CMS detector performance

The CMS experiment at the LHC collected last year around 5 /fb of integrated luminosity at 7 TeV center-of-mass energy. The CMS detector has shown an excellent data taking efficiency. The global CMS and several subdetectors performances will be presented. The goal of the 2012 operations is to collect again 5 /fb by the end of June and finally 15 /fb at the end of the year, with a new center-of-mass energy at 8 TeV and higher luminosity. The CMS detector should cope with these new conditions and the first results from this year data will be given.