XF 1.3 Why does the session table crash?

[Liam W]

This is the second time it's crashed now, I've repaired it and it seems fine (and I moved sessions to Memcache), but why did it crash?

Liam

 

[Mike]

It crashes if MySQL is stopped incorrectly (either the process crashing or the server crashing), a MySQL bug in MyISAM (very unlikely), or if there's an underlying hardware issue. It's almost certainly the first one though. (A very high server load, leading to memory allocation errors for example, could cause that.)