Reparo WordPress MySQL Comment Table…Why?

Nowadays my WordPress comments table is frequently getting corrupted and I have to repair it. The MySQL table repair command does the trick. However it is bothering me. I am suspecting there are multi-threading issues with WordPress comment processing code which is triggering as I am having huge load recently. I wonder if other bloggers have faced it too.

PS. In case you are wondering the syntax for repairing a MySQL table is:
repair table table_name;

PS 2: Reparo is the magic universal repair incantation in Harry Potter’s magical world. In the end he uses the elder wand to repair his own phoenix wand.