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on nuodb and falcon 19 Aug 2013 | 01:27 am
Warning: this is a mixture of historical content, biases, stupid marketing and unknown/proprietary/closed source technologies. Proceed with caution. NuoDB marketing was sending out this message, enco...
on durability 9 Aug 2013 | 11:39 pm
MySQL did not start as a durable data store and had lots of mockery for that – (ISAM? no replication?). Eventually InnoDB took over, and it brought at least parts of MySQL into a reliable storage worl...
Hash of shame 22 Apr 2013 | 05:17 am
I may retract this post, I may have been way too incorrect here, not sure yet. Hash maps were invented sixty years ago, apparently. MySQL reinvented them. Original idea was too fancy and too good, I g...
MySQL 5.6 @ Facebook development tree 20 Apr 2013 | 05:58 am
MySQL 5.6 @ Facebook development tree Steaphan is a hero (well, everyone else on database engineering team are too) and he is driving efforts to publish MySQL 5.6 changes we’re making to the open. Now...
On performance schemas 17 Apr 2013 | 05:01 am
You should probably read Marc Alff’s post about configuring Performance Schema in MySQL 5.6. We wrote another guide, how to start using user/table/index statistics first introduced in Google patch, no...
The saddest bug of them all (SQL is dead?) 17 Apr 2013 | 04:52 am
From time to time I will observe servers wasting lots of CPU when doing batch row operations. In perf top it will look like this: 8.24% mysqld [.] Arg_comparator::compare_int_unsigned() 7.17% mysqld [...
on wikipedia and mariadb 18 Dec 2012 | 10:46 pm
There’s some media coverage about Wikipedia switching to MariaDB, I just wanted to point out that performance figures cited are somewhat incorrect and don’t attribute gains to correct authors. Proper ...
on seconds_behind_master sleuthing 22 Sep 2012 | 04:45 am
With large enough infrastructure it gets a bit more and more complicated to detect whether an incident or a problem is real systems problem or a monitoring glitch. This is a story of one such investig...
replication prefetching revisited 4 Sep 2012 | 03:59 pm
Been a while since I wrote about replication work we did. Fake changes based approach was huge success, and now our prefetching has lots of coverage, where standard SELECTs cannot reach. We’re running...
MySQL is bazillion times faster than MemSQL 26 Jun 2012 | 09:04 pm
I don’t like stupid benchmarks, as they waste my time. I don’t like stupid marketing, as it wastes my time too. Sometimes I succumb to those things, and now in return I want to waste your time a bit. ...
