weblogic tuning, check these out | What is tuning in WebLogic?

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 can I make my WebLogic server faster?

Performance Tuning Roadmap. Understand Your Performance Objectives. Measure Your Performance Metrics. Monitor Disk and CPU Utilization. Locate Bottlenecks in Your System. Minimize Impact of Bottlenecks. Tune Your Application. Tune your DB. Tune WebLogic Server Performance Parameters. Tune Your JVM. Tuning Tips.

What happens during WebLogic core server tuning?

Tuning Execute Queues for Overflow Conditions. The socket reader threads in WebLogic Server read requests and place them on the appropriate execute queue. The length of this execute queue will increase if the requests come in at a rate faster than they are processed.

How do you do performance tuning of WLS?

2 Top Tuning Recommendations for WebLogic Server
Tune Pool Sizes.Use the Prepared Statement Cache.Use Logging Last Resource Optimization.Tune Connection Backlog Buffering.Use Optimistic or Read-only Concurrency.Use Local Interfaces.Use eager-relationship-caching.Tune HTTP Sessions.

What is throughput in WebLogic?

Throughput can be defined as the number of requests processed per minute (or per second) per server instance.

How many threads can WebLogic handle?

By default, WebLogic Server sets Threads Maximum to 400.

Why is WebLogic so slow?

This is because JVM library used for random number generation relies on /dev/random by default for UNIX platforms. This can potentially slow down the startup before returning a result. Although /dev/random is more secure, using /dev/urandom instead if the startup is slow.

What are you commonly used fine tuning commands in WebLogic?

Tune your JVM’s heap garbage collection and heap size parameters to get the best performance out of your JVM.

Sun JDK
-Xms and -Xmx (use equal settings at start up)-XX:NewSize and -XX:MaxNewSize.-XX:SurvivorRatio.-XX:+UseISM -XX:+AggressiveHeap.

How does Weblogic detect memory leaks?

Collect the following information:
Enable verbose GC logging (see above) to monitor the java heap usage. This will help to understand the java memory requirement for this application. Record the process virtual memory size periodically from the time the application was started until the JVM runs out of native memory.

Why does thread count increase?

The Thread Count parameter specifies the maximum number of simultaneous requests the server can handle. The default value is 5. In general, increase this number if you have idle CPU time and requests that are pending; decrease it if the CPU becomes overloaded.

How many threads does spring boot use?

There are 30 threads. Interestingly there is no object that is bigger than 300KB, whereas our Spring Boot apps with Tomcat generally have 10 or more objects above that level.

What is garbage collection in Weblogic?

The Heap is created when the JVM starts up and may increase or decrease in size while the application runs. When the heap become full, objects that are no longer used are cleared, thus making space for new objects. This process of removing old objects is known as garbage collection.

What is XMS and XMX while starting JVM?

The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool. This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory.

What is hogging thread 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).

What is standby thread count in WebLogic?

Standby Thread Count: This is the number of threads waiting to be marked “eligible” to process client requests. These threads are created and visible from the JVM Thread Dump but not available yet to process a client request.

What is stuck thread in WebLogic?

WebLogic Server diagnoses a thread as stuck if it is continually working (not idle) for a set period of time. You can tune a server’s thread detection behavior by changing the length of time before a thread is diagnosed as stuck, and by changing the frequency with which the server checks for stuck threads.