Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

It seems I have a deadlock in mysql (running innodb) that's due in part to a lock on gen_clust_index, however, this isn't a table that I've created.

So... what's the short and sweet description of gen_clust_index and it's use and purpose in mysql.

share|improve this question
up vote 9 down vote accepted

Whenever you create a table with the InnoDB storage engine, an internal clustered index is generated under its hood. This is especially true if an InnoDB table has no Primary Key and no Unique Indexes.

Click here for MySQL Description of That Hidden Clustered Index

I hope this was short and sweet !!!

share|improve this answer
Perfect answer, thanks for the link. – Langley Feb 24 '11 at 16:47

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.