What are the various thread states in a WebLogic server?
In general there is a number of different thread states in Java: NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING, TERMINATED.
What are WebLogic threads?
Threads are execution points that WebLogic Server delivers its power and execute work. Managing threads is very important because it may affect the overall performance of the entire system. In previous releases of WebLogic Server 9.0 we had multiple execute queues and user defined thread pools.
What is the difference between stuck thread and hogging thread?
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 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.
What are standby threads in WebLogic?
In WebLogic 11g the possible status of a thread is: Standby (i.e. in a pool where threads non currently needed are put by WebLogic) Idle (ready to take a new request) Active (a request is executing)
What are standby threads?
Standby Threads. The number of threads in the standby pool. Threads that are not needed to handle the present work load are designated as standby and added to the standby pool. These threads are activated when more threads are needed.
What is difference between heap dump and thread dump?
A thread dump is a dump of the stacks of all live threads. Thus useful for analysing what an app is up to at some point in time, and if done at intervals handy in diagnosing some kinds of ‘execution’ problems (e.g. thread deadlock). A heap dump is a dump of the state of the Java heap memory.
What is stuck thread max time?
Stuck Thread Max Time : Enter the number of seconds, that a thread must be continually working before this server diagnoses the thread as being stuck. By default, WebLogic Server considers a thread to be “stuck” after 600 seconds of continuous use.
What is a Heapdump?
The term Heapdump describes the JVM mechanism that generates a dump of all the live objects that are on the Java™ heap, which are being used by the running Java application. There are two dump formats, the text or classic heap dump format and the Portable Heap Dump (PHD) format.