Maintaining partitioned tables in MySQL can be tedious. In a reporting database that uses monthly date partitions, I've found that I can simplify many frequent partition operations using the common_schema QueryScript language. Below I will describe two specific examples.

Removing old data

I like to keep a 2-3 month window of data in some of my reporting tables. In order to maintain that window I periodically purge data more than 3 months old using the TRUNCATE PARTITION command. Since I want to apply the same purge logic to all tables matching a consistent naming pattern, I can use the common_schema …

This blog examines MySQL 5.7’s primary key lookup results, and determines if MySQL 5.7 is really faster than its early versions.

MySQL 5.7 was released some time ago, and now that the dust has settled it’s a good time to review its performance improvements.

I’m not doing this just to satisfy my own curiosity! Many customers still running MySQL 5.6 (or even MySQL 5.5) often ask “How much performance gain we can expect by switching to 5.7? Or will it actually be a performance hit, especially after Peter’s report here: https://www.percona.com/blog/2013/02/18/is-mysql-5-6-slower-than-mysql-5-5/?”

To determine the answer, we’ll look at some …

This Log Buffer Edition covers weekly round up of blog posts from Oracle, SQL Server and MySQL.

Oracle:

The Universal Theme introduced with APEX 5 is immensely good looking and comes with a powerful Theme Roller to customize it.

The implementation of Ksplice has been greatly simplified. Now you just need to register your system(s) with Unbreakable Linux Network (ULN), subscribe to the appropriate Ksplice channel, use the yum command to install the uptrack package, and perform any custom configuration. Your systems will be automatically updated with the latest kernel and user space patches.

Every …

In this post i want to show you how to take database backup using Laravel backup package this package will provide command to take backup from your live server and that command you can use in crontab file on server that way you can get backup daily on every hourly etc as you want Database backup

In a previous post, we looked into load balancing for PHP apps and how to configure read-write splitting on MySQL Replication setups. The native PHP MySQL driver (php-mysqlnd_ms) would perform read/write splits, and the MySQL connections would be made on one of the two listeners of HAProxy.

In this post, we’ll play around with Java, Connector/J, MySQL Replication and HAProxy. One important thing to note is that, unlike php-mysqlnd_ms, Connector/J is aware of MySQL Replication but it does not automatically perform read-write splitting. We have to instruct the query statement in the code of our Java application to establish a so-called read operation, using a JDBC connection object as read-only. Then, the driver will redirect the query to one of the healthy slaves as defined in the JDBC connection …

When your database undergoes a restart, whether it's a clean reboot or a crash, it will typically create two negative effects your application will have to face: blackout (downtime) and brownout (period of degraded performance after startup).

In my previous post, I described how Aurora makes downtime less stressful for you, now it's time to investigate yet another feature that should come in handy in mission-critical environments: the survivable page cache.

Introduction As usual, let's throw in a tiny bit of theory before looking at the demonstrations.
The InnoDB Buffer Pool is an in-memory area for caching data and index pages. That said, buffer pool can also be called a "page cache". Both terms mean …

Sometimes we have apis implemented in our application and there are different levels at which these can be tested.

1. Unit tested at model level to check the logic is working fine
2. Tested at API call level to ascertain whether all the apis as expected are working and are returning data as expected.


Today, we will be learning how to test APIs in CodeIgniter 2.x version using phpunit and Guzzle Http client.

Basically Guzzle Http client is a client used to make http client requests.

Ref: https://github.com/guzzle/guzzle

"Guzzle is a PHP HTTP client that makes it easy to send HTTP …

nowdays sublime is a very popular text edir in the developing field sublime text editor is provide lots of packages like code formatter php syntax etc sublime is also provide snippet snippet is very intrsting point because if you need to write same code lots of time than you can create shortcut

However you want the scrolling process to have animated effect you have to follow bellow example in this post you can add button for scrolling top with animate effect Most of website you can see with one button left side or right side for scrolling top of the page so if you want to create on yo

This blogpost extends last one. In the last blogpost, we had a look into Docker Network and how it makes the communication between the containers (over multiple hosts) easier. Of course we used Galera for that :)

In this blogpost we are going to use Docker Swarm to bootstrap a Galera Cluster.

Why using Docker Swarm?

Docker Swarm is (simplified) a proxy. So we've got one accesspoint to manage multiple hosts. (The swarm manage service will run on 172.17.152.11:2376). We also use Docker Swarm to abstract from the nodes. As we want the cluster to be running but we don't want to define explicitly where to run them. (Think about a 3-node-cluster on Docker Swarm with 100 nodes.)

Let us point the local docker to Docker Swarm:

export DOCKER_HOST=tcp://172.17.152.11:2376

We still got …