Batch processing in hibernate

A lot of good advices are here https://docs.jboss.org/hibernate/orm/3.3/reference/en/html/batch.html

HikariCP connection pool

"HikariCP - here is nothing faster. There is nothing more correct. HikariCP is a “zero-overhead” production-quality connection pool. " - sounds great) Need to check it

 http://brettwooldridge.github.io/HikariCP/

Java: MongoDB simple example

MongoDB - is an open source document-oriented NoSQL database system. Next I will create simple servlet example that's uses MongoDB. 

C3P0 ConnectionPool: How To configure

C3P0 - is a connection pool,  connection pool is a cache of database connections maintained, so that the connections can be reused when future requests to the database are required. 

The main question is how to cofigure it, because default values are not perfect. First of all I found oficial doc with description of the values. Next I found this one C3P0 ConnectionPool Configuration Rules of Thumb. After some performance testing of my application, I can confirm that configuring like in this article, can greatly increase your performance, in my case it was about twice. So bellow text of this article -  "

Auto Generate Database(ER) Diagram MySql

To create ER diagram from db schema you can use SchemaSpy.

Java: Loading data from file into a Oracle database

It's possible to do using Sql Loader.SQL*Loader is a bulk loader utility used for moving data from external files into the Oracle database.

Java: Using SQLite

SQLite - is embedded relational database management system.In other words you can use sql database without server.

Java: JDBC basics

JDBC is an API for the Java programming language that defines how a client may access a database. It provides methods for querying and updating data in a database.