I'm using MYSQL 5.0.91 I have a MyISAM table with a primary key defined as int(11) This is a simple user registration application.
Looking at the table, I'm seeing holes in the primary key, sometimes skipping one number, sometimes two, e.g. 263, 264, 266, 268. Nothing has been deleted - I'm the only one with access. I'm woried that users' registration details are being lost somehow.