Just wanted to document the steps taken in a specific scenario. There are plenty of references covering the different parts (feel free to Google if you don't believe me).
Scenario:
Problematic Java application running on a Linux server with a large heap (~16 GB).
My devices, Windows Laptop/Desktop with a limited number of RAM.
Goal:
Take a heap dump and analyze with Eclipse Memory Analyzer.
| *.ip | |
| *.log |
| Roll your own dynamic DNS service using Route53 |
| #!/usr/bin/env bash | |
| # Kafka utilises JMX to provide an access to some useful data | |
| # This script uses command line JMX client to retrieve those metrics from a Kafka broker | |
| # and publish them to AWS Cloudwatch | |
| # JMX Client: http://crawler.archive.org/cmdline-jmxclient/downloads.html | |
| # Runtime dependencies: Java, AWS CLI, IAM role attached to the instance with permissions | |
| # to put Cloudwatch metrics |
| #include <memory> | |
| #include <unordered_map> | |
| #include <functional> | |
| #include <mutex> | |
| #include <glog/logging.h> | |
| /** | |
| * Key-Value Cache Helper. | |
| * | |
| * It store a object instance global. User can invoke get method by key and a |
| // How to use: | |
| // 1. Go to a page of GitHub Wiki with Mac Chrome. | |
| // 2. Copy this script to the clipboard. | |
| // 3. Hit Cmd-Opt-J to open Web Console. | |
| // 4. Hit Cmd-V to paste this script. | |
| // 5. Hit Enter to run script. | |
| // 6. If you are not in edit mode, click the "Copy ToC" button shown in the page. | |
| // Then ToC is copied to the clipboard, so paste the TOC from the clipboard. | |
| var container = document.querySelector('.markdown-body'); |
| import akka.actor.{ Actor, ActorRef, Props, ActorSystem } | |
| case class ProcessStringMsg(string: String) | |
| case class StringProcessedMsg(words: Integer) | |
| class StringCounterActor extends Actor { | |
| def receive = { | |
| case ProcessStringMsg(string) => { | |
| val wordsInLine = string.split(" ").length | |
| sender ! StringProcessedMsg(wordsInLine) |
| da< (or) da( (or) da{ // delete the block including <,(,{ and >,),} rsply | |
| di< (or) di( (or) di{ // simillarly, but excluing <,(,{ and >,),} rsply | |
| yi< (or) yi( (or) yi{ // yanks simillarly. Simillarly for ciw, viw, etc | |
| df<Space> // delete from current char including the next space | |
| daw // delete current word including the next space | |
| diq // delete current word excluding the next space | |
| yiw // yank current word excluding the next space | |
| yaw // yank current word including the next space |
