Planet MySQL Planet MySQL: Meta Deutsch Español Français Italiano 日本語 Русский Português 中文
10 Newer Entries Showing entries 61 to 70 of 210 10 Older Entries

Displaying posts with tag: MySQL 5.6 (reset)

Fun with Bugs #28 - regression bugs in MySQL 5.6
+0 Vote Up -0Vote Down

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 …



  [Read more...]
MySQL 5.6 system variables in the MariaDB 10 server
+4 Vote Up -0Vote Down

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 …

  [Read more...]
How to recover an orphaned .ibd file with MySQL 5.6
+0 Vote Up -0Vote Down

A few years ago Yves Trudeau and Aleksandr Kuzminsky wrote posts about different ways for recovering orphaned .ibd files:

  [Read more...]
Teaser on my upcoming Percona Live London 2013 session
+0 Vote Up -0Vote Down

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 …

  [Read more...]
My Favorite Hidden Docs Page
Employee +2 Vote Up -0Vote Down

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, …

  [Read more...]
InnoDB adaptive flushing in MySQL 5.6: checkpoint age and io capacity
+0 Vote Up -0Vote Down

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 …



  [Read more...]
MySQL 5.6 New Replication Features: Webinar followup Q&A
+0 Vote Up -0Vote Down

I want to thank all attendees of my webinar, “MySQL 5.6 New Replication Features: Benefits, Challenges and Limitations“. We had questions that I didn’t have the time to answer:

Q: If I run on Amazon’s RDS, do I need to worry about enabling crash-safe slaves, or is that already in place?

A: Crash-safe …

  [Read more...]
Using the PAM authentication plugin
+2 Vote Up -0Vote Down

The procedure for using the PAM authentication plugin as documented doesn't work flawlessly on Ubuntu.

So here is how it works on Ubuntu (and probably also on other Debian based systems).

Please note that the PAM authentication plugin is an enterprise feature.

1. Make sure the plugin is loaded

This can be done by adding the following to the mysqld section of my.cnf (Don't forget to restart). You could also use INSTALL PLUGIN to load it without restart.









  [Read more...]
Recalculating InnoDB Persistent Statistics - a Story of the Bug Report
+0 Vote Up -0Vote Down

One of the first posts in this blog was about reporting MySQL bugs "properly", in a way that maximizes chances for it to be processed really soon. I had written the following there:
"Ideally, you should provide a complete test case and/or instructions that any reader can use to reproduce your problem"Indeed, if one can just copy/paste something to mysql command line client or run some file attached to see the problem, chances are high for the bug to be processed really soon. We all like to get low hanging fruits from time to …

  [Read more...]
time for standards 2
+2 Vote Up -0Vote Down

I was a bit wrong in my previous post. MySQL 5.6 does allow you to supply a fsp with CURRENT_TIMESTAMP (thanks Roy).

mysql> SELECT CURRENT_TIMESTAMP,CURRENT_TIMESTAMP(6);
+---------------------+----------------------------+
| CURRENT_TIMESTAMP | CURRENT_TIMESTAMP(6) |
+---------------------+----------------------------+
| 2013-10-27 10:38:59 | 2013-10-27 10:38:59.182530 |
+---------------------+----------------------------+
1 row in set (0.00 sec)


It however feels a bit weird to me as the …










  [Read more...]
10 Newer Entries Showing entries 61 to 70 of 210 10 Older Entries

Planet MySQL © 1995, 2015, Oracle Corporation and/or its affiliates   Legal Policies | Your Privacy Rights | Terms of Use

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.