Since 0.54 and till this patch (and exp 0.58) I have been experiencing memory issues where DayZ uses up an abnormally large amount of memory causing memory related issues. This is fixed if I use the Samsung Magician to optimize the windows drive (not where DayZ is installed) to maximum performance which gives a large amount of virtual memory, enough so I do not encounter the memory issue.
This is especially irritating because this is occurring in stable builds. {F32232}