ADM SAP Web AS Administration I Date Training Center Instructors Education Website Instructor Handbook Course Version: Q3 Course Duration: 5. The focus of this course is on the SAP Web Application Server. This course is a required prerequisite for attending many advanced courses in. Goals. Implementation of basic administrative tasks in a production environment. Audience. SAP system administrators, technology consultants, employees.
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ADM - Administration as ABAP I _ SAP Training and Certification Shop. Uploaded by. kenangrok · ADM - AS Java Administration (1).pdf. Uploaded by C TAW12 71 or SAP Netweaver 7 02 Certification Imp FAQ. ADM AS ABAP - Administration. PARTICIPANT HANDBOOK . N. ♡ D G ū. Lesson: Explaining the Architecture of SAP NetWeaver Application. Server. Basic Architecture of SAP NetWeaver AS. Process of a System Logon (AS ABAP). Configuration SAP Logon. Appendix – Analysis Transactions. Starting and.
The message server of the system also has these details within five minutes after the new group definitions are saved. Fundamentals ADM Figure 8: Program Buffer with the Use of Logon Groups One instance is not included in the logon groups in the figure. This is the central instance. This arrangement is useful, since it means that end users cannot log on to the central instance; only the administrators can do this. In the example shown above, the definition of the two logon groups has the following effects: With a logon using a logon group, the SAP Logon program connects to the message server of the system, and receives from it the name of the currently best performing instance of the selected logon group.
Within a logon group, end users are, for example, only using a particular application. In the example, these are the FI and SD applications. Therefore, the buffers on the instances of each of the logon groups are filled with contents from these applications. This means that the program buffer of each of the instances shown contains fewer different programs than they would without the use of logon groups. This has two possible advantages as a consequence: This means that a single logon group with the possible exception of the central instance, as implicitly assumed above is the most useful.
As there could already be entries in your local SAP Logon from other training courses, choose the following call, if it exists: This call edits your local saplogon.
Choose the Groups Use the data that your instructor gives you system ID, host name for this entry. Task 3 Set Up Logon Groups 1. Log on to your system using your new entry in SAP Logon with the parameters that your instructor gives you. Assign at least one of the two instances of your system to your new logon group. Copy and Save your entries. If the logon group that you created previously does not yet appear in the display, the message server has not yet registered the newly created logon group.
This is done automatically every five minutes. You can therefore generate the list again after a few minutes. Log on to your system using the new entry in your SAP Logon. Note that an entry can already exist for a system in the sapmsg.
However, this entry does not point to the training system that you are using. Confirm the following window by choosing OK. Fundamentals ADM 2. In the following dialog box, enter any name for your new logon group in the Logon Group field. Use the F4 help for the Instance input field to select an instance that you want to assign to the new logon group.
Then choose Copy. To do this, choose the Create assignment button again. Remember to Save after making entries. Analysis Transactions 22 Lesson Duration: In the ADM course, this must not, however, lead to a detailed repetition of content from the SAPTEC course, as some participants may already know the listed functions from that course. Business Example You want to obtain an overview of the transactions that help you to perform your daily work as a system administrator.
Common Administration Tasks The transactions shown in the figure below help you to deal with daily system administration work. You should already be familiar with the usage and interpretation of most of these transactions.
Analysis Transactions Figure 9: From there, it is possible, among other things, to go to the user list transaction SM04 or the work process overview transaction SM50 for a selected instance. You can use transactions SM04 and AL08 to obtain an overview of the users logged on to the system. Note that only those users that are logged on to the instance from which you called this transaction are displayed in transaction SM Unlike SM04, transaction AL08 provides only display functions.
Transaction SM50 provides an overview of the work processes configured for an instance. Like transaction SM50, transaction SM66 provides other functions in addition to purely display functions. You can manage lock entries in the lock table of the enqueue work process using transaction SM Use transaction SM21 to analyze the system log.
If you want to send all users in your SAP system a message, you can use transaction SM02 to send a system message. It is also possible to restrict the recipients to users of a certain client, or users that are logged on to a particular instance. A system message appears for users when they next perform an action. Update The majority of updates in the SAP system are processed by the update work process.
