High kernel time with MariaDB on Fedora 11

[Xiang Fang]

Hi all,

I tried to run Sysbench/Readonly workload with MariaDB 5.1.38 (using maria storage engine)
on Fedora 11 (linux 2.6.29 x86_64 kernel) and I found the kernel time is higher to about
70%, so the performance was very bad. If we run Mysql 5.4.1-beta (using innodb storage
engine), the kernel time is only about 10% and performance of Sysbench/Readonly is about
9x than MariaDB 5.1.38.

The oprofile data showed that the hottest method in kernel is __ticket_spin_lock with
MariaDB.

I also tried run on Redhat EL5.2 before, but it failed since MariaDB 5.1.38 need glibc 2.7
above and RHEL 5.2 only has glibc2.5.

Does anyone meet the same issue or not? I want to know what is the prefer OS and
configuration for MariaDB for performance evaluation.

Thanks very much,
Xiang