Systems and techniques relating to decoder memory management are described. A described system includes a decoder system configured to perform decoder processes in order to decode signals generated by reading a storage medium, the decoder processes being associated with respective memory thresholds; and a memory structure coupled with the decoder system. The decoder processes use the memory structure in accordance with the respective memory thresholds. The decoder system can be configured to detect whether the memory structure is underutilized by a process of the decoder processes, determine an underutilization amount associated with the process with respect to the memory threshold of the process, identify a target decoder process of the decoder processes, and enable the target decoder process to exceed the memory threshold of the target decoder process based on the underutilization amount. Enabling the target decoder process to exceed can increase decoding performance of the target decoder process.