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Displaying posts with tag: MySQL 5.6 (reset)

Percona Replication Manager (PRM) now supporting 5.6 GTID
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Over the last few days, I integrated the MySQL 5.6 GTID version of the Percona Replication Manager (PRM) work of Frédéric Descamps, a colleague at Percona. The agent supports the GTID replication mode of MySQL 5.6 and if the master suffers a hard crash, it picks the slave having applied the highest transaction ID from the dead master. Given the nature of GTID-based replication, that causes all the other slaves to resync appropriately to their new master which is pretty cool and must yet be matched by the regular PRM agent.

For now, it is part of a separate agent, …

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MySQL in Oracle Critical Patch Update Advisory January 2014
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Oracle has released the Critical Patch Update (CPU) advisory for January 2014.

The affected MySQL products are:

  • Oracle MySQL Enterprise Monitor, versions 2.3, 3.0 
  • Oracle MySQL Server, versions 5.1, 5.5, 5.6

So this means that you should consider updating MySQL. For MySQL Enterprise the updates should be available on My Oracle Support and for the Community version the new versions are on the …




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Multiple column index vs multiple indexes with MySQL 5.6
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A question often comes when talking about indexing: should we use multiple column indexes or multiple indexes on single columns? Peter Zaitsev wrote about it back in 2008 and the conclusion then was that a multiple column index is most often the best solution. But with all the recent optimizer improvements, is there anything different with MySQL 5.6?

Setup

For this test, we will use these 2 tables (same structure as in Peter’s post):

CREATE TABLE t1000merge (
  id int not …
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It can be a bright 2014
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In many parts of the MySQL world, whether you have users, developers or administrators of MySQL, the season holidays are for family, relax, prayers, travel, or they are simply a moment where you can enjoy what you like or care most about.

For me, this time is dedicated to my family, but also to deeper thoughts around the strategies to adopt in short and long term. My work nowadays, as the work of many others, is ruled by quick decisions, by the "time to market” - whatever “market" means in a specific context. Decisions must be made in meetings that are time-boxed in one hour or even less. In the end, you accumulate so much work and high …


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Fun with Bugs #28 - regression bugs in MySQL 5.6
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2013 was a great year for MySQL Community. New MySQL 5.6 GA release with its increased throughput, scalability and new features as well as more interaction and cooperation with MySQL Community from Oracle side brought us a lot of new perspectives and good feelings over the year.

Unfortunately new MySQL 5.6 GA release also reminded about old and well known problem with new MySQL versions. They all introduce new regression bugs. MySQL 5.6 had not become an exception.

Note that according to good old tradition (that I hope will be …



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MySQL 5.6 system variables in the MariaDB 10 server
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Since MariaDB aims to be a compatible/drop-in replacement to MySQL, its crucial that in 10.0 we support all the 5.6 options/system variables, else we have to clearly document them in the Knowledgebase article MariaDB versus MySQL – Compatibility.

To this extent, Sergey Vojtovich (svoj) has created MDEV-5277 as a tracker. There is also plenty of …

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How to recover an orphaned .ibd file with MySQL 5.6
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A few years ago Yves Trudeau and Aleksandr Kuzminsky wrote posts about different ways for recovering orphaned .ibd files:

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Teaser on my upcoming Percona Live London 2013 session
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As you probably know already, I have a session on PERFORMANCE_SCHEMA at the conference, scheduled at 12 November 4:00pm - 4:50pm @ Orchard 1. Presentation is mostly ready, but I had not decided yet when to publish it. In the meantime, for those really interested, here is a teaser.

Below I list one link for each slide (in order of presentation) having more than one of them mentioned or listed in my notes. Now try to guess what I am going to say there and why. Note that it's not a tutorial (my half a day …

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My Favorite Hidden Docs Page
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There’s a lot to love about the MySQL product documentation – a lot of hard work from a number of very talented Oracle staff goes into it (not to mention the helpful suggestions and feedback from the community).  There is, however, one page I find myself coming back to again and again, despite the fact that it’s somewhat hard to find.  This is the MySQL Server options/variable reference page.  It’s a helpful table that lists every MySQL Server option or variable, what version it was introduced or deprecated in, …

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InnoDB adaptive flushing in MySQL 5.6: checkpoint age and io capacity
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In MySQL 5.6 InnoDB has a dedicated thread (page_cleaner) that’s responsible for performing flushing operations. Page_cleaner performs flushing of the dirty pages from the buffer pool based on two factors:
- access pattern  -  the least recently used pages will be flushed by LRU flusher from LRU_list when buffer pool has no free pages anymore;
- age – the oldest modified non-flushed pages are part of flush_list structure and will be flushed by flush_list flusher based on several heuristics.

There is a good …



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10 Newer Entries Showing entries 31 to 40 of 184 10 Older Entries

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