One of the most exciting features shipped in the Percona Monitoring and Management 1.3.0 (PMM) release is support for MyRocks metrics via a new Metrics Monitor dashboard titled MySQL MyRocks Metrics. The support in PMM follows the recent Percona Server for MySQL release 5.7.19 from September 6, where Percona delivered an EXPERIMENTAL version of MyRocks for non-Production usage.

The MyRocks storage engine from Facebook is based on RocksDB, a persistent key-value store for fast storage environments. MyRocks is optimized for fast storage and combines outstanding space and write efficiency with acceptable read performance. As a result, …

Percona announces the release of Percona Monitoring and Management 1.3.0 on September 26, 2017.

Percona Monitoring and Management 1.3.0 introduces basic support for the MyRocks storage engine. There is a special dashboard in Metrics Monitor that presents the essential metrics of MyRocks as separate graphs. Also, Metrics Monitor graphs now feature on-demand descriptions that remain visible as long as hover over them.

For example, this graph helps you visualize MyRocks database operations of Next and Seek attributes:

There are many improvements to QAN (Query Analytics) both in the user interface design and in …

Welcome to the first day of the Percona Live Open Source Database Conference Europe 2017: Tutorials day! Technically the first day of the conference, this day focused on provided hands-on tutorials for people interested in learning directly how to use open source tools and technologies.

Today attendees went to training sessions taught by open source database experts and got first-hand experience configuring, working with, and experimenting with various open source technologies and software.

The first full day (which includes opening keynote speakers and breakout sessions) starts Tuesday 9/26 at 9:15 am.

Some of the tutorial topics covered today were:

…

In this blog post, I will demonstrate how to run and use sysbench histograms.

One of the features of sysbench that I often I see overlooked (and rarely used) is its ability to produce detailed query response time histograms in addition to computing percentile numbers. Looking at histograms together with throughput or latency over time provides many additional insights into query performance.

Here is how you get detailed sysbench histograms and performance over time:

sysbench --rand-type=uniform --report-interval=1 --percentile=99 --time=300 --histogram --mysql-password=sbtest oltp_point_select --table_size=400000000 run

There are a few command line options to consider:

• report-interval=1 – prints out the current performance measurements every second, which helps see if …

Welcome to another post in our series of interview blogs for the upcoming Percona Live Europe 2017 in Dublin. This series highlights a number of talks that will be at the conference and gives a short preview of what attendees can expect to learn from the presenter.

This blog post is with Bernd Erk, CEO of Icinga. His talk is titled Monitoring Open Source Databases with Icinga. Icinga is a popular open source successor of Nagios that checks hosts and services, and notifies you of their statuses. But you also need metrics for performance and growth to deal with your scaling needs. Adding conditional behaviors …

Welcome to another post in our series of interview blogs for the upcoming Percona Live Europe 2017 in Dublin. This series highlights a number of talks that will be at the conference and gives a short preview of what attendees can expect to learn from the presenter.

This blog post is with Daniel Lee, a software developer at Grafana. His tutorial is Visualize Your Data With Grafana. This presentation teaches you how to create dashboards and graphs in Grafana and how to use them to gain insight into the behavior of your systems. In our conversation, we discussed how data visualization could benefit your database …

In this post, we will discuss how to fix cardinality for InnoDB tables manually.

As a support engineer, I often see situations when the cardinality of a table is not correct. When InnoDB calculates the cardinality of an index, it does not scan the full table by default. Instead it looks at random pages, as determined by options innodb_stats_sample_pages, innodb_stats_transient_sample_pages and innodb_stats_persistent_sample_pages, or …

Keeping databases running consistently and continuously is crucial to many organizations. When your site or application fails to load because of problems with your databases, you risk losing revenues—especially a business with a high traffic site which is the main source of revenues. If it happens often enough, you’ll lose not only transactions but customers.

There are many reasons why a database system may be unavailable, or at least not consistently available. It could be straightforward problems with your databases, or it could be hardware limitations. There are several potentially weak components of a database system. It’s important to know where are the potential weak points and to have a clear sense of what’s required to maintain a highly available database system.

If this concept is moderately new to you, it may be overwhelming. However, please understand that it’s achievable and learnable. You can start by focusing …

Keeping databases running consistently and continuously is crucial to many organizations. When your site or application fails to load because of problems with your databases, you risk losing revenues—especially a business with a high traffic site which is the main source of revenues. If it happens often enough, you’ll lose not only transactions but customers.

There are many reasons why a database system may be unavailable, or at least not consistently available. It could be straightforward problems with your databases, or it could be hardware limitations. There are several potentially weak components of a database system. It’s important to know where are the potential weak points and to have a clear sense of what’s required to maintain a highly available database system.

If this concept is moderately new to you, it may be overwhelming. However, please understand that it’s achievable and learnable. You can start by focusing …

MySQL 8.0.1 introduces new features and improvements to replication. The next sections summarize some related to performance.

1. WL#9556 – Writeset-based dependency tracking on the master

Transaction writesets can now be used to evaluate which transactions are independent and can be executed in parallel on the binary log applier on the asynchronous slaves.…