Re: my.cnf variables for memory tables

[Ingo Strüwing]

I believe that there is no other setting for memory tables.

I tend to answer yes to zero all cache sizes. But one thing comes to mind. If you select data from your tables, temporary tables might be created for the result. For joins these could become much bigger that your data size. If they exceed tmp_table_size they will be converted into MyISAM tables. If this happens, you should not have zeroed all cache sizes.

While typing I got aware of the query cache. It is table type independend. Depending on your statements it might be good to keep it.

There may be other thing too. I did not hear of an application like yours before. So surprises are expected. :-) I would be glad to hear how it works for you.

Regards

Ingo Strüwing, Senior Software Developer - Storage Engines
MySQL AB, www.mysql.com