How do I tune the thread utilization of a WebLogic Server instance?
You tune the thread utilization of a server instance by defining rules and constraints for your application by defining a Work Manager and applying it either globally to WebLogic Server domain or to a specific application component. The primary tuning considerations are: How Many Work Managers are Needed?
What are the tuning defaults for WebLogic performance and tuning?
The tuning defaults discussed in throughout WebLogic Performance and Tuning Guiderefer to the "development mode" defaults, which is the default startup mode when WebLogic Server is installed. For information on switching the startup mode from development to production, see Changing the Runtime Modein the Administration Console Online Help.
How do I set the size of a dweblogic thread pool?
Set it by passing the following JAVA_OPTIONs on server startup: -Dweblogic.threadpool.MinPoolSize=N -Dweblogic.threadpool.MaxPoolSize=N For a starting point, try setting the thread pool min and max size to be roughly 80% of the number of system hardware threads.
What is thread pool in WLS?
The thread pool is responsible for allocating threads to do the work in WLS after requests have been dispatched by the muxer threads.
What is thread pool in WebLogic?
The thread pool allocates threads to process the requests of service servers and client servers. The default value of the selfTuningThreadPoolSizeMax MBean attribute is 400. Depending on the provider and consumer requests, you can increase the pool size to a maximum of 65534.
What are the different types of threads in WebLogic?
WebLogic thread – STUCK, ACTIVE, STANDBYSTUCK. An execute thread is classified as STUCK when the thread is stuck working on a request for more than the configured stuck thread maximum time (i.e. “StuckThreadMaxTime” parameter). ... HOGGER. ... ACTIVE. ... STANDBY. ... IDLE.
What is tuning in WebLogic?
You can tune the number of connection requests that a WebLogic Server instance accepts before refusing additional requests. This tunable applies primarily for web applications. See Tuning Connection Backlog Buffering.
How many threads can WebLogic handle?
By default, a new WebLogic Server instance is configured with a default execute queue (named "default") that contains 15 threads, which are used by all applications running on the server instance....ElementFor informationisolation-levelSee Setting Transaction Isolation Level.4 more rows
What are the 3 basic types of threads?
There are three standard thread series in the Unified screw thread system that are highly important for fasteners: UNC (coarse), UNF (fine), and 8-UN (8 thread).
What are the four types of thread?
Six Most Common Types of ThreadsUN/UNF.NPT/NPTF.BSPP (BSP, parallel)BSPT (BSP, tapered)metric parallel.metric tapered.
What is XMX and XMS in WebLogic?
Xmx - is the max size of the heap. Xms - is the initial size of the heap.( give it the same as Xmx ) XX:MaxPermSize - is is used to hold reflective of the VM itself such as class objects and method objects ( it's independent from the heap size,, give it the 1/3 to 1/4 of the Xms size depend in your classes size)
What causes hogging threads in WebLogic?
A hogging thread is a thread which is taking more than usual time to complete the request and can be declared as Stuck . How Weblogic determine a thread to declare as hogging? A thread declared as Stuck if it runs over 600 secs (default configuration which you can increase or decrease from admin console).
How do I speed up my WebLogic server?
The fine-tuned configurations that we recommend for optimizing the performance of the WebLogic application server are:Open Files.Maximum User Processes.Connection Backlog.Set TCP_KEEPALIVE_INTERVAL.Set TCP_KEEPALIVE_PROBES.Allocate Huge Pages for Java Virtual Machine (JVM) Heap.Increase Linux kernel Entropy.More items...•
Can 1 core have 3 threads?
It is pretty common to have two threads per physical core, but processors exist with other numbers. The Xeon 7000 series (Knight's Landing) can be booted with 1, 2, 3, or 4 threads per physical core, for example.
How do I increase the thread pool size in WebLogic?
Weblogic Thread Pool ConfigurationOpen Weblogic console.go to MS -> Server start -> take the session.Add below values in start up arguments. -Dweblogic.threadpool.MinPoolSize=100.Restart the server.Same steps needs to be repeated for rest of the MS in the weblogic domain.
What is the maximum connection pool size in WebLogic?
Maximum capacity If you set this value to 27 and you have eight WebLogic Server instances, in theory, WebLogic could create up to 216 database connections.
What are the different types of thread models?
There are four basic thread models :User Level Single Thread Model : Each process contains a single thread. ... User Level Multi Thread Model : Each process contains multiple threads. ... Kernel Level Single Thread Model : Each process contains a single thread. ... Kernel Level Multi Thread Model :
What are different types of thread used for?
Heavy-duty thread for soft furnishing (40) is a mixture of cotton and polyester. Rayon thread gives a nice finish to embroidery and flat stitches. Nylon is a strong thread useful for light to medium weight fabric. Invisible thread is a bit like fishing line and used for - you guessed it - an invisible finish.
What are the types of threads explain the types?
There are two types of threads to be managed in a modern system: User threads and kernel threads. User threads are supported above the kernel, without kernel support. These are the threads that application programmers would put into their programs. Kernel threads are supported within the kernel of the OS itself.
What is XMX and XMS in WebLogic?
Xmx - is the max size of the heap. Xms - is the initial size of the heap.( give it the same as Xmx ) XX:MaxPermSize - is is used to hold reflective of the VM itself such as class objects and method objects ( it's independent from the heap size,, give it the 1/3 to 1/4 of the Xms size depend in your classes size)
How many threads are in WebLogic Server?
By default, a new WebLogic Server instance is configured with a development mode execute queue, weblogic.kernel.default, that contains 15 threads. In addition, WebLogic Server provides two other pre-configured queues:
How to check performance pack?
To verify performance pack information, you can either click on a specific WebLogic Server release at the top of the page and scan the corresponding table, or use your browser's Edit —>Find feature to search for all instances of "Performance Pack" on the page.
What is WebLogic Server configuration file?
The WebLogic Server configuration file (config.xml) contains a number of performance-related parameters that can be fine-tuned depending on your environment and applications. Tuning these parameters based on your system requirements (rather than running with default settings) can greatly improve both single-node performance and the scalability characteristics of an application.
Why is it bad to add more threads to the execution queue?
Even if you add more threads, you are still limited by the power of your processor. Because threads consume memory, you can degrade performance by increasing the value of the ThreadCountattribute unnecessarily. A high execute thread count causes more memory to be used and increases context switching, which can degrade performance.
Why is it important to allocate threads to read sockets?
Allocating execute threads to act as socket reader threads increases the speed and the ability of the server to accept client requests. It is essential to balance the number of execute threads that are devoted to reading messages from a socket and those threads that perform the actual execution of tasks in the server.
What is the default startup mode for WebLogic?
The tuning defaults discussed in throughout WebLogic Performance and Tuning Guiderefer to the "development mode" defaults, which is the default startup mode when WebLogic Server is installed. For information on switching the startup mode from development to production, see Changing the Runtime Modein the Administration Console Online Help.
Where is the configuration file located in WebLogic?
Within a WebLogic Server domain, the configuration file is located on the machine that hosts the Administration Server, and provides persistent storage of WebLogic MBean attribute values. The Administration Server serves as a central point of contact for server instances and system administration tools. A domain may also include additional WebLogic Server instances called Managed Servers, which are used mainly for servicing applications.
