Some considerations on the p-p performance of the LHC during Run I

During the LHC Run I a very large amount of data has been collected, which can be used to improve the understanding of the behaviour of the accelerator. In this note, a preliminary analysis of the available data is reported, focusing on the stable beams data for p-p runs of the years 2011 and 2012. Not only time-evolution, but also correlation analysis of the key physical quantities such as peak luminosity, beam intensity etc. are reported here. A digression on the behaviour of the integrated luminosity will be made, while more details on this topic will be given in another paper.