log « performance « Java Testing Q&A

1. Know of any Java garbage collection log analysis tools?    stackoverflow.com

I'm looking for a tool or a script that will take the console log from my web app, parse out the garbage collection information and display it in a meaningful way. I'm ...

2. Enclosing calls to debug() in if isDebugEnabled(): a good policy?    stackoverflow.com

Our team has the policy of doing logging like

if (LOGGER.isDebugEnabled()) {  
  LOGGER.debug("model[" + model + "]");
}

LOGGER.debug("model[" + model + "]");

3. How to regulate the amount of printouts generated by a logging instruction produces over time?    stackoverflow.com

How can I limit a program log printouts to a maximum of X printouts within Y seconds? Programming server side with java.util.logging, my code has a lot of info, warning, and error ...

4. Java -verbose:gc Performance Implications?    stackoverflow.com

Just wondering if enabling verbose GC would have any effect on the performance of an application. My guess is no not really. I know that enabling verbose GC can output a fair ...

5. How do you calculate log base 2 in Java for integers?    stackoverflow.com

I use following function to calculate log base 2 for integers:

public static int log2(int n){
    if(n <= 0) throw new IllegalArgumentException();
    return 31 - Integer.numberOfLeadingZeros(n);
}

6. What versions of java are slow for gc logging?    stackoverflow.com

I've been told by my company's support team that some versions of java have a significant performance impact when we turn on -verbose:gc. However I can't figure out if this ...

7. GC log question    stackoverflow.com

What is the meaning of following (bold) in GC log:

81296.997: [GC 7431462K->6692307K(8283776K), 1.0975224 secs]
82337.956: [GC 7531219K->6800788K(8283776K), 1.1563326 secs]
83338.712: [GC 7639700K->6898225K(8283776K), 1.0868988 secs]
...

8. How to evaluate the performance of a logger?    stackoverflow.com

I'm doing a project about improving the performance of logs (specifically, log4j) in a Java framework. Now I have two loggers reading from a source and dumping the same logging information ...

9. Logging Framework considerations    stackoverflow.com

I am designing a server for logging. The business logic for this application is written in multiple languages (C++ & Java for now, but other languages might be added to ...

10. Java on Windows needs to log CPU load and similar OS specific performance information    stackoverflow.com

There is a Java library running on windows machines that needs to log information about the OS like CPU load, memory occupied by the JVM etc. which I'm quite sure Java ...

11. Replaying logs ? Opensource/proprietary tools?    stackoverflow.com

Is there any tool that can be used to replay logs ? Hopefully, it can be configured requires less work or at-least less work after initial configuration to adapt to the logs is ...

12. How to measure or log Application Performance    forums.oracle.com

Hi, I've completed developing my Java application and now I would like to measure it's performance in terms of CPU Utilization, Execution Time, and Network Utilization. Are there any programs out there which I can use to log the CPU and Network Utilization over a period of say 10 minutes (scheduled to run at a certain time)? Thanks