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Back from RIT2007

 | April 20, 2007 |  Posted In: Events and Announcements

So I’m back from RIT2007 which took place April 16,17 in Moscow,Russia. The conference was well organized, while the conference center was a bit small for event – halls were jam packed during the breaks and there was limited sitting available for many sessions. It was great to see attendees from almost all serious Internet […]

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How simple answer are you looking for ?

 | April 11, 2007 |  Posted In: Insight for Developers

I’ve got an interesting comment the other day saying “I’ve heard Jay Pipes saying indexes with cardinality lower than 30% are worthless, true?” That is interesting question and it has different answers depending on who is asking. A lot of people want to hear simple answers to the questions because they would be overwhelmed by […]

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COUNT(*) vs COUNT(col)

 | April 10, 2007 |  Posted In: Insight for Developers

Looking at how people are using COUNT(*) and COUNT(col) it looks like most of them think they are synonyms and just using what they happen to like, while there is substantial difference in performance and even query result. Lets look at the following series of examples:

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PBXT benchmarks

 | April 8, 2007 |  Posted In: Benchmarks

The PBXT Storage Engine (http://www.primebase.com/xt/) is getting stable and we decided to benchmark it in different workloads. This time I tested only READ queries, similar to ones in benchmark InnoDB vs MyISAM vs Falcon (https://www.percona.com/blog/2007/01/08/innodb-vs-myisam-vs-falcon-benchmarks-part-1) The difference is I used new sysbench with Lua scripting language, so all queries were scripted for sysbench.

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Master-Master or Master with Many Slaves

 | April 6, 2007 |  Posted In: Insight for DBAs

I just found post by Kevin, in which he criticizes Master-Master approach, finding Master with many slaves more optimal. There is surely room for master-N-slaves systems but I find Master-Master replication much better approach in many cases. Kevin Writes “It requires extra hardware thats sitting in standby and not being used (more money and higher […]

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MySQL Master-Master replication manager released

 | April 5, 2007 |  Posted In: Insight for DBAs

The MySQL Master-Master replication (often in active-passive mode) is popular pattern used by many companies using MySQL for scale out. Most of the companies would have some internal scripts to handle things as automatic fallback and slave cloning but no Open Source solution was made available. Few months ago we were asked to implement such […]

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