In the past… One of the typical problems you have when restarting mysqld is that the InnoDB buffer pool (buffer pool from now on) is empty and consequently access to the database requires reading directly from disk. Performance suffers dramatically as a consequence.

So the common solution is to artificially warm upthe server by doing queries which will fill the buffer pool. Typical solutions might be to do: SELECT COUNT(*) FROM some_table FORCE INDEX (PRIMARY) LIMIT ... on a number of tables to fill up the pool on startup. Fitting this into the standard mysql init start script is somewhat tricky as no hooks are provided for this sort of post-start action. (It would be nice to have this for other tasks too.)

Of course choosing the right parameters here can be tricky as workload changes over time, and as the ratio of the size of the database to the size of the buffer pool increases, you need to be more selective …

I’ll be at Percona Live to give a keynote on the latest innovations we are doing with MySQL. Also learn about the latest from the MySQL Engineers on InnoDB, Replication, and Performance

I’m really looking forward to Percona Live this year. I will be there, along with Kyle Redinger, my co-founder at VividCortex. I feel that this year the conference has come full circle. 2007 was my first year at the conference, and it was amazing. This year is tremendously exciting for me because it feels like we’re back on the 2007 trajectory.

Those were the golden days. Things were a little sad in 2010 and 2011 as the MySQL community tried to figure out the new landscape and O’Reilly decided to stop running the event, but then in 2012 we all said “we’re back!” with the exception of Oracle, who instead arranged MySQL Connect, as part of Oracle Open World. I don’t think that was a huge success. I don’t know if that’s why Oracle has decided to participate in this year’s Percona MySQL conference, but frankly it …

This is my 10th year attending and speaking at the MySQL Users Conference (as the Percona Live MySQL Conference and Expo was originally called back in 2003), and for me it does not get tiring. So what is there in this conference for me as an attendee, speaker and businessman?

Learning. First and foremost the conference is still a great learning venue for me. I learn about new technologies in the MySQL space as well as how these technologies can be applied in practice. I learn what works and what does not. I learn from the sessions, expo hall exhibitors and hallway conversations. I’m glad that over so many years the conference is still …

Join us for MySQL Connect and submit a paper

The new MySQL 5.6 GA release delivers a host of new capabilities to support developers releasing new services faster, with more agility, performance and security .

One of the areas with the most far-reaching set of enhancements is MySQL replication used by the largest web, mobile and social properties to horizontally scale highly-available MySQL databases across distributed clusters of low cost, commodity servers.

A new on-demand MySQL 5.6 replication webinar takes you on a guided tour through all of those enhancements, including:

- 5x higher master and slave …

Kitty is a fork of putty (0.62 version), with all old features along with an extended features. It is one of the best (my view), open source ssh/telent client for windows.

Link http://kitty.9bis.net/

Kitty Screenshot.

Features:

1. Sessions filter
2. Portability
3. Session Launcher
4. Automatic logon script
5. URL hyperlinks
6. Automatic password/commad

Unfortunatelly, kitty doesn't have multi-tab feature. MTPutty (Multi-tabbed Putty) can be used as a containor for kitty/putty. This utility enables you to wrap unlimited number of kitty/putty applications into one tabbed GUI interface.  The combination of these two tools kitty+MTPutty gives you a strong controlled of kitty sessions and more power in your hand to handle a lot.

Link …

A few weekends ago, I started to again look at the code in Drizzle for producing internal temporary tables. Basically, we have a few type of tables:

• Standard
• Temporary (from CREATE TEMPORARY TABLE)
• Temporary (from ALTER TABLE)
• Internal temporary (to help with query execution)

If you’re lucky enough to be creating one of the first three types, you go through an increasingly lovely pile of code that constructs a nice protobuf message about what the table should look like and hands all responsibility over to the storage engine as to how to do that. The basic idea is that Drizzle gets the heck out of the way and lets the storage engine do its thing. This code path looks rather different than what we inherited from MySQL. For a start, we actually have a StorageEngine object rather than just lumping everything into the handler (which we correctly name a Cursor). However… the final …

I’m really looking forward to Percona Live this year. I will be there, along with Kyle Redinger, my co-founder at VividCortex. I feel that this year the conference has come full circle. 2007 was my first year at the conference, and it was amazing. This year is tremendously exciting for me because it feels like we’re back on the 2007 trajectory. Those were the golden days. Things were a little sad in 2010 and 2011 as the MySQL community tried to figure out the new landscape and O’Reilly decided to stop running the event, but then in 2012 we all said “we’re back!

Nice article about SimCity outage and ways to defend databases: http://www.mysqlperformanceblog.com/2013/03/16/simcity-outages-traffic-control-and-thread-pool-for-mysql/

The graphs showing throughput with and without the thread pool are taken from the benchmark performed by Oracle and taken from here:
http://www.mysql.com/products/enterprise/scalability.html

The main take away is this graph (all rights reserved to Oracle, picture original URL):

Scalability is where throughput can grow and grow, as demand grows. I need to get more from the database, the question …