MySQL is extensive and has lots of areas to optimize and tweak for the desired performance. Some changes can be performed dynamically, others require a server restart. It is pretty common to find a MySQL installation with a default configuration, although the latter may not be appropriate per se from your workload and setup.

Here are the key areas in MySQL which I have taken from different expert sources in the MySQL world, as well as our own experiences here at Severalnines. This blog would serve as your cheat sheet to tune performance and make your MySQL great again :-)

Let’s take a look on these by outlining the key areas in …

Amazon Aurora with MySQL Compatibility comes in three editions which, at the time of writing, have quite a few differences around the features that they support.  Make sure you don’t assume the newer Aurora 2.x supports everything in Aurora 1.x. On the contrary, right now Aurora 1.x (MySQL 5.6 based) supports most Aurora features.  The serverless option was launched for this version, and it’s not based on the latest MySQL 5.7.  However, the serverless option, too, has its own set of limitations

I found a concise comparison of what is available in which Amazon Aurora edition hard to come by so I’ve created one.  The table was compiled based mostly on documentation research, so if you spot some mistakes please let me know and I’ll make a correction.

Please keep in mind, this is expected to …

Percona announces the release of Percona XtraDB Cluster 5.6.42-28.30 (PXC) on January 4, 2019. Binaries are available from the downloads section or our software repositories.

Percona XtraDB Cluster 5.6.42-28.30 is now the current release, based on the following:

• Percona Server 5.6.42
• Codership WSREP API release 5.6.42
• Codership Galera library 3.25

All Percona software is open-source and free.

Fixed …

Percona is glad to announce the release of Percona XtraDB Cluster 5.7.24-31.33 (PXC) on January 4, 2019. Binaries are available from the downloads section or from our software repositories.

Percona XtraDB Cluster 5.7.24-31.33 is now the current release, based on the following:

• Percona Server for MySQL 5.7.24
• Galera Replication library 3.25
• Galera/Codership WSREP API Release 5.7.24

Deprecated

The following variables are deprecated starting from this release:

• …

Recently, I encountered a situation where MySQL gave error messages that I had never seen before:

2018-12-12T14:36:45.571440Z 0 [ERROR] Error log throttle: 150 'Can't create thread to handle new connection' error(s) suppressed
2018-12-12T14:36:45.571456Z 0 [ERROR] Can't create thread to handle new connection(errno= 11)
2018-12-12T14:37:47.748575Z 0 [ERROR] Error log throttle: 940 'Can't create thread to handle new connection' error(s) suppressed
2018-12-12T14:37:47.748595Z 0 [ERROR] Can't create thread to handle new connection(errno= 11)

I was thinking maybe we hit some

ulimit

 limitations or similar, but all the usual suspects were set high enough, and we were not even close to them.

After googling and discussing with the customer, I found they had had similar issues in the past, and I learned something new. Actually it is relatively new, as it has been around for a few years but is not that well known. It is …

This is my first post in 2019, and Im starting with a MySQL solution. In MySQL world, implementing a better backup strategy to meet all of your requirement is still a challenging thing. The complexity depends on your RPO and RTO. Percona has many tools to help DBAs in many scenarios. Xtrabackup is one of …

The post Automation Script For Percona Xtrabackup FULL/Incremental appeared first on SQLgossip.

Image Source: DigitalOcean

This is my first post in 2019, and Im starting with a MySQL solution. In MySQL world, implementing a better backup strategy to meet all of your requirement is still a challenging thing. The complexity depends on your RPO and RTO. Percona has many tools to help DBAs in many scenarios. [Xtrabackup](https://www.percona.com/software/mysql-database/percona-xtrabackup) is one of the best backup tools to perform a better backup on TeraBytes size of databases. Also, another great feature is it supports Incremental and Differential backup.

There are couple of tools which is available in MySQL world, But due to some restrictions we can’t achieve what we are expecting.

#1 mysqldump

This is a widely used backup tool and most of the DBAs are trust this. This comes with …

I have already explained about Express.js tutorial and creating simple app with it. As promised in that post i thought to come up with another Express.js tutorial with MySQL. But again, explaining just the concept about library is not enough and this is not even why codeforgeek exits. So i thought to come up with […]

While managing multi servers in a single place, we need a secure authentication method which includes SSH Keys, Passwords and etc. RunDeck is having a great feature called Key Storage. RunDeck Key Storage is a secure and encrypted place for storing confidential contents. Its using HashiCorp Vault for this. Its already enabled by default. So …

The post RunDeck Series 5 – Encrypt Key Files And Passwords In RunDeck appeared first on SQLgossip.

While managing multi servers in a single place, we need a secure authentication method which includes SSH Keys, Passwords and etc. RunDeck is having a great feature called Key Storage. RunDeck Key Storage is a secure and encrypted place for storing confidential contents. Its using HashiCorp Vault for this. Its already enabled by default. So we just upload our keys and creating encrypted passwords.

Encrypting PEM Files:

• Click the Gear Icon and Go to Key Storage.

• Then you can select that you want to store Key files or Password.

• Key Type: Public Key
• Then you can upload your Public Key file or just copy the file contents and paste it.
• Storage path: Keys/ is the default storage location for all encrypted files. But we can make folders inside the keys/. (Eg: …