SEARCH KEYWORD -- Memory analyzer tool


  Use of Erlang in WhatsApp

After many years, people are still discussing whether Erlang is a small language. People have all sorts of doubt about it, but with the appearance of WhatsApp, we may change our mind. What is WhatsApp, from its official website: WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. The more funny thing is the main developer of WhatsApp Rick Reed worked in Yahoo and SGI before he joined WhatsApp and he didn't have any know...

   Erlang,WhatsApp,Architecture     2013-06-16 03:03:46

  golangci-lint to enable comment check for exported functions

golangci-lint is a command line tool which aggregates a list of different go linters to check whether the source code is in correct condition from different aspects. It is built to run during the CI pipeline so that there is no obvious coding issues before compiling and building the program. It is easy to run it with just below command $ golangci-lint run -v INFO [config_reader] Config search paths: [./ /Users /] INFO [config_reader] Used config file .golangci.yml INFO [lintersdb] Active 10 li...

   EXPORTED COMMENT,GOLINT,REVIVE,GOLANGCI-LINT,GOLANG     2022-04-15 20:21:34

  Using keytool to create certificate chain

JDK provides a command line tool -- keytool to handle key and certificate generation. This tool has a set of options which can be used to generate keys, create certificates, import keys, install certificate and export certificates etc. In this tutorial, we will show how to create certificate chain using keytool. If you want to understand how to create certificate chain programmably, please refer to Generate certificate in Java -- Certificate chain. To begin, we first generate a key pair whi...

   JAVA,KEYTOOL,CERTIFICATE CHAIN,CERTIFICATE     2015-12-17 07:09:33

  MaxHeapSize in JVM

MaxHeapSize is an option which is to set the JVM maximum heap size can be allocated. We can specify the MaxHeapSize as VM argument when we run the program by setting -XX:MaxHeapSize=, here can be 2M, 20M, 200M etc. We can also view the current MaxHeapSize set by setting different JVM options. To view the MaxHeapSize, we can use two JVM options : -XX:+PrintFlagsFinal and -XX:+PrintCommandLineFlags. Below is one example when running -XX:+PrintFlagsFinal: bool MaxFDLimit ...

   JVM,MaxHeapSize,Alignment     2014-06-17 07:01:50

  How to reset root password in MySQL 8

The user password in MySQL is stored in the user table, the password reset is actually to change the value of record in this table. To change the password in case the password is forgotten, the idea is to bypass the authentication of MySQL and get into the system and update the record password value with SQL command. In MySQL 5, one can start MySQL service with --skip-grant-tables option, this option will tell the service to skip loading the grant tables when starting, hence the root user can lo...

   MYSQL,PASSWORD,MYSQL 8     2018-12-24 21:27:13

  How does MySQL handle DROP TABLE

A few days ago, when executing DROP TABLE in MySQL, all processes including DDL and DML were hung until DROP TABLE was completed. I am confused about this phenomenon. I have reviewed the source codes of MySQL to check how MySQL internally handle DROP TABLE. When user trigger DROP TABLE command: ########################MySQL SERVER drop table######################## /* Sql_table.cc  delete (drop) tables. */bool mysql_rm_table( )   /*   Execute the drop of a normal or temporary...

   MySQL,DROP TABLE     2012-09-24 11:34:05

  The world's first HTML5 SIP client

This is the world's first open source HTML5 SIP client (May 12, 2012) entirely written in javascript for integration in social networks (FaceBook, Twitter, Google+), online games, e-commerce sites... No extension, plugin or gateway is needed. The media stack rely on WebRTC. The client can be used to connect to any SIP or IMS network from your preferred browser to make and receive audio/video calls and instant messages. The protocol parsers (SIP, SDP...) are highly optimized using Ragel loo...

   HTML5,SIP,CLient,Google     2012-05-21 06:18:34

  What's wrong with us in Mobile Era?

Every day when I surf the Internet, I find much news about new smartphones and Android, iOS apps. Also I can find many people use iPhones and other smartphones with Android OS. Apparently we are now in Mobile era. People can find tons of news that says how Mobile has changed our life, made our life simpler and how easy we can know the world with mobile technology. Yes, it's true, now we only need to press a button, we can know what happens in USA which is thousands kilometres away from us. We ca...

   Mobile,Cold,Stay away,Smartphone     2012-01-07 12:10:35

  HeartBleed: Inside the heart, what happens to a normal WEB user?

To be brief, our email, IM, facebook etc. are at the risk, so try to minimize the access in these few days. Especially we should try to avoid log into our internet-banking, because we may expose our user id and password. Also later when the service providers fix the bug, we would better to change a new password for all the web accounts that are important to us. Here comes the technical explanation. You might notice before that a lot of websites use URL starting with "https". For example, https:/...

   HeartBleed,Analysis     2014-04-09 22:41:43

  Why does Symbian collapse?

On 24th January, Nokia announces a disappointing news that they would give up Symbian. The 808 PureView released last year will be its last Symbian model.  Symbian was born in 1998, it was supported by the then three mobile giants : Sony Ericson, Motorola and Nokia after its birth, later Samsung and LG also joined the Symbian camp. In 2000, the first Symbian model in the world Ericoson R380 was released, in 20006, there were over 100 million Symbian handphones on the market. But in 2007, t...

   Nokia, Symbian, Collapse, Analysis     2013-01-28 03:06:09

RECENT