IBM 4.6 manual Memory, 2 CPU, Disk space

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1.3.1 Memory

All middleware components allow you to adjust how much memory they will use. When calculating how to allocate memory to middleware components, keep these considerations in mind:

•Configuring middleware memory settings too high such that the total configured value exceeds available physical memory can result in the operating system swapping memory out to disk. This will result in extremely poor performance and should be avoided. After setting up or changing the memory values for the middleware, monitor the memory and swap space used to ensure that nothing is being swapped out to disk. If it is, adjust your memory settings to correct.

•A large part of the WebSphere Application Server’s memory usage is the JVM size. However, the size of the JVM does not set an upper bound on the amount of memory that the WebSphere Application Server may use. See the IBM WebSphere Application Server section.

1.3.2 CPU

All the components of the IBM Tivoli Identity Manager product (IBM Tivoli Identity Manager application, WebSphere Application Server, database server, and directory server) are CPU-intensive. Normally, batch processes such as DSML feeds are less CPU intensive than interactive commands such as changing passwords. Operations involving workflow, such as account creation, are very computationally intensive, especially when customized workflow processes are enabled. zAAP processors, if available, should be utilized in the z/OS instances supporting IBM Tivoli Identity Manager.

1.3.3 Disk space

Each of the middleware components uses different amounts of disk space for various purposes.

•WebSphere Application Server and the IBM Tivoli Identity Manager application use disk space beyond their installation size because of log files (such as the msg.log and trace.log files) and WebSphere MQ queues. Adjust the number of archives and size of the msg.log and trace.log files in the enRoleLogging.properties file. Make sure that WebSphere MQ has enough disk space for its processing logs (not error logs) to grow. The IBM Tivoli Identity Manager server pushes many entries onto the queues during large provisioning changes, causing the queues to grow.

•IBM DB2 archive logs can consume a great deal of space for large transactions. For example, automatically provisioning an IBM Tivoli Identity Manager account for 50k people resulted in 13.5 GB of space being used. Only 2.7 GB was for account storage (both inside the LDAP Server and the historical logging in IBM DB2), the remainder, roughly 80%, was used by IBM DB2 archive logs. Frequent purging of IBM DB2 archive logs may be required for busy systems.

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IBM Tivoli Identity Manager Performance Tuning Guide

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Contents Issue Date Copyright Notice TrademarksTable of contents About this guide Who should use this guideIntroduction Vital tuningsInitial tunings Resource allocationMemory 2 CPUDisk space Workload management WLM timeout IBM WebSphere Application ServerJava virtual machine JVM size Select Container Services Select ORB Service Message driven bean MDB request timeoutTransaction timeout Change WLM timeout to wlmtimeoutSetting the values Reconciliations IBM Tivoli Identity Manager applicationRecycle bin ThreadsMaximum duration Limiting attributes returned from the adapterLimiting the attributes evaluated Select ReconciliationSet the Max Duration to maxduration IBM Tivoli Identity Manager adapters Microsoft Active DirectoryBuffer pools Idle thread timeoutAPARs Determining the values JCL location DescriptionLocks per user limit Active log duplexingReorg and Runstats Default value Recommended value Additional ZparmsIBM Ldap Server Cache sizesMax connections Indexing Changelog limitsRow locking on Searchts RunstatsBest practices Regular maintenance Other resources

4.6 specifications

IBM 4.6, known for its robust and versatile capabilities, represents a significant evolution in the realm of enterprise software solutions. This version is primarily associated with IBM's middleware offerings, notably IBM WebSphere Application Server. It is engineered to support the development, deployment, and management of web applications with a focus on scalability, reliability, and security.

One of the standout features of IBM 4.6 is its enhanced performance optimizations. The platform employs advanced caching strategies and efficient resource management to improve application response times and throughput. This means that businesses can handle heavier loads with fewer resources, making it an economical choice for enterprises of all sizes.

Another notable characteristic is its support for a wide range of programming models and standards, including Java EE. This allows developers to build applications using familiar tools and frameworks, accelerating development timelines and improving productivity. Additionally, IBM 4.6 offers robust integration capabilities with existing enterprise systems through its support for web services and messaging protocols.

IBM 4.6 also emphasizes security. It includes features such as role-based access control, data encryption, and comprehensive auditing capabilities. These measures help organizations safeguard sensitive information and comply with various regulatory requirements.

The compatibility with multiple platforms, including cloud environments, is another significant advantage. IBM 4.6 simplifies deployment across diverse infrastructures, enabling businesses to operate in hybrid environments seamlessly. This flexibility is particularly beneficial as organizations increasingly adopt cloud migration strategies.

Furthermore, IBM 4.6 is equipped with a range of monitoring and management tools. These tools provide insights into application performance and health, allowing IT teams to proactively identify and address potential issues before they impact users. This capability is critical in maintaining high availability and reliability of services.

In summary, IBM 4.6 stands out as a comprehensive solution for enterprise application development and management. Its key features, such as enhanced performance, support for industry standards, strong security measures, platform compatibility, and monitoring tools, make it a compelling choice for organizations seeking to modernize their IT infrastructure. Implementing IBM 4.6 can empower businesses to innovate faster while ensuring their applications remain secure and efficient in a rapidly evolving digital landscape.
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