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Displaying posts with tag: innodb (reset)
Percona Server for MySQL 5.7.17-12 is Now Available

Percona announces the GA release of Percona Server for MySQL 5.7.17-12 on March 24, 2017. Download the latest version from the Percona web site or the Percona Software Repositories. You can also run Docker containers from the images in the Docker Hub repository.

Based on MySQL 5.7.17, including all the bug fixes in it, Percona Server for MySQL 5.7.17-12 is the current GA release in the Percona Server for MySQL 5.7 series. Percona’s …

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Fun with Bugs #50 - On Bugs Tagged as "missing manual"

Back in January 2014, some time after many nice people kindly asked me to shut up stop writing about MySQL bugs on Facebook several times per day, I decided to start reading the fine MySQL Manual more carefully than before and report not only typos there, but also any topic or detail not properly explained. Usually these reports, tagged as "missing manual", were the result of careful study of the documentation based on real user question or customer issue. So, most of these reports came from real life, and missing information badly affected poor MySQL users.

Today, for this issue #50 in my series of posts about MySQL bugs, I decided to list and …

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Testing MyRocks vs InnoDB Performance Using sysbench 1.x oltp_point_select.lua

It seems MyRocks is going to become a hot topic in April 2017. Previously (here and there) I tried to compare its performance and scalability vs InnoDB from MySQL 5.7.17 using test case from famous bug #68079. It's an interesting case that took a lot of efforts from Oracle to make InnoDB scale properly, and InnoDB (on my QuadCore box at least, others reported different results on other hardware in comments) still outperformed MyRocks. But maybe it's corner case that is not a big deal in general?

Earlier this month I decided to give MyRocks another chance and try it with "industry-standard" benchmarks, like those provided by

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Better InnoDB Crash Recovery in MariaDB 10.1

Recently, I had to go through crash recovery of a large MariaDB 10.1.21 instance.  After starting MariaDB, I started tailing the error logs expecting to wait many minutes while InnoDB was scanning ibd files.  I was surprised (and actually delighted) with this:

[...] [...]:34:36 [...] [Note] InnoDB: Reading tablespace information from the .ibd files... [...]:34:53 [...] [Note] InnoDB: Processed

Optimistic Incremental Backup

MySQL Enterprise Backup Team is pleased to announce major improvements in incremental backup performance starting with release 4.1.

Introduction

The current incremental backup algorithm scans all the tables to gather changed pages even if very few tables are modified since the previous backup and thus results in a 'full-scan' incremental backup. This may result in increment backups requiring the same amount of time as full backup because it scans all the tables. The new algorithm aims to eliminate this extra time.

The new algorithm scans only those tables that have been modified since the previous backup. This algorithm relies on modification time, which is similar to an earlier improvement made for full backup. That full backup algorithm is known as optimistic full backup, hence new improvement is named …

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Open Source Databases on Big Machines: Disk Speed and innodb_io_capacity

In this blog post, I’ll look for the bottleneck that prevented the performance in my previous post from achieving better results.

The powerful machine I used in the tests in my previous post has a comparatively slow disk, and therefore I expected my tests would hit a point when I couldn’t increase performance further due to the disk speed.

Hardware configuration:

Processors: physical = 4, cores = 72, virtual = 144, hyperthreading = yes
Memory: 3.0T
Disk speed: about 3K …

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Percona Server for MySQL 5.7.17-11 is now available

Percona announces the GA release of Percona Server for MySQL 5.7.17-11 on February 3, 2017. Download the latest version from the Percona web site or the Percona Software Repositories.

Based on MySQL 5.7.17, including all the bug fixes in it, Percona Server for MySQL 5.7.17-11 is the current GA release in the Percona Server for MySQL 5.7 series. Percona’s provides completely open-source and free software. Find release details in the …

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Profiling MyRocks with perf: Good Old Bug #68079 Use Case

Almost a year ago I've got really interested in MyRocks and built MySQL from Facebook that provides it from source. Since that time I build it from fresh sources few times per week (as I've described in that post) and once in a while try to work with it and study some details or use cases. Today I'd like to discuss one of them that I've recently studied with perf profiler.

This is not only because I am going to talk about applying profilers to all kinds and forks of MySQL at FOSDEM 2017 MySQL & Friends …

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perf Basics for MySQL Profiling

Oprofile was widely used for MySQL profiling on Linux in the past. But since 2010 and 2.6.31 Linux kernels another profiler, perf, gets increasing popularity. It uses performance counters (CPU hardware registers that count hardware events such as instructions executed) subsystem in Linux. perf is capable of lightweight profiling. It is included in the Linux kernel, under tools/perf (so features available depends on kernel version), and is frequently updated and enhanced.

So, probably perf is the future of profiling on Linux and it makes sense to discuss its basic usage for profiling MySQL servers. For detailed discussions of features provided, numerous examples (not related to MySQL) and links I suggest to read …

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Percona Live Featured Tutorial with Frédéric Descamps — MySQL InnoDB Cluster & Group Replication in a Nutshell: Hands-On Tutorial

Welcome to another post in the series of Percona Live featured tutorial speakers blogs! In these blogs, we’ll highlight some of the tutorial speakers that will be at this year’s Percona Live conference. We’ll also discuss how these tutorials can help you improve your database environment. Make sure to read to the end to get a special Percona Live 2017 registration bonus!

In this Percona Live featured tutorial, we’ll meet Frédéric Descamps, MySQL Community Manager at Oracle. Frédéric is probably better known in the community as “LeFred” (Twitter: @lefred)! His tutorial is …

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