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10 Newer Entries Showing entries 31 to 40 of 93 10 Older Entries

Displaying posts with tag: performance_schema (reset)

SF MySQL Meetup Presentation: Changes in MySQL 5.7
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Last Wednesday, I spoke at the San Francisco MySQL Meetup on the topic of changes coming in MySQL 5.7 (and later).  We actually went through two different slide decks; the first on features being considered for deprecation in MySQL 5.7 (or later), and the second set providing a brief overview of the new features and benefits already introduced in MySQL 5.7 via the development milestone releases (DMRs) published to date.  A big thanks to the entire SF Meetup group, and in particular the organizers (Erin, Mike and Darren), for having me.  The event was streamed and recorded, and you can view the …

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Fun with Bugs #26 - MySQL bugs Oracle had not fixed for me (yet)
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In the previous post in this series I've listed 15 MySQL bug reports, documentation and feature requests I've made in 2013 that got fixes or any other kind of solution. Now it's time to check what happened to the rest and try to think why.

First of all, no MySQL bug reporter is perfect (if only …

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Fun with Bugs #25 - MySQL bugs Oracle fixed for me this year
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I've checked recently and noted that I've sent 50 reports about MySQL bugs, features I'd like to see and unclear/missing manual pages this year. It all started with famous Bug #68079 (reported on January 14, 2013), that got a lot of attention, valuable workaround from Oracle and caused a lot of work that is going to improve MySQL scalability substantially in the future.

Oracle had also implemented this my (and not only mine!) feature request, Bug #69527, and in MySQL 5.7.3 PERFORMANCE_SCHEMA …

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What SQL is running in MySQL
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Using the MySQL 5.6 Performance Schema it is very easy to see what is actually running on your MySQL instance. No more sampling or installing software or worrying about disk I/O performance with techniques like SHOW PROCESSLIST, enabling the general query log or sniffing the TCP/IP stack.

The following SQL is used to give me a quick 60 second view on a running MySQL system of ALL statements executed.

use performance_schema;
update setup_consumers set enabled='YES' where name IN ('events_statements_history','events_statements_current','statements_digest');
truncate table events_statements_current; truncate table events_statements_history; truncate table …
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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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The second MySQL seminar: a summary
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Once again, Geir Høydalsvik and I had the pleasure of hosting a MySQL mini-seminar in Trondheim. 25+ attendants from at least 7 different companies and a few professors from the computer science dept. at NTNU showed up on yesterdays event. I recognized many of these from the first seminar but there were some new faces as well.

This time, Mark Leith came on a visit from the UK. He gave an introduction to Performance Schema and ps_helper. ps_helper is a really nice tool to …

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New MySQL 5.6-Feature host_cache_size does not work
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Today as i was learning for the new MySQL 5.6-certification (more about that in a later post) i stumbled again across the host_cache-Table that was added to MySQL in 5.6.5. Before that you had no chance to check which hosts are already known by the MySQL-server.

So thats a pretty good feature for us. And even better: you could resize the size of the host_cache now! Whoohoo, awesome! As we have a lot of servers that need to connect to one of our MySQL-server and we could not switch to ip-based-authentication we were really happy to tune the host_cache-size without recompiling MySQL.

Unfortunately i noticed that the …

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MySQL Connect and Oracle Open World Presentations Online
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After a slight delay (travel and catching up with “real work”), I’ve now uploaded the talks that I gave at MySQL Connect and Oracle Open World.

They are available on my Presentations Page, and inline below for convenience. The “Introduction to MySQL Enterprise Monitor” talk was actually a full demo, but there are some screenshots of MEM 3.0 in there if you’re interested in seeing a high level picture of what it looks like now.

Thanks to all that attended my talks, I got a lot of good questions and feedback!

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Fun with Bugs #24 - PERFORMANCE_SCHEMA
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It seems that one of my session proposals is accepted for Percona Live London 2013, so I have to prepare myself to speak about PERFORMANCE_SCHEMA new features and problems in MySQL 5.6. Bugs are going to be discussed, among other things. Let's check current active bugs (and some "Not a bug"s) related to PERFORMANCE_SCHEMA in this issue.

I'd like to start with Bug #68514 that got some attention this week again, in despite of its "Not a bug" …

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Understanding max_connect_errors
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To only slightly misquote one of the greatest movies of all times:

You keep using that option.  I do not think it means what you think it means.


Perhaps like many users, I had certain assumptions about what max_connect_errors really does – but in looking closely as part of investigating the new PERFORMANCE_SCHEMA.HOST_CACHE table in MySQL 5.6, I learned that some very fundamental elements had escaped my notice.  I’m writing this blog post to help others who hold similar …

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10 Newer Entries Showing entries 31 to 40 of 93 10 Older Entries

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