Methods, systems, and devices for configurable flush operation speed are described. Before executing a flush operation at a first portion of a cache including single-level cells (SLCs), a memory system may communicate parameters associated with data stored in the first portion of the cache to a host system. The host system may then identify another portion of the cache (e.g., including either SLCs or multi-level cells (MLCs)) for the flush operation based on the parameters and a speed of a flush operation associated with the other portions of the cache. The host system may indicate the identified portion of the cache to the memory system and the memory system may execute a flush operation at the first portion of the cache. For example, the memory system may write a subset of the data stored at the first portion of the cache to a second portion of the cache.