Comments on: XtraDB storage engine release 1.0.3-4 codename Sakura

By: Dimitri

Dimitri — Thu, 16 Apr 2009 11:31:31 +0000

Hi Evgeniy,

it’s too late for me – I have to free my test platform for other customer, will see next time

For the moment I may only confirm on my tests @16cores:
– XtraDB-4 is not performing better on the read-only workload rather XtraDB-3
– InnoDB plugin-1.0.3 is outperforming XtraDB-3/4 on the read-only now
– XtraDB-3 is outperforming InnoDB plugin-1.0.3 on the read+write workload

I’ll publish my report soon if anybody is interested in.

Rgds,
-Dimitri

By: Evgeniy Stepchenko

Evgeniy Stepchenko — Thu, 16 Apr 2009 04:45:06 +0000

Dimitri,

Could you please try the patch lp:~percona-dev/percona-xtradb/rw-lock-fix-trial?

Regards,
Evgeniy

By: Kazuhiko

Kazuhiko — Sun, 12 Apr 2009 15:49:49 +0000

Hello. Thanks for the new release of XtraDB!
I found several issues.
* according to the srpm for RHEL5, it seems to use percona-xtradb-1.0.2-4.tar.gz not 1.0.3-4.
* several undefined references in case of HAVE_REPLICATION and MYSQL_SERVER:
* handler/ha_innodb.cc:2453: undefined reference to `active_mi’
* handler/ha_innodb.cc:1988: undefined reference to `init_strvar_from_file(char*, int, st_io_cache*, char const*)’
* handler/ha_innodb.cc:1988: undefined reference to `init_intvar_from_file(int*, st_io_cache*, int)’
* handler/ha_innodb.cc:2003: undefined reference to `init_strvar_from_file(char*, int, st_io_cache*, char const*)’
* handler/ha_innodb.cc:2003: undefined reference to `init_intvar_from_file(int*, st_io_cache*, int)’

By: Dimitri

Dimitri — Fri, 10 Apr 2009 08:25:30 +0000

Seems to me the rw_lock issue is not fixed completely because I’m hitting a complete xtradb freeze time to time, and mysqld restart is the only solution..

From the mysqld.log:

–Thread 1080 has waited at btr/btr0cur.c line 508 for 241.00 seconds the semaphore:
X-lock on RW-latch at fffffffc72f811f8 created in file buf/buf0buf.c line 683
a writer (thread id 1080) has reserved it in mode wait exclusive
number of readers 0, s_waiters flag 0, x_waiters flag 1, lock_word: 100000
Last time read locked in file btr/btr0cur.c line 508
Last time write locked in file btr/btr0cur.c line 508

All my sessions during the test using a different set of data (different object references) and freeze arrives seems to me when they access different but neighbor rows. This is not happening with InnoDB plugin nor “default” MySQL 5.1.33..

Do you need more info?

Rgds,
-Dimitri

By: Evgeniy Stepchenko

Evgeniy Stepchenko — Thu, 09 Apr 2009 19:25:06 +0000

Sander,

We uploaded deb package – http://www.percona.com/mysql/5.1.33-4/deb/

By: Evgeniy Stepchenko

Evgeniy Stepchenko — Thu, 09 Apr 2009 19:19:36 +0000

Dimitri,

Thank you! We loaded right files now.

By: Dimitri

Dimitri — Thu, 09 Apr 2009 16:30:18 +0000

Folks, excellent news!!
BTW, source file mysql-5.1.33-xtradb4.tar.gz doesn’t contain XtraDB code, is it normal?..

Rgds,
-Dimitri

By: Evgeniy Stepchenko

Evgeniy Stepchenko — Thu, 09 Apr 2009 15:16:02 +0000

Sander, yes we’ll build deb soon.

By: Sander

Sander — Thu, 09 Apr 2009 15:07:29 +0000

The links at percona still link to 5.1.31 and the ‘deb’ directory is empty at

http://www.percona.com/mysql/5.1.33-4/deb/

Will there be new .deb builds ??