It is the task of the administrator to ensure smooth processing of the update. You can use transaction SM13 to monitor the update requests. If an update work process is not able to successfully process an update request, by default, the end user that created the affected data receives a message from the system. The affected update request is displayed in the overview of the update requests with the status canceled.
Use the administration data for an update request to find the cause of the termination. You can display this information by choosing the Update header button in transaction SM After you have solved the problem, the end user usually recreates the data that was not updated. Analysis Transactions 25 Exercise 2: Common Administration Transactions Exercise Duration: Task Basic Administrative Transactions 1.
Determine the number of instances available to you in your system and their names. How many work processes does your entire SAP system have?
Of which types? How many users are currently logged on to the same instance on which you are working? Call your Own Data user defaults. In a new session, check the currently active locks in your system. Use another new session to delete the session holding the locks. There are two options for doing this. What happens to the locks? Fundamentals ADM Solution 2: Transaction SM66 shows all work processes of a system, unlike transaction SM In transaction SM66, you can also show the work process that is currently processing your user request, by choosing Settings and deselecting the option Hide own work processes used analysis.
Analysis Transactions 4. You can set user defaults in a new session that opens automatically. Do not restrict the selection of locks. There should be an active locks that is connected to changing your user defaults. The instance that, together with the database, creates a runnable SAP system, is called the central instance central instance.
Fill in the blanks to complete the sentence. What types of work processes are there in the SAP system? Choose the correct answer s. SAP systems use work process multiplexing work process multiplexing technology to process user requests. Which button s can you use to create new entries in the SAP Logon system list? What possible advantages does the correct use of logon groups offer? With which transaction can you obtain an overview of the instances of your SAP system?
Transaction SM13 SM13 is used to manage the update requests. The instance that, together with the database, creates a runnable SAP system, is called the central instance. An instance consists of a dispatcher and multiple work processes. The instance itself is therefore not a work process.
In addition to the correct work process types listed above, there are also background work processes. SAP systems use work process multiplexing technology to process user requests. B, D, E You can use the Properties button to display the properties of an entry. You can use the Logon button to log on the selected system.
B, C The users still need to log on to the system in the normal way after logon groups have been configured. Creating logon groups is not a prerequisite for setting buffer sizes of above 1 GB. B Transaction SM50 lists the work processes of an instance. Transaction SM52 does not exist, and transaction SM04 calls the user list for an instance. Transaction SM13 is used to manage the update requests. The associated starting and stopping of the database is not explained here, as the specifics of the individual databases are too different.
The most important log and trace files that are created by the SAP system, the database, or the operating system are also introduced. The sequence of the required steps is important: Start services - start database - start the central instance - start other dialog instances. The sequence when stopping is exactly the reverse. These are two of the basic tasks of system administration.
You will also learn about the available log and trace options, to be able to react correctly if an error occurs. System Start: Starting the SAP System System Shutdown: Stopping an SAP System Appendix - Database Logs Process Lesson: Process 36 Lesson Duration: In addition to the actual start sequence, the concept of services under Microsoft Windows is discussed in detail. The processes for other operating systems are analogous.
The start sequence is important: Database services and SAP services, the database, the central instance, the other dialog instances. Business Example As the administrator of SAP systems, you need to stop the systems for maintenance purposes or after changing system parameters, and then restart them.
Preparatory Work: To be able to demonstrate the starting of the SAP system, you may have to shut it down first. To do this, log on to your server with the Terminal Server Client. Register the databases on your server. The system now requests a database user with password for each database.
Then choose the Close button in the Register Database window. The green selection indicates that the databases have been started. Start or stop the relevant database and then choose the green Online or red Offline button. Starting an SAP system is an initial process with which every administrator should be familiar. You should emphasize at this point which components of an SAP system should be started in which sequence.
To be able to start the SAP system, the database must first be started. This unit deals only with starting and stopping the SAP system, and does not discuss starting and stopping the individual database systems.
Figure Start the database: Before the SAP instances are started, this must have operational status. The database is therefore always started as the first step. Start the central instance: This is a standalone program that runs in the operating system background, independently of SAP instances. It collects data about operating system resources and makes this data available through the shared memory of all SAP instances.
