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Comment on Getting MySQL Cluster compiled & Installed by Jesse

Nevermind! Found it.
http://bugs.mysql.com/bug.php?id=62769

Comment on Getting MySQL Cluster compiled & Installed by Jesse

The file ID for the patch is 17637. Do you know the bug number? I’m wondering if it is fixed in 7.3.2

QA and bug fixing for OQGraph

Just mentioning it here because hard work deserves to be recognised and mentioned: Andrew McDonnell is doing an awesomely good job of testing, understanding and fixing bugs in OQGraph... which is no mean feat because the core of the code is based on the Boost Graph Library which isn't a trivial C++ library.

Relevance of regression test failures on exotic platforms

Back in my days at MySQL we had a lot of issues with test failures. We had lots of platforms, and would try to run and maintain our regression test suite on all of them. I remember spending days investigating issues on some obscure OS (Mac OS, mainly, Windows was taken care of) or hardware (little-endian, mainly) .
With Tarantool, we never got to do that. We do run buidls on lots of platforms, and someone always screams when they break, since we only run builds on platforms which are in actual use. And they do break, so it's a lot of hassle. But we haven't had time to maintain the regression tests on some of these platforms. Ugly? Yes. Yet we know which systems people use in production, and do take care of these. This set is much more narrow than the set of systems which people play with.
And also, we don't pay attention to test failures caused by, essentially, bad tests. If a test fails once in a while on a busy box, well, this is kind …

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Relevance of regression test failures on exotic platforms

Back in my days at MySQL we had a lot of issues with test failures. We had lots of platforms, and would try to run and maintain our regression test suite on all of them. I remember spending days investigating issues on some obscure OS (Mac OS, mainly, Windows was taken care of) or hardware (little-endian, mainly) .
With Tarantool, we never got to do that. We do run buidls on lots of platforms, and someone always screams when they break, since we only run builds on platforms which are in actual use. And they do break, so it's a lot of hassle. But we haven't had time to maintain the regression tests on some of these platforms. Ugly? Yes. Yet we know which systems people use in production, and do take care of these. This set is much more narrow than the set of systems which people play with.
And also, we don't pay attention to test failures caused by, essentially, bad tests. If a test fails once in a while on a busy box, well, this is kind …

[Read more]
5 reasons why MySQL replication lag is flapping between 0 and XXXXX

Working day to day with Percona Remote DBA customers, we have been facing an issue from time to time when MySQL replication lag is flapping between 0 and XXXXX constantly – i.e. Seconds_Behind_Master is 0 for a few secs, then it’s like 6287 or 25341, again 0 and so on. I would like to note the 5 different scenarios and symptoms of this – some are obvious and some are not really.

1. Duplicate server-ids on two or more slaves.

Symptoms: MySQL error log on a slave shows the slave thread is connecting/disconnecting from a master constantly.
Solution: check whether all nodes in the replication have unique server-ids.

2. Dual-master setup, “log_slave_updates” enabled, server-ids changed.

Scenario: you stop MySQL on the first master, then you stop the second one. …

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Re: MySQL Enterprise Backup 3.9.0 – An Insight

InnoDB does not support export/import of individual partitions and hence MEB selective backup does not support it

Flaghip Course of the Authentic MySQL Curriculum

The MySQL for Database Administrators training course is the flagship course of the authentic MySQL curriculum.

To bring this 5-day, instructor-led course to the largest number of students at their convenience, this course is not only available at a wide-selection of locations around the world, but also through two delivery methods where there is no travel required:

  • Training-on-Demand: Take this course from your own desk at your own pace, following lecture material through streaming video and setting your own schedule to perform lab exercises.
  • Live-Virtual Class: Attend a live class from your own desk.

In addition to these no-travel …

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Log Buffer #337, A Carnival of the Vanities for DBAs

The journey is old, but the milestones are new. It’s the same old quest for excellence. Innovative questions are being asked and answered in the blogs across the Oracle, SQL Server and MySQL branches of technologies. This Log Buffer Edition relishes just that. Let’s start this Log Buffer with the exquisite blog post by Dana Pylayeva.
Oracle:

EMlight might not be as important now with Oracle 12c coming out and with Oracle’s EM Express, but EMlight is still pretty cool.

The maximum size for VARCHAR2, NVARCHAR and RAW columns has been extended to 32767 bytes with the Oracle

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OurSQL Episode 154: Tooling Around, Part 4

This week we continue our series exploring the MySQL Utilities. Ear Candy is using the performance schema to find out which accounts fail to properly close connections, and At the Movies has a video about databases and determinism.

Part 1 of MySQL Utilities
Part 2 of MySQL Utilities
Part 3 of MySQL Utilities
Part 5 of MySQL Utilities

Events
DB Hangops - every other Wednesay at noon Pacific time

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