July 30, 2014

Aligning IO on a hard disk RAID – the Theory

Now that flash storage is becoming more popular, IO alignment question keeps popping up more often than it used to when all we had were rotating hard disk drives. I think the reason is very simple – when systems only had one bearing hard disk drive (HDD) as in RAID1 or one disk drive at […]

Percona-XtraDB version 9.1

Dear Community, We are announcing today the new version 9.1 of XtraDB storage engine. The name of binaries has changed to Percona-XtraDB. It is applicable to all packages including RPM, DEB and tar.gz packages. New features in version 9.1: MySQL 5.1.43 is taken as the basis packages name changed to Percona-XtraDB Enabled support of SSL […]

XtraDB storage engine release 1.0.6-9

Dear Community, As of today Release 9 of XtraDB storage engine is available. The release includes following new features: The release is base on 1.0.6 version of InnoDB plugin. MySQL 5.1.42 as a base release Separate purge thread and LRU dump is implemented (this feature was actually added in Release 8, but somehow it was […]

The perils of InnoDB with Debian and startup scripts

Are you running MySQL on Debian or Ubuntu with InnoDB? You might want to disable /etc/mysql/debian-start. When you run /etc/init.d/mysql start it runs this script, which runs mysqlcheck, which can destroy performance. It can happen on a server with MyISAM tables, if there are enough tables, but it is far worse on InnoDB. There are […]