Only once the message and enqueue servers are active can other instances be started, if desired. Start other instances: When starting programs in the Microsoft Windows environment, you should note that these programs are only active as long as the user is logged on to the system. The SAP system therefore uses the concept of services to start. These are programs that are automatically started and administered by the operating system.
Services provide support to other programs and run even if there are no users logged on to the host. Starting and Stopping the SAP System ADM When starting programs in the Microsoft Windows environment, you should note that these programs are only active as long as the user is logged on to the system.
When a user logs off, all of his or her programs are ended. The Service Control Manager starts the services installed in the registry during the startup of Microsoft Windows All services can be configured for automatic startup.
During the installation of the SAP system, SAP and database services are installed in addition to the operating system services. SAP Services: Collects performance data for one or more SAP instances and runs once for each host. Controls the SAP instances and runs once for each instance.
Database Services: Process Present the individual steps of starting an SAP system.
Choose the node for the central instance in the tree. Call up the context menu with the right mouse button and choose the Start function.
The system first checks whether the database is active. If not, it is automatically started. Other instances can then be started. The status of the SAP system, individual instances, and the message server and dispatcher are displayed in the Microsoft Management Console in accordance with the following color legend: System Demo: Log on to your server with the Terminal Server Client. Open the Microsoft Management Console. Display the entries for the training systems and the corresponding instances.
Start the central instance first and then the dialog instance. The specifications of the instances; that is, the type and number of processes, main memory sizes, and other options are controlled at the start of the instances using profiles. Process When the instances are started, SAP Service reads which processes message server, dispatcher are to be started from the instance-specific start profile.
The specification of the configuration of the instances is stored in the default profile and in the instance profile. These profiles are read by the dispatcher, which starts the work processes and creates the instance-specific configuration. After the instance has been successfully started, all work processes connect to the database. Process 41 Exercise 3: Monitor the start of the processes of your system.
To do this, log on to the server for your training system using the Terminal Server Client. Which process types are started at operating system level after your system is started up?
Check whether your system started correctly. To do this, log on to your SAP system and call the process overview. Compare the list of processes at operating system level with the process overview in the SAP system. Start the SAP instances by entering the command startsap. Start the central instance first and then the dialog instances. Choose the display resolution for the remote connection on your front end, and choose Connect.
Start the Microsoft Management Console by double clicking the appropriate icon. Choose the node for the central instance in the Microsoft Management Console tree.
Select the desired instance and choose the Start function from the context menu right mouse button. Start the dialog instance in the same way. You should always start the central instance first. The following process types are started at operating system level after your system is started up: An assignment can be made using the process ID.
Logs Lesson: Logs 45 Lesson Duration: To correct these problems, the administrator analyzes logs and trace files that were generated during the system start. Messages generated during the start process are logged by the operating system and the SAP system. Clarify which information is logged by which system.
Depends on the setup for your course. User ID: Usually ADM Freely definable, initially set to init. Set up instructions: See the information for the exercises.
Show the SAP system log files in the directory g: Logging the Start Process The start process is an especially important phase, which is logged by the operating system, the SAP system, and the database. If the SAP system does not start up, you can find the relevant error message in the log files. It may be that there were problems starting the database, meaning that the SAP system could not subsequently be started. Logging of the Start Process Under Microsoft Windows All messages that are created by services or the Microsoft Management Console are recorded at operating system level by an event logging service, the Event Manager.
This Event Viewer writes an event log which contains the following components: List of errors, warnings, and information that is generated by application software. Events such as log ons and log offs and user access to files. Choose the relevant component from the menu bar. The system displays a list of errors, warnings, and information that have been generated.
For detailed information, double click a particular log. If there are problems during the start, these logs can provide useful information such as error messages or problem descriptions. The starting processes write to the individual files, depending on the sequence in which they are listed in the start profile. The contents of these log files therefore depends on the individual system setup, and could, for example, be as follows: Information about the start process of the database system.
Information about the start process of the message server. Information about the start process of the dispatcher. The possible values for this parameter are: Error messages and a complete trace The higher the trace level, the larger the amount of logged information, and therefore the larger the size of the files.
