September 1, 2014

The patches are going to Launchpad

After some discussions on the OpenSQLCamp 2008 conference we decided to move our development to Launchpad, to be in stream with other MySQL related projects. We published our patches there https://code.launchpad.net/percona-patches, it is supposed to be main repository for the patches. We advise to use Launchpad bug system to report bugs and also for feature […]

Percona build7 with latest patches

We made new binaries for MySQL 5.0.67 build 7 which include patches we recently announced. The -percona release includes:

and -percona-highperf release additionaly includes

You can download RPMs for RedHat / CentOS 4.x and 5.x for x86_64, binaries, sources and patches there

Adaptive checkpointing

Do you know that there are two limits about dirty (modified but not flushed to disk) blocks of InnoDB buffer pool? One is the limit of “amount”. The other is the limit of “age”. – limit of “amount” – As you know, buffer pool of InnoDB works as write-back cache of its datafiles. If the […]

New SpecJAppServer results at MySQL and Sun.

As you likely have seen Sun has posted the new SpecJAppServer Results More information from Tom Daly can be found here These results are quite interesting for me as I worked on some of the previous SpecJAppServer Benchmarks several years ago while being employed by MySQL. These are great results, plus they can be relevant […]

Scaling to 256-way the Sun way

As you may have recently seen there are some articles about scaling MySQL one 256-way system. I though wow did they really make it work, considering how many bottlenecks remain in MySQL. What article really tells us ?

More patches

After some pause we are going to announce bunch of patches we made and ported for last period. Ported patches (ported from Google V2 patch): – innodb_fsync_source.patch – Show information about callers of fsync, more info – innodb_io_tune.patch – Port of two patches InnodbIOTune and InnodbAsync, more info – innodb_extra_status.patch – Show more information about […]

Thoughs on Innodb Incremental Backups

For normal Innodb “hot” backups we use LVM or other snapshot based technologies with pretty good success. However having incremental backups remain the problem. First why do you need incremental backups at all ? Why not just take the full backups daily. The answer is space – if you want to keep several generations to […]

Drilling down to the source of the problem

I had an interesting tuning case few days ago. The system serving high traffic using Innodb tables would be stalling every so often causing even very simple queries both reads and writes taking long time to complete, with progress almost paused (dropping from thousands to tens of queries per second). On the surface the problem […]

New Presentations published (Meetup and Highload)

We have finally found the time to update out presentation pages – we’ve added the presentation on MySQL Scaling by Sharding and Replication as well as Russian Language presentations I’ve given at HighLoad++ conference back in October. Innodb Scalability and New Features (Russian), Scaling MySQL-powered Web Sites by Sharding and Replication (Russian), Wonderful World of […]

Poor man’s query logging

Occasionally there is a need to see what queries reach MySQL. The database provides several ways to share that information with you. One is called general log activated with

(or

in MySQL 5.1+) start-up parameter. The log writes any query being executed by MySQL to a file with limited amount of additional information. […]