Hey,
I have a multisite running with several and wondered why it uses MyISAM and InnoDB at the same time:
mysql> select TABLE_NAME, ENGINE from information_schema.TABLES WHERE TABLE_SCHEMA='wordpress';
+--------------------------+--------+
| TABLE_NAME | ENGINE |
+--------------------------+--------+
| wp_2_commentmeta | MyISAM |
| wp_2_comments | MyISAM |
| wp_2_links | MyISAM |
| wp_2_options | MyISAM |
| wp_2_postmeta | MyISAM |
| wp_2_posts | MyISAM |
| wp_2_term_relationships | MyISAM |
| wp_2_term_taxonomy | MyISAM |
| wp_2_terms | MyISAM |
| wp_3_commentmeta | MyISAM |
| wp_3_comments | MyISAM |
| wp_3_links | MyISAM |
| wp_3_options | MyISAM |
| wp_3_postmeta | MyISAM |
| wp_3_posts | MyISAM |
| wp_3_term_relationships | MyISAM |
| wp_3_term_taxonomy | MyISAM |
| wp_3_terms | MyISAM |
| wp_4_commentmeta | MyISAM |
| wp_4_comments | MyISAM |
| wp_4_links | MyISAM |
| wp_4_options | MyISAM |
| wp_4_postmeta | MyISAM |
| wp_4_posts | MyISAM |
| wp_4_term_relationships | MyISAM |
| wp_4_term_taxonomy | MyISAM |
| wp_4_terms | MyISAM |
| wp_5_commentmeta | MyISAM |
| wp_5_comments | MyISAM |
| wp_5_links | MyISAM |
| wp_5_options | MyISAM |
| wp_5_postmeta | MyISAM |
| wp_5_posts | MyISAM |
| wp_5_term_relationships | MyISAM |
| wp_5_term_taxonomy | MyISAM |
| wp_5_terms | MyISAM |
| wp_6_commentmeta | InnoDB |
| wp_6_comments | InnoDB |
| wp_6_links | InnoDB |
| wp_6_options | InnoDB |
| wp_6_postmeta | InnoDB |
| wp_6_posts | InnoDB |
| wp_6_term_relationships | InnoDB |
| wp_6_term_taxonomy | InnoDB |
| wp_6_terms | InnoDB |
| wp_7_commentmeta | InnoDB |
| wp_7_comments | InnoDB |
| wp_7_links | InnoDB |
| wp_7_options | InnoDB |
| wp_7_postmeta | InnoDB |
| wp_7_posts | InnoDB |
| wp_7_term_relationships | InnoDB |
| wp_7_term_taxonomy | InnoDB |
| wp_7_terms | InnoDB |
| wp_8_commentmeta | InnoDB |
| wp_8_comments | InnoDB |
| wp_8_links | InnoDB |
| wp_8_options | InnoDB |
| wp_8_postmeta | InnoDB |
| wp_8_posts | InnoDB |
| wp_8_term_relationships | InnoDB |
| wp_8_term_taxonomy | InnoDB |
| wp_8_terms | InnoDB |
| wp_blog_versions | MyISAM |
| wp_blogs | MyISAM |
| wp_commentmeta | MyISAM |
| wp_comments | MyISAM |
| wp_domain_mapping | MyISAM |
| wp_domain_mapping_logins | MyISAM |
| wp_links | MyISAM |
| wp_options | MyISAM |
| wp_postmeta | MyISAM |
| wp_posts | MyISAM |
| wp_registration_log | MyISAM |
| wp_signups | MyISAM |
| wp_site | MyISAM |
| wp_sitemeta | MyISAM |
| wp_term_relationships | MyISAM |
| wp_term_taxonomy | MyISAM |
| wp_terms | MyISAM |
| wp_usermeta | MyISAM |
| wp_users | MyISAM |
+--------------------------+--------+
82 rows in set (0.01 sec)As I prefer InnoDB over MyISAM and moreover prefer to tune a MySQL for one engine only, I'd like to convert all tables to InnoDB by a simple ALTERNATE TABLE. Is there any reason against doing this?
Best.