You should therefore only increase the default value for short periods for problem analysis. The trace level can be set separately for individual work processes in the process overview transaction SM Problem Analysis Figure Problem Analysis Discuss again the procedure to be followed if problems occur when starting an instance.
Logs If the SAP system does not start correctly, this can have a variety of causes. To analyze the problem, proceed as follows: For more information about this, see the lesson: Logs Lesson Summary You should now be able to: Stopping the database is a separate process.
The sequence in which the SAP instances are shut down is important: If the SAP system is stopped due to a kernel upgrade, under Microsoft Windows the SAP-specific services must also be stopped, as the kernel files cannot otherwise be overwritten.
You can deliberately violate the recommended stop sequence and show that it is still possible to log on to the dialog instances.
However, it is not possible to perform meaningful work, as central functions of the message and enqueue server are no longer available. Discuss with the participants what the administrator should consider before stopping the SAP system and how he or she can inform the users about the stopping of the system. Describe how the other components of an SAP system can be stopped. You could additionally demonstrate starting and stopping the SAP system using a command call with the commands startsap and stopsap.
Stopping the SAP System It can be necessary to stop an SAP system for a variety of reasons, such as to restart after permanently changing profile parameters, before installing kernel patches, or to allow hardware upgrades to be carried out. This involves, among other things: Check which users are logged on using the User List SM Check which jobs are active using the Job Overview SM If jobs are terminated by the system stop, these must be rescheduled.
Jobs that are scheduled for the time in which the system is stopped run automatically once the system is restarted. The transaction Batch Input: Session Overview SM35 displays running batch input jobs. These records are then updated again during the restart. Before you stop your system, you should inform users using a system message SM Stopping the instances: Depending on whether you have selected an individual instance or the SAP system, the following are stopped: The service itself is not stopped.
The services themselves can be stopped and restarted with the Microsoft Windows Service Control Manager. The database is stopped using the relevant database system tools.
Before you stop the SAP system, check which users are logged on to your system. Send a system message. To do this, log on to the server for your training system with the Terminal Server Client. Check whether your SAP system is running at operating system level. Enter the command stopsap to stop an instance. To stop the entire SAP system, first stop the dialog instance and then the central instance. The command stopsap only stops the selected instance.
If the database is to be stopped, this must be done using database tools. In this transaction, you will find your own user more than once. This means that your own user, which initiates the RFC connections, is displayed additionally once per instance.
Choose the Create pushbutton, enter the system message text, and choose Save. Select the desired instance s and choose the Stop function from the context menu right mouse button. Depending on whether you have chosen an individual instance or the SAP system, either an individual instance or the entire SAP system is stopped.
The script startsap first starts the saposcol process, which collects statistical data for the operating system and provides it to the SAP system. The next step is a check to see if the database is running. If not, the script startdb is called to start the database. The final step starts all of the processes for the instance message server, dispatcher, work processes, and so on.
After the central instance is started, you can optionally start other instances. The startsap script can be called with the following options: Starts the database system R3: Starts the instances and associated processes for the instance ALL: Stopping When you stop the SAP system, you should first stop all dialog instances and then stop the central instance.
You have two options for doing this: The stopsap script can be called with the following options: Stops the database system with the help of the stopdb script R3: Stops the database system and the instance default setting, can be omitted The database can be stopped separately with database tools. All associated SAP services are started together with the subsystem such as dispatcher, work processes, spool processes. Appendix - Starting and Stopping with Other Operating Systems The system displays a screen with the column Status at the right-hand side.
It can take a few minutes for the file system to reach this status. The default value is two minutes. If it takes longer than two minutes for the instance to be shut down, an exception message is sent. You must first start processes that allow the SAP work processes to connect to the database. If the saposcol process has not yet been started, this is started first. The processes of the central instances are then started.
The work processes then connect to the database. Other instances can then optionally be started Figure Check that the ICLI servers have been stopped.
Stop the database. Appendix - Database Logs 65 Lesson Duration: Business Example If an error occurs, the system administrator needs to access the database log files to find the cause of the error. The system messages are recorded in the kernel log knldiag. This contains the following messages in chronological order: A new log file is created after every start of the database system. A backup copy of the old log knldiag. All error and warning messages concerning the database system are recorded in the error log knldiag.
