Techniques for writing logging files, where the logging files include multiple pieces of logging information. The pieces of logging information are based on operation of a computer system. The writing of the logging information includes the following steps (not necessarily in the following order): (i) choosing a set of logging rules; which logging rules determine the selection of which pieces of operational information relating to the computer system will be written to a non-volatile log file; (ii) operating the computer system; (iii) during operation of the computer system, collecting a first set of pieces of operational information; (iv) saving the first set of pieces of operational information to a volatile buffer memory; and (v) writing only a first sub-set of the first set of pieces of operational information to a first log file.