Memory Management https://deepu.tech/memory-management-in-jvm/

Memory Leakage . https://stackify.com/memory-leaks-java/ https://mkyong.com/java/java-blockingqueue-examples/ https://javarevisited.blogspot.com/2013/02/concurrenthashmap-in-java-example-tutorial-working.html https://javahungry.blogspot.com/2015/07/difference-between-arraylist-and-copyonwritearraylist-with-example.html https://crunchify.com/copyonwritearraylist-vs-arraylist-in-java-comparison-and-example/

https://crunchify.com/how-to-hit-your-restful-web-service-using-jmeter-perform-a-simple-load-test/ https://winterbe.com/posts/2015/05/22/java8-concurrency-tutorial-atomic-concurrent-map-examples/

https://stackify.com/java-thread-pools/ https://www.callicoder.com/java-locks-and-atomic-variables-tutorial/

https://www.callicoder.com/java-priority-queue/

https://www.callicoder.com/java-executor-service-and-thread-pool-tutorial/

https://programminghistorian.org/en/lessons/creating-apis-with-python-and-flask

https://www.studytonight.com/post/load-balancing-spring-boot-microservices-using-netflixs-ribbon#

https://www.guru99.com/jmeter-performance-testing.html

https://gearheart.io/blog/9-best-strategies-improve-web-application-performance/

https://www.capitalone.com/tech/software-engineering/10-microservices-best-practices/

https://jstobigdata.com/architecture/the-api-gateway-pattern-in-microservices/ https://www.evoketechnologies.com/blog/code-review-checklist-perform-effective-code-reviews/ https://springframework.guru/using-graphql-in-a-spring-boot-application/

https://developer.ibm.com/tutorials/getting-started-with-microservices-using-spring-boot-and-cloudant/

####################################### Thread , Runnable ,blocking queue Concurrent HashMap , CopyOnWriteArrayLIst , Lock Interface , ThreadPool , Atomic , Executors , Callable , Future , Semaphore , CountDownLatch , Class Level /Object Level Lock , Priority Que ,Fail Fast and Fail Safe Collection