Issues with backgating flowjo 10 how to#
Issues with backgating flowjo 10 code#

Issues with backgating flowjo 10 code#

The existence of any high or medium CPU thread is indicative of an application bottleneck, i.e., a piece of inefficient code that is executing frequently and taking up CPU. High and medium CPU threads are defined as threads that take up more than 50% CPU and 30-50% CPU respectively. By periodically collecting these statistics, monitoring tools can correlate thread level performance information with the CPU usage of the Java application and answer the question вЂњWhy is the Java application taking high CPU?вЂќ.ДЇigure 1 below depicts the eG Enterprise screen that monitors threads in a JVM. Using JMX, Java monitoring tools can explore what threads are running in the JVM, the state of each thread, the CPU usage of each thread etc. Managing and monitoring applications can be designed and developed using the Java Dynamic Management Kit. Those resources are represented by objects called MBeans (for Managed Bean). According to Wikipedia, Java Management Extensions is a Java technology that supplies tools for managing and monitoring applications, system objects, devices and service-oriented networks. Modern JVMs (1.5 and higher) support Java Management Instrumentation (JMX) APIs. JVM Monitoring Can Assist with Diagnosis of CPU Issues It is, therefore, essential to identify the cause of the CPU spike: is it due to poorly designed application code, insufficient memory allocation, or an unexpectedly high workload? Restarting an application will not solve a CPU usage problem вЂ“ it only mitigates the problem for a short while, until the problem reappears. The server capacity may not be sized sufficiently to handle the rate of requests coming in and in such a situation, the Java application may be doing work, trying to keep up with the workload. A JVM may max out on CPU usage because of the incoming workload.Instead of spending time in processing, the JVM spends more time in Garbage Collection, which in turn takes up CPU cycles. Shortage of memory in the Java Virtual Machine (JVM) can also reflect in high CPU usage.Poorly designed application code with inefficient loops: Recursive method calls, inefficient usage of collections (e.g., excessively large ArrayLists instead of say using HashMaps) can also be reasons for this.

Java applications may take high CPU resources for many reasons:

Issues with backgating flowjo 10 how to#

A key question then is: how to troubleshoot high CPU usage of a Java application? Why Do Java Applications Take High CPU? Often the solution to this problem is to restart the application and, lo and behold, the problem goes away вЂ“ only to reappear a few days later. When this happens, application response becomes sluggish and users begin to complain about slow response.

If you have deployed a Java application in production, youвЂ™ve probably encountered a situation where the application suddenly starts to take up a large amount of CPU.