The present invention relates to a method to be carried out by a network support apparatus for managing resources of the apparatus, a method for managing resources of a network node, an apparatus for supporting the operation of a network and a resource management device, which particularly enable the determination of load at the apparatus or network node to allow more resource efficient scheduling of PM functions. The method carried out by the network support apparatus for managing resources comprises determining a load at the network support apparatus based on the number of events generated by recordings activated by at least one performance management function in a time period; comparing the determined load with a threshold load smaller than or equal to the maximum load supported by the network support apparatus; and performing a resource management procedure according to the result of the comparing step.