Comments on: Leveraging the InnoDB Plugin http://ronaldbradford.com/blog/leveraging-the-innodb-plugin-2011-02-11/ Expert times and information on MySQL Thu, 09 May 2013 15:50:26 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: LinuxJedi http://ronaldbradford.com/blog/leveraging-the-innodb-plugin-2011-02-11/comment-page-1/#comment-11074 LinuxJedi Mon, 14 Feb 2011 10:29:37 +0000 http://ronaldbradford.com/blog/?p=3468#comment-11074 It should probably be noted that in tests with InnoDB 1.1.4 for both Drizzle and MySQL 5.5 we have found that innodb_file_per_table leads to around a 15% performance hit on read/write OLTP Sysbench. We are guessing that this is due to the extra fsyncs required for the common tablespace as well as the tablespace-per-table files but we haven't looked too deeply into it yet. It should probably be noted that in tests with InnoDB 1.1.4 for both Drizzle and MySQL 5.5 we have found that innodb_file_per_table leads to around a 15% performance hit on read/write OLTP Sysbench. We are guessing that this is due to the extra fsyncs required for the common tablespace as well as the tablespace-per-table files but we haven’t looked too deeply into it yet.

]]> By: Holger Thiel http://ronaldbradford.com/blog/leveraging-the-innodb-plugin-2011-02-11/comment-page-1/#comment-11072 Holger Thiel Mon, 14 Feb 2011 10:02:57 +0000 http://ronaldbradford.com/blog/?p=3468#comment-11072 This is not a migration issue. The innodb_file_per_table is stable since MySQL 5.0. You can use the same InnoDB tables/files from MySQL 5.1 in MySQL 5.5. Beware: To many tables are not good with using innodb_file_per_table. This is not a migration issue.

The innodb_file_per_table is stable since MySQL 5.0.

You can use the same InnoDB tables/files from MySQL 5.1 in MySQL 5.5.

Beware: To many tables are not good with using innodb_file_per_table.

]]> By: Daniël van Eeden http://ronaldbradford.com/blog/leveraging-the-innodb-plugin-2011-02-11/comment-page-1/#comment-11063 Daniël van Eeden Sun, 13 Feb 2011 11:44:03 +0000 http://ronaldbradford.com/blog/?p=3468#comment-11063 This could also be a nice moment to recreate the InnoDB logfiles and adjust the size of them. The parameters are innodb_log_file_size and innodb_log and innodb_log_files_in_group. I believe that the default is 2 files of 5MB, which is very small. Changing this to 2 files of 1G could improve performance. This could also be a nice moment to recreate the InnoDB logfiles and adjust the size of them. The parameters are innodb_log_file_size and innodb_log and innodb_log_files_in_group. I believe that the default is 2 files of 5MB, which is very small. Changing this to 2 files of 1G could improve performance.

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