'Tunning' Category

• It’s about Time.

  January 27, 2011

  WHAT TIME IS IT? This post started with a simple question: “Does the function NOW() get executed every time a row is examined?” According to the manual,  “Functions that return the current date or time each are evaluated only once per query …. multiple references to a function such as NOW() … produce the same [...]

  posted in Commentary, Tips & Tricks, Tunning by mark

• Does Size or Type Matter?

  July 27, 2010

  MySQL seems to be happy to convert types for you. Developers are rushed to complete their project and if the function works they just move on. But what is the costs of mixing your types? Does it matter if your are running across a million rows or more? Lets find out. Here is what the [...]

  posted in Tips & Tricks, Tunning by mark

• MySQL Network Connections

  May 7, 2010

  If your MySQL server has hundreds of clients (applications) and tens of thousands of queries per second,  MySQL default network settings may NOT be for you.  Network performance is not often a significant factor in the performance of MySQL.  That said, there are things to consider. If you are building new applications make these changes [...]

  posted in Tunning by mark