recommended (though it is possible in limited situations). Therefore, you will likely need at least one RSM for each remote location. Keep the RSM estimating guidelines in mind so that the RSMs in each remote location can accommodate the Performance Managers you plan to run at those sites.

    Q. Is the minimum RSM configuration required even if I am managing only a few systems in these locations?

    A. No, if only a few systems are being monitored, the size of system required is reduced.