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Is there any profiler or tool (jconsole, jfr, VisualVM, ... ) for the JVM which shows methods along their allocation rate?

I mean, something like this

I wanted to upgrade some things through HomeBrew, but it seems like it broke my Postgres.

I'm on MacOS. I need to be able to run my Postgres again. Deleting without backups isn't much of a problem: this is a local dev setup.

I ran:

• brew update
• brew upgrade

Which output:

I've Linux Mint 20.2 Cinnamon and I tried to install jenkins. Detailed steps for installation is as below:

1. Installing java - installed via apt

We are using RabbitMq with default spring boot configurations. We have a use case in which we want no parallelism for one of the listeners. That is, we want only one thread of the consumer to be running at any given point in time. We want this, because the nature of the use case is such that we want the messages to be consumed in order, thus if there are multiple threads per consumer there can be chances that the messages are processed out of order. Since, we are using the defaults and have not explicitly tweaked the container, we are using the SimpleMessageListenerContainer. By looking at the documentation I tried fixing the number of consumers using concurrency = "1" . The annotation on the target method looks like this @RabbitListener(queues = ["queue-name"], concurrency = "1").

As per the documentation this should have ensured that there is only consumer thread.

{@link org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer * SimpleMessageListenerContainer} if this value is a simple integer, it sets a fixed * number of consumers in the {@code concurrentConsumers} property

I am processing animations taking place in a webpage in a video software. I am currently using Selenium 4 with Chrome and I'd like to achieve a better performance.

I could not find a way to leverage the Page.startScreencast method via Selenium, so my current approach is simply taking periodic screenshots using

I am doing a performance analysis of a Program using VisualVM tool. I was able to check CPU usage and heap usage of the program but couldn't figure out which type of GC (young GC/full GC) is executing currently. Is there anyway to find it using VisualVM or is there any other tool for it?

Suppose I have a method that can take in a parameter is size n (Like an array with size n); is it possible to investigate the CPU Times for the method with varying array sizes in an automated manner using VisualVM's Profiler?

Currently I only know how to investigate a particular running instance, and even if I use a loop to repeat the method with increasing n, VisualVM's profiler can only tell me the accumulative CPU Time. Ideally, I will be able to plot a graph of CPU Time vs n, where n is the size of the parameter I pass into the method. Is this possible with VisualVM?

I am constantly getting images from a local server and I want to show them on the JPanel.

I wrote a code that works for a while without any issue. But after some time (approximately 5 min), I get this error:

I am trying to read the list of modules available in a given Java 9+ installation, given its Java Home, using the method described in How to extract the file jre-9/lib/modules?.

The solution works, but it appears that the resources allocated to read the content of the Java Runtime Image are never freed, causing a memory leak, observable with VisualVM for instance:

How can I fix the memory leak in the following reproduction?