Admitedly I am not yet MySQL certified. So my last post was more based on knowledge of DBMS in general. A few people have noted that the issues described in my previous post might not apply to the InnoDB table handler. So I will need to research this a bit. Actually I am planning to become MySQL certified and so its quite handy that the new certification guide is to be released on august 19th.

The other day a discussion in #mysql on freenode developed concering possible issues arising from using auto increment on primary key fields due to the danger of hotspots. Since I am currently preparing a new talk first to be held at php|works on SQL performance tuning I thought that the topic would make for a perfect warming up post on the general topic.

Well when ever people talk about integrating LiveUser into their project they usually at some point ask: "where is the documentation?" Or worse they say "I wasted hours to get this stuff working, it looks promising but I gave up".