heap-memory

This is a question that's been nagging me for some time. I always thought that C++ should have been designed so that the "delete" operator (without brackets) works even with the "new[]" operator. In my opinion, writing this: int* p = new int; should be equivalent to allocating an array of 1 element: int* p = new int[1]; If this was true, the "delete" operator could always be deleting arrays, and we wouldn't need the "delete[]" operator. Is there any reason why the "delete[]" operator was introduced in C++? The only reason I can think of is that allocating arrays has a small memory footprint

As of raising this question, Docker looks to be new enough to not have answers to this question on the net. The only place I found is this article in which the author is saying it is hard, and that's it. jbarrueta I agree that it depends on what container you're using. If you are using the official Tomcat image , it looks like it's simple enough, you will need to pass the JAVA_OPTS environment variable with your heap settings: docker run --rm -e JAVA_OPTS='-Xmx1g' tomcat See How to set JVM parameters? Note that in a docker-compose.yml file - you'll need to leave out the double-quotes:

I am trying to deploy a Spring Boot powered web app to production. The app is built with Spring Boot 1.0.1 and has the default Tomcat 7 embedded as application server. I want to allocate larger memory to the app when start the app with java -jar myapp.jar command line. Should I use JVM parameter such as -Xms -Xmx or use environment variable such as JAVA_OPTS ? I have tried to look for the answer in documentation or google it, but did not get answer. Can anyone give some hints? Just use whatever normal mechanism you would to set up the JVM. Docs are available on the command line: $ java -X ...

This question already has an answer here: how to increase java heap memory permanently? 4 answers I want to set Java heap size permanently and don't want to run every jar file with options. I use Windows and Java 1.7. Setup JAVA_OPTS as a system variable with the following content: JAVA_OPTS="-Xms256m -Xmx512m" After that in a command prompt run the following commands: SET JAVA_OPTS="-Xms256m -Xmx512m" This can be explained as follows: allocate at minimum 256MBs of heap allocate at maximum 512MBs of heap These values should be changed according to application requirements. EDIT: You can also