October 24, 2014

Another reason why SQL_SLAVE_SKIP_COUNTER is bad in MySQL

It is everywhere in the world of MySQL that if your replication is broken because an event caused a duplicate key or a row was not found and it cannot be updated or deleted, then you can use ‘ STOP SLAVE; SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; START SLAVE; ‘ and be done with it. In some cases this is fine and you can repair the […]

MySQL Wish for 2013 – Better Memory Accounting

With Performance Schema improvements in MySQL 5.6 I think we’re in the good shape with insight on what is causing performance bottlenecks as well as where CPU resources are spent. (Performance Schema does not accounts CPU usage directly but it is something which can be relatively easily derived from wait and stage information). Where we’re […]

Percona Live NY 2012 Super Saver discounts end tomorrow. Book Now!

If you’re looking for best prices for Percona Live NY 2012, taking place Oct 1,2 in New York do not delay and book now. Super Saver discounts ends tomorrow, which can save you hundreds of dollars off conference prices list prices. These are the best prices you can get by booking early – There will […]

Last chance for a discount on Percona Live DC!

In just over a week, we’ll be running a Percona Live MySQL conference in the nation’s capital, in a beautiful modern conference facility that has its own Metro rail stop. And for a limited time, you can save 20% with this discount code: PerLiveDC. If you’re in the DC area and you use MySQL, this […]

Innodb vs MySQL index counts

I had a customer recently who a few strange errors in their mysqld.err log:

This customer was running Percona Server 5.1 and they got this error on two tables during a maintenance window when they were adding indexes to the same tables.  We had a suspicion that it had something to do with Fast […]

Visit Percona at RailsConf 2011 — with a 20% discount!

Percona is sponsoring RailsConf again this year, and we’ll be at booth #110 in the expo hall. Use our discount code to save 20% off the ticket price: rc11mysql. We hope to see you there! (Sadly, we didn’t get any sessions accepted this year, so we won’t be speaking. Maybe next year.)

Want a discount to Percona Live?

We’ve given discount coupon codes to all of our Percona Live sponsors, so watch the Twitter tag #perconalive to find discount announcements. Here’s the list of sponsoring organizations: Clustrix Vork Continuent Fusion-io Infobright Pentaho Schooner Information Technology SkySQL Virident Webyog Akiban Couchbase EffectiveMySQL Facebook New Relic OmniTI Sphinx Tokutek We Build Pages Zmanda DaniWeb New […]

Hours remain for Percona Live NYC Early Bird Discount

Just few short hours remain for Early Bird Discount for Percona Live, New York City. This is your last chance to grab the ticket at almost 50% discount, for $129 instead of $259. We have a Great Session Lineup and outstanding networking opportunities !

A common problem when optimizing COUNT()

When optimizing queries for customers, the first thing I do with a slow query is figure out what it’s trying to do. You can’t fully optimize a query unless you know how to consider alternative ways to write it, and you can’t do that unless you know what the query “means.” I frequently run into […]

Implementing efficient counters with MySQL

On many web sites you would see a counter how many time given object – blog post, forum thread, image, movie etc was viewed. This is sometimes handy feature but it can be rather expensive from performance point of view. The nasty thing with counters as they are implemented the most trivial way – they […]