A scanning manager (101) dynamically resizes (205) a flow scanning cache (109) based on signature (105) content in order to scan a flow (103) for signatures (105). The scanning manager (101) reads a directive (107) in a signature (105) to resize (205) the cache (109) in order to scan the flow (103) for the signature (105). The scanning manager (101) dynamically resizes (205) the cache (109) responsive to the directive (107), and scans for the signature (105) within the resized cache (109).

 
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