MyISAM and InnoDB tables in one database

Question

I have a database with about 30 tables and 5 tables of them is write-intensive.

I\'m considering

1. Convert 5 write-intensive tables to use InnoDB engine a

Answer 1

pros and cons for each.

for (1) pros: less disk space usage, myisam much faster for read-heavy access patterns

cons: memory must be shared between the innodb buffers and myisam key buffers. innodb tables are about 4x bigger than their myisam counterparts. programmatic code must be adapted for deadlock handling.

just remember innodb will also lock if you're changing an indexed column or primary key.