1. A network traffic management apparatus, comprising: a first memory including a flow cache table including a plurality of entries; and configurable hardware logic coupled to the first memory and a processor, the configurable hardware logic comprising a valid split table including a plurality of entries, wherein each of the plurality of entries includes a validity bit and the configurable hardware logic is configured to implement: periodically determining whether the validity bit of each of the entries of the valid split table is set; and retrieving one of the plurality of entries of the flow cache table corresponding to an index value associated with one of the plurality of entries of the valid split table, when it is determined that the validity bit of the one of the plurality of entries of the valid split table is set.