Multiple versions of these error log files are stored as Errlog. The oldest available version is stored as Errlog. At every restart of the SQL server, the oldest file is overwritten. If a serious database problem occurs, you should backup the oldest file before the restart, so that this information is not lost.
These error log files can be displayed in the Enterprise Manager. The last six versions of this log are also retained. Detailed information about errors is logged in the Oracle Trace File: If the system administrator administers the database with sapdba, this writes its own log files in the following directories: This path is configured in the database manager configuration. The db2diag. Application IDs allow the comparison of entries that belong to one application in the file db2diag.
These files are only created if a serious internal DB2 error occurs. If you want to display the contents of an error log or a trace file, double click the file. Informix Figure In certain cases, the contents of the shared memory are copied to the files shmem.
The file names follow the naming convention ICLI. The ICLI servers also send messages to the communication partners of the client. These are logged in the developer traces and in the system log of the SAP system. There are four four trace levels; error messages and warnings are displayed, by default, at level 1 1. You can obtain an overview of the scheduled background jobs with transaction SM37 SM You can use transaction SM02 SM02 to send a system message to the users that are logged on.
The message server is started once for each SAP system, and the gateway server is started once for each instance. There are four trace levels; error messages and warnings are displayed, by default, at level 1. You can obtain an overview of the scheduled background jobs with transaction SM You can use transaction SM02 to send a system message to the users that are logged on. In transaction SM37, you can select by client and user, among other things.
In transaction SM02, you can restrict the sending of the message to instances or clients. How the System Evaluates its Parameters Configuring the System Parameters How to Set System Parameters Maintaining the System Parameters Setting up Operation Modes This default configuration can be changed using entries in the profile files.
Explain the sequence in which the parameters are imported. The profile files are created during the installation.
Explain the significance of these files when starting the system. Describe which information is stored in the individual profile files. Configuring the System Parameters The configuration of the individual instances and therefore of the SAP system is performed using system parameters.
The default values for these parameters are defined in the program code of the kernel. How the System Evaluates its Parameters Figure Assigning System Parameters You can change these default values using the profile files, which are read when an instance is started.
These profile files are created during the installation of the system and can also be edited later. As the profile files are only read when the system is started, you must restart the instance or the entire system after changing parameters.
Dynamic switching; that is, while the system is running, is only possible for a small number of system parameters.
After installation is complete, the profile files are stored at operating system level in the directory: This directory can be read by all instances of an SAP system using the share or mount technique. The SAP system has three system profiles.
These are: In doing so, the user must ensure himself or herself that the changes are performed correctly. Incorrectly set parameters can lead to the system not starting.
It is far more convenient and safer to change the profile parameters using the resources in the SAP system. Show the profile files at operating system level. To do this, go to the directory g: Make a backup of the profile files. To do this, create a separate directory and copy the files there. Profile Files: These are, for example, the message server and the dispatcher. It contains system-wide settings, such as the system name, the name of the database server, the name of the enqueue server, or also the default logon client.
Viewing System Parameters Demonstrate how transaction RZ11 can be used to display the values and information for the individual system parameters. The current values of the system parameters can be displayed in the system. There are two ways to do this. Both functions display the system parameters for the instance to which the user is currently logged on. You can restrict this list to specific parameters. A table displays the system default value for the individual parameters, as it is defined in the program code of the kernel, and, if the default value has been overridden by a profile parameter, the user-defined value.
A short description and, if required, documentation for the parameters can also be displayed. It also displays whether the parameter can be changed while the system is running with the Dynamically Switchable indicator. You can use transaction SE16, for example, to display this table. The command sappfpar all returns a list of all parameters. You can check the parameters that are set using sappfpar check.
The command sappfpar help returns a short overview of possible options. How the System Evaluates its Parameters 81 Exercise 5: Configuring the System Parameters Exercise Duration: Determine the values of the following system parameters: Name of the application server, number of work processes on the central instance dialog, background, enqueue, update, spool , maximum number of sessions permitted per logon a You can determine the values of system parameters by running the report RSPFPAR.
The parameter names are as follows: Name of the local application server: Number of work processes on the central instance: Explain the individual steps that need to be performed in transaction RZ10 to maintain the profiles.
Emphasize that choosing Activate means that the profiles are written from the database to the file system and that changed parameters only take effect after a restart of the system. Business Example As an administrator, you are to adjust the configuration of the system parameters.
Administering and Maintaining Profiles If you want to change profile parameters, you can make these changes using operating system-specific editors. However, this procedure has certain dangers, as the user must ensure himself or herself that the changes are performed, and also documented, correctly. Incorrectly set parameters can prevent an instance starting. The SAP system therefore provides integrated profile administration and parameter maintenance.
How to Set System Parameters Figure Profile Administration Profile administration in the SAP system offers the following advantages to the user: To be able to use the profile administration of the SAP system, the profiles must be imported into the database.
During this import, the system performs a consistency check and a check of the way in which the parameters interact. Changes to profile parameters can then be performed in the SAP system, with the previously mentioned advantages.
These are then stored in the database, and written back to file level. These changes only take effect when they are read by the system; that is, at a restart of the system. You perform the administration and maintenance of profiles in transaction RZ After selecting the profile to edit, you can change individual profile parameters.
There are three different levels for maintaining the profiles. The administration data contains the type of profile start, default, or instance profile , a short description, the path of the file, the name of the instance, and the time of the last activation. You can perform the maintenance of the parameters of the individual profiles through either basic maintenance or extended maintenance.
Basic maintenance allows you to adjust the most important parameters and supports the user through the use of logical descriptions. Extended maintenance displays the unformatted content of the profile; that is, the technical names of the profile parameters. In extended maintenance, you can not only change the values of individual parameters, but also add new parameters and delete existing parameters. How to Set System Parameters The changes are stored in two steps.
In the first step, the changes are temporarily copied when you choose Copy. The values are permanently saved to the database in a second step when you choose Save.
The changes are therefore successfully saved to the database and must now be written at operating system level. Changes to the default profile take effect only after a restart of all instances in the entire system. Changes to these files are, however, the exception rather than the rule. Use transaction RZ10 to import all profiles.
Show the differences between the different views. Change individual profile parameters in the basic maintenance Caution: Save and activate your changes and restart the system. Log on again after the restart and show the changes that have been made in the system.
Additional functions available in transaction RZ10 are the consistency check and the comparison of profiles. Profile Consistency Checks During a consistency check, the system checks the syntax and the semantics for individual or for all profiles. The all profiles option also contains a consistency check between the profiles of a type.
This means that, for example, the system checks for the start profile whether only one message server is being started for each system. During the comparison of profiles, the system compares the profile that is in active use with the profile stored in the database. This comparison is automatically performed when an instance is started.
If the system identifies a difference between the active profile and the profile stored in the database, it displays a message in the Alert Monitor. How to Set System Parameters 89 Exercise 6: Maintaining the System Parameters Exercise Duration: Task 1 Save Profile Files First back up the profile files.
To do this, create a Backup directory under C: Import all profiles into your SAP system. Change the values of the following parameters: Consider which profiles you are performing changes in. Save and activate your changes.
Check your changes in the system. To do this, log on to the system again and check the number of work processes in the process overview. Restart the system so that your changes become active. Check your changes in the system again. How to Set System Parameters Solution 6: A check log displays the result of the import.
Select the desired parameter and choose Change or double click the relevant parameter. After making your changes, choose Copy and then Save. Then, in the list view, choose Copy and then Back. Save the new version of the profile and confirm the activation of the profile in the dialog box. To create a new parameter, choose Create under Extended Maintenance.
The required parameters are listed below: Check that your selected logon client is entered. Task 3 Activating the Changed Profile Parameters Check the changed system parameters after a system restart. How to Set System Parameters 2. Check the default logon client on the logon screen and check the number of work processes for the dialog instance.
Setting up Operation Modes Lesson: Setting up Operation Modes 95 Lesson Duration: You will learn how to set up a dynamic switch of work process types using operation modes. Discuss the fluctuating requirements that users have of the system during the course of a day. System resources that are available to dialog work processes during the day are not required during the night.
Clarify that no additional work processes are created with the concept of operation modes. There is simply a change in the type and distribution of the work process types. The total number of work processes remains the same. Describe the individual steps for setting up operation modes in transaction RZ Exceptions to this rule are possible using exception operation.
Business Example The configuration of the work processes using the profiles usually meets the requirements for day operation. The administrator can use operation modes to optimize the performance of the system for the different requirements during the day and during the night. During the day, a large number of dialog users, who want to be served with high performance by the system, are working. Therefore, a large number of dialog work processes should be available for users during the day.
During the night, however, only a small number of these dialog work processes are used, and the system can be used to a larger extent to process background jobs. Concept of Operation Modes The type and number of work processes for each instance is defined in the profiles.
The distribution of work processes in the profiles is optimized for fast dialog response times; that is, there are usually lots of dialog work processes and a small number of background work processes. This means that during the night, system resources, such as the main memory, are tied to the dialog work processes, or are not fully utilized by the background processes, such as the CPU. It is therefore practical to define different types and numbers of work processes for these different demands on the SAP system.
This is realized through the concept of operation modes. Setting up Operation Modes Figure Adjusting Instances to the Load Distribution Using the operation modes, you can adjust the type and distribution of the work processes to the varying load distribution during the day.
You can also adjust the distribution of the work processes to business requirements that only occur once. By defining operation modes, you can change not only the total number of work processes defined in the profiles, but also the type and distribution of the individual work process types within this total number. The switch between the work process types is performed dynamically during the runtime of the SAP system.
The switch is triggered using a defined schedule. A reserved work process is not immediately terminated, but marked for switching. This means that certain delays may occur. This type change is logged in the system log. During the switch of the operation modes, neither the instance nor the affected work processes need to be restarted.
This means that the quality of the buffer of the SAP system is retained during an operation mode switch, and that the request that is currently being processed by a work process is completed. The individual work processes retain their process ID after the switch, which can be observed in the process overview SM Setting Up Operation Modes The operation modes are set up in a number of steps. The allocation should be made primarily between the dialog and background work processes.
A general time definition that applies almost all of the time is set using normal operation. In rare cases, in which a special distribution of the work processes for unusual system loads is required, these are defined using exception operation. Scheduling Operation Modes If you do not define a timetable for normal operation, no switch of operation modes is made.
The configuration in the instance profile remains active. The exception operation can only be defined as a unique event. Change the distribution of the work processes of the instances for each of the operation modes.
Define a timetable SM63 , in accordance with which the system is to switch between the operation modes. Demonstrate the possibility for scheduling exception operation. Manual switching between the operation modes and starting and stopping instances. Switch between the operation modes manually in the Control Panel. Show the switch in the process overview. Stop the dialog instance from the Control Panel and then restart it again.
Introduction to System Configuration ADM Discuss the places in the system in which information about the definition of the work processes is stored. Explain that this can lead to inconsistencies and that in this case, the operation mode is not switched.
The Control Panel RZ03 allows you to monitor the instances and the operation modes. It provides functions to: You can first simulate the switch of operation modes; that is, the system checks for which instances a switch can be performed. If it is not possible to switch between operation modes, this is usually due to inconsistencies in the SAP system.
Setting up Operation Modes processes is defined differently in different places in the system. These are the instance profile at operating system level, the instance profile in the database, and the definition of the operation modes themselves. Profile Consistency Checks If, for example, the number of work processes in the profiles is later changed, the system can no longer switch operation modes until after a restart of the instance. It is therefore necessary to adjust the configuration of the operation modes after a change to the profiles.
Setting up Operation Modes Exercise 7: Setting up Operation Modes Exercise Duration: Task 1 Create Operation Modes Create operation modes. To do this, use transaction RZ04 to perform the following steps. Now create a definition for the work process distribution for all instances of your system. Change the distribution of the work processes of your instances for each of the operation modes. Note that there should be at least two dialog and two background work processes in all operation modes.
Task 2 Schedule Operation Modes Schedule the operation modes that you have created. Schedule the operation modes that you have created in the timetable for normal operation. Task 3 Manual Switch of Operation Modes 1. How can you observe the change of the work process distribution? Never worked on real Hybris Projects? Do not be scared. Lol nope. Finding a carpool is easy and effortless with TwoGo. Hope you enjouy reading it as much as I have enjoyed writing